# Cleanroom Metrology LLC > Calibration Wafer Standards, Cleanroom Foggers and Particle Size Standards supporting USP 797 guidelines in FDA airflow smoke studies and contamination control, Cleanroom Metrology ## Pages - [Contact](https://cleanroommetrology.com/contact/): Contact Us for Metrology, Particle Size Standards & Smoke Study Solutions Let’s start talk with us. We are here to assist you with any inquiries, support requests, or feedback. Contact us for smoke studies, calibration of your SSIS tools and wafer inspection systems, particle size standards and Smoke Studies Foggers. Location 2550 South County Road 100, Alamosa, CO 81101 Customer Support 720-635-3931, 818-292-5668, 818-292-5668 Email us Sales@CleanroomMetrology.com Support@CleanroomMetrology.com Service@CleanroomMetrology.com We’re Here to Help Frequently Asked Questions Find answers to common questions about our response times and customer support. Learn what to expect when you reach out to Cleanroom Metrology LLC. […] - [Polystyrene Microsphere Beads](https://cleanroommetrology.com/polystyrene-microsphere-beads/): Polystyrene Microsphere Beads Polystyrene Micro-spheres are spherical in design, highly accurate is size diameter with NIST traceabilty, provided with a narrow size distribution, and provided with a Size Certificate that includes the particle specification. Particle size standards are extremely accurate for calibration of your laser particle counters, water inspection systems and other metrology instruments used in your science studies. Here is a list of particles packaged with 1% or less micro-sphere concentration in 15 ml De-ionized water. Each bottle ships with a NIST-Traceable, Particle Size Certificate showing date of manufacture and manufacturing specs. If you handle the bottles with contamination […] - [Return and Refund Policy](https://cleanroommetrology.com/return-and-refund-policy/): Calibration Wafer Standards are produced to a customer specification and are not provided with a warranty and are not a returnable product. Contact our customer service department at 720-635-3931 to request a Return RMA number. Cleanroom Metrology LLC will issue an RMA number and provide shipping address for return of your product for repair or replacement. Any unopened product that is returned and not damaged in any way as determined by Cleanroom Metrology LLC, will incur a 25% restock fee to your returned product. If product is damaged in any way, the customer is responsible for payment of the full […] - [Terms and Conditions](https://cleanroommetrology.com/terms-and-conditions/): Last updated September 1, 2025 AGREEMENT TO TERMS These Terms of Use constitute a legally binding agreement made between you, whether personally or on behalf of an entity (“you”) and Cleanroom Metrology LLC (“Company“, “we”, “us”, or “our”), concerning your access to and use of the https://CleanroomMetrology.com Web Site as well as any other media form, media channel, mobile Site or mobile application related, linked, or otherwise connected thereto (collectively, the “ Site”). You agree that by accessing the Web Site, you have read, understood, and agreed to be bound by all of these Terms of Use. IF YOU DO […] - [PRIVACY POLICY](https://cleanroommetrology.com/privacy-policy/): We care about data privacy and security. By using the Web Site or the Marketplace Offerings, you agree to be bound by our Privacy Policy posted on the Web Site, which is incorporated into these Terms of Use. Please be advised the Web Site and the Marketplace Offerings are hosted in the United States. If you access the Web Site or the Marketplace Offerings from the European Union, Asia, or any other region of the world with laws or other requirements governing personal data collection, use, or disclosure that differ from applicable laws in the United States, then through your […] - [DISCLAIMER](https://cleanroommetrology.com/disclaimer/): THE WEB SITE IS PROVIDED ON AN AS-IS AND AS-AVAILABLE BASIS. YOU AGREE THAT YOUR USE OF THE WEB SITE SERVICES WILL BE AT YOUR SOLE RISK. TO THE FULLEST EXTENT PERMITTED BY LAW, WE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, IN CONNECTION WITH THE WEB SITE AND YOUR USE THEREOF, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT. WE MAKE NO WARRANTIES OR REPRESENTATIONS ABOUT THE ACCURACY OR COMPLETENESS OF THE WEB SITE’s CONTENT OR THE CONTENT OF ANY WEB SITES LINKED TO THIS WEB SITE AND WE WILL ASSUME NO LIABILITY […] - [Dry Silica Microspheres](https://cleanroommetrology.com/dry-silica-microspheres/): Dry Silica Microspheres Dry Silica Microspheres are particle size standards used in aerosol research for instrument size calibration, atmospheric testing, drug delivery and CMP slurries. Typically the CMP Slurry dry silica is produced at 800 nanometer diameter, but can be tailored to your size specification. Dry Silica can be ordered in 1 gram volume; or can be special ordered in 1 Kg volume. Product Part # Particle Diameter Size Typical Size Distribution Concentration Price Add to Cart A particle size standard is only good if its reliable and repeatable. The Dry Silica Microspheres particles we offer are for this exact […] - [Dry Polystyrene Microspheres](https://cleanroommetrology.com/dry-polystyrene-microspheres/): Dry Polystyrene Microspheres Dry polystyrene microsphere particles, also known as Dri-Cal Particle Size Standards, are very accurate in size diameter and lot-numbered for convenient technical service and support after the sale. Each Bottle includes a Certificate of Calibration and Traceability to NIST, which includes a description of the calibration method and its uncertainty; Table of chemical and physical properties; Material Safety Data Sheet. Dry Particles are sold in 1 gram volume per bottle, but can be special ordered at higher volume per bottle. Diameters of 200 μm and larger are packaged as dry Polystyrene spheres crosslinked with divinylbenzene (PSDVB). Product […] - [Silica Microspheres](https://cleanroommetrology.com/silica-microspheres/): Silica Microspheres Particle Size Standards Silica Microspheres are highly accurate particle size standards, produced as micro-spheres, and used in aerosol research for instrument size calibration, atmospheric testing, drug delivery and Semiconductor Metrology applications. Silica can be ordered in 15 mL volume. Product Part # Particle Diameter Size Typical Size Distribution Concentration Price Add to Cart Silica Microspheres Particle Size Standards play a key role in precise calibration across industries. These standards help ensure accurate measurements in particle sizing. Think of them as the reliable benchmark that keeps your data trustworthy, like a steady compass in a vast ocean of variables. […] - [Dry Fluorescent Microspheres](https://cleanroommetrology.com/dry-fluorescent-microspheres/): Dry Fluorescent Microspheres Thermo Scientific™ Fluoro-Max Green and Red, Dry Fluorescent Polystyrene Particles are polymer particles, which have been dyed with bright, distinct green and red colors. Fluoro-Max Green and Red Dry Fluorescent Particles are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C). They are typically observed using an epifluorescence microscope, confocal microscope, fluorometer, fluorescence spectrophotometer, or viewed using mineral light, black UV light or a fluorescence activated cell sorter. Dry Fluorescent Polystyrene Particles are most often used in Filter Testing, Flow Tracing and Biological research. Spectral information is approximate […] - [About](https://cleanroommetrology.com/about/): Discover Our Expertise Cleanroom Metrology LLC: Precision in Contamination Control Find how our metrology solutions in smoke studies and and contamination control can improve the calibration of your wafer inspection systems and aerosol particle counters, and how our foggers will improve your smoke studies in your semiconductor clean rooms or pharmaceutical process labs. Learn More About Cleanroom Metrology LLC Founded with a focus on contamination control and metrology support, the staff of Cleanroom Metrology LLC have worked directly with Engineers, Technicians and Operation Managers for many years. We provide precision-engineered Particle Size Standards and Calibration Wafer Standards with NIST Traceability […] - [My account](https://cleanroommetrology.com/my-account/): My Account Dashboard Orders Downloads Addresses Account Details Attachments Logout Hello leoharper339@gmail.com (not leoharper339@gmail.com? Log out) From your account dashboard you can view your recent orders, manage your shipping and billing addresses, and edit your password and account details. - [Checkout](https://cleanroommetrology.com/checkout/): Checkout Billing Details First Name * Last Name * Country / Region *United States (US) Street address * Apartment, suite, unit, etc. (optional) Town / City * State *Select an option…AlabamaAlaskaArizonaArkansasCaliforniaColoradoConnecticutDelawareDistrict of ColumbiaFloridaGeorgiaHawaiiIdahoIllinoisIndianaIowaKansasKentuckyLouisianaMaineMarylandMassachusettsMichiganMinnesotaMississippiMissouriMontanaNebraskaNevadaNew HampshireNew JerseyNew MexicoNew YorkNorth CarolinaNorth DakotaOhioOklahomaOregonPennsylvaniaRhode IslandSouth CarolinaSouth DakotaTennesseeTexasUtahVermontVirginiaWashingtonWest VirginiaWisconsinWyomingArmed Forces (AA)Armed Forces (AE)Armed Forces (AP) ZIP Code * Phone (optional) Email Address * Order Notes (optional) Your Order Product Subtotal Polystyrene Microsphere Beads AM4316A  × 1 $545.00 Polystyrene Microsphere Beads AM4260A  × 2 $1,090.00 Subtotal $1,635.00 Total $1,635.00 Sorry, it seems that there are no available payment methods. Please contact us if you require assistance or wish to make alternate arrangements. Since your browser does not support JavaScript, or […] - [Cart](https://cleanroommetrology.com/cart/): Your Cart Remove item Thumbnail image Product Price Quantity Subtotal × Polystyrene Microsphere Beads AM4316A $545.00 Polystyrene Microsphere Beads AM4316A quantity $545.00 × Polystyrene Microsphere Beads AM4260A $545.00 Polystyrene Microsphere Beads AM4260A quantity $545.00 Update Cart Cart Totals Subtotal $1,090.00 Total $1,090.00 Proceed to checkout - [Shop](https://cleanroommetrology.com/shop/) - [Cleanroom Metrology - Fogger and Wafer Standard](https://cleanroommetrology.com/): Calibration Wafer Standards, Cleanroom Smoke Studies, Airflow Visualization Foggers, Silica Microspheres, Polystyrene Microspheres, Particle Size Standards Learn More PSL Calibration Wafer Standards are produced for calibration of KLA-Tencor, Hitachi, etc. wafer inspection machines, referred to as SSIS tools. Polystyrene microspheres are deposited from 30 nm up to 15 µm on the surface of 300mm, 200mm, 150mm, 125mm, 100mm and 75mm wafers; as well as customer quartz masks and customer film deposited wafers. These standards are referred to by Metrology Engineers as Particle Size Standards, Wafer Standards, PSL Wafer Standards and Wafer Calibration Standards, etc. Particle Size Standards are deposited on […] ## Products - [Portable Glycerin Fogger, AFM Fog Pistol](https://cleanroommetrology.com/product/portable-glycerin-fogger/): Cleanrooms and ISO Suites have a constant flow of people and airflow turbulence. Technicians doing maintenance, Process Engineers working in production and robotic systems in movement cause contamination issues in cleanrooms and ISO Suites. Periodic maintenance and certification of the airflow is required according to USP 797 and / or ISO 14644-3 guidelines. What type of clean room fogger do you use. This portable glycerin fogger supports FDA and ISO guidelines to support your smoke studies. FDA requires a neutral buoyant fog for airflow visualization in FDA controlled smoke studies. The Fog Pistol provides a neutral buoyant fog, that floats in the airflow for long distances for excellent airflow movement visibility, and does not rise or drop in the airflow due to the fog buoyancy and is not affected by temperature changes in the airflow. Portable Glycerin Fogger, AFM Fog Pistol.pdf - [AFM30 Smoke Studies Fogger for Airflow Visualization](https://cleanroommetrology.com/product/afm30-smoke-studies-fogger/): AFM30 Smoke Studies fogger, stainless steel, ≈ 1 M³ / Min. pure fog, ≈ 12 ft. visual distance, ≈ 45 M³ fog in 45 min. cycle, visualize airflow turbulence in Barrier Isolator, BSC, Airflow Hood, One 80mm fog outlet w/ velocity & volume control, Wireless control is optional along with 10 fog accessories. - [AFM Cube Smoke Studies Fogger for Airflow Visualization](https://cleanroommetrology.com/product/afm-cube-smoke-studies-fogger-for-airflow-visualization/): AFM Cube Smoke Studies Fogger for Airflow Visualization, stainless steel, ≈ 0.71 M³ / Min. pure fog, ≈ 7-8 ft. visual distance, ≈ 32 M³ fog in 45 min. cycle, visualize airflow turbulence in BSC, Bio-Safety Cabinet, Airflow Hood, Glove Box. One 80mm fog outlet w/ fog velocity & volume control. CRM-AFM-Cube-Smoke-Studies-Fogger-Product-Sheet.pdf - [Apollo 50 Liquid Nitrogen Fogger, LN2 Fogger](https://cleanroommetrology.com/product/apollo-50-liquid-nitrogen-fogger-ln2-fogger/): Apollo 50 Nitrogen-Di-Water Fogger with rolling, stainless steel enclosure, ≈ 8 M³ / Min. pure fog, ≈ 18 ft. visual distance, ≈ 480 M³ fog during 60 minute operation to visualize airflow turbulence in Clean Rooms, ISO Suites and Barrier Isolators. One 80mm fog outlet with velocity control, volume control & wireless control. Fog Density of about 806 ml / minute is converted to dense fog at maximum fog volume setting. CRM-Apollo-50-Product-Sheet.pdf - [Apollo 150 Liquid Nitrogen Fogger, LN2 Fogger](https://cleanroommetrology.com/product/apollo-150-nitrogen-di-water-fogger/): Apollo 150 Nitrogen-Di-Water Smoke Studies Fogger with rolling, stainless steel enclosure, ≈ 24 M³ / Min. ultrapure fog, ≈ 25 ft. visual distance, ≈ 2880 M³ fog during typical 120 minute operation to visualize airflow turbulence in large Clean Rooms, ISO Suites and Barrier Isolators. Also Movie Stage Fog. Three 80mm fog outlets, fog velocity and volume control with optional wireless remote control. CRM-Apollo-150-Product-Sheet.pdf - [Apollo 100 Liquid Nitrogen Fogger, LN2 Fogger](https://cleanroommetrology.com/product/apollo-100-liquid-nitrogen-fogger-ln2-fogger/): Apollo 100 LN2 Ultrapure Fogger with rolling, stainless steel enclosure, ≈ 16 M³ / Min. ultrapure fog, ≈ 21 ft. visual distance, ≈ 1280 M³ fog during typical 80 minute operation cycle to visualize airflow turbulence in large Clean Rooms, ISO Suites and Barrier Isolators. Two 80mm fog outlets with velocity control and volume control. CRM-Apollo-100-Product-Sheet.pdf - [AFM40 Cleanroom Fogger](https://cleanroommetrology.com/product/afm40-cleanroom-fogger/): AFM40 Cleanroom Fogger is used in Smoke Studies and airflow visualization Studies. It produces about 2 cubic meters pure fog / minute for about 35 minutes and is produced with a 316L brushed stainless-steel enclosure and water cavity with two 80mm Fog Outlets. CRM-AFM40-Product-Sheet.pdf - [AFM35 Cleanroom Fogger for Airflow Visualization Studies](https://cleanroommetrology.com/product/afm35-cleanroom-fogger/): AFM35 Cleanroom Fogger for airflow visualization studies in clean rooms and ISO Suites. 316L brushed stainless steel enclosure, ≈ 1.4 M³ / Min. pure fog, ≈ 11-12 ft. visual distance, ≈ 63 M³ pure fog over a 45 minute operation for smoke studies in Clean Rooms, ISO Suites and Barrier Isolators. One 80mm fog outlet. CRM-AFM35-Product-Sheet.pdf - [AFM24 Cleanroom Fogger](https://cleanroommetrology.com/product/afm24-cleanroom-fogger/): AFM24 Cleanroom Fogger for Smoke Studies: stainless steel, ≈ 0.83 M³ / Min. pure fog, ≈ 8-9 ft. visual airflow distance, ≈ 37 M³ fog in 45 min. cycle, visualize airflow turbulence in 2x8' BSC, Bio-Safety Cabinet, Airflow Hood or Fume Hood, One 80mm fog outlet w/ velocity & volume control, Wireless control option plus 11 other fog accessory selections. CRM-AFM24-Product-Sheet.pdf - [Apollo 35 Liquid Nitrogen Fogger, LN2 Fogger](https://cleanroommetrology.com/product/apollo-35-liquid-nitrogen-fogger-ln2-fogger/): Apollo 35 Nitrogen-Di-Water Fogger with rolling, stainless steel enclosure, ≈ 5 M³ / Min. fog, ≈ 15 ft. visual distance, ≈ 225 M³ fog during typical 45 minute operation to visualize airflow turbulence in small Clean Rooms, ISO Suites and Barrier Isolators. One 80mm fog outlet with velocity control and volume control. CRM-Apollo-35-Product-Sheet.pdf - [Polystyrene Microsphere Beads CRM4208A](https://cleanroommetrology.com/product/polystyrene-microsphere-beads-crm4208a/): Polystyrene Microsphere Beads CRM4208A are NIST Traceable, particle size standards with accurate diameter, narrow size distribution to calibrate CNC and particle counters. - [Polystyrene Microsphere Beads CRM4250A](https://cleanroommetrology.com/product/polystyrene-microsphere-beads-crm4250a/): Polystyrene Microsphere Beads CRM4250A are NIST Traceable, particle size standards with accurate diameter, narrow size distribution to calibrate CNC and particle counters. - [Polystyrene Microsphere Beads CRM3450A](https://cleanroommetrology.com/product/polystyrene-microsphere-beads-crm3450a/): Polystyrene Microsphere Beads CRM3450A are NIST Traceable, particle size standards with accurate diameter, narrow size distribution to calibrate CNC and particle counters. - [Polystyrene Microsphere Beads CRM4316A](https://cleanroommetrology.com/product/polystyrene-microsphere-beads-crm4316a/): Polystyrene Microsphere Beads CRM4316A are NIST Traceable, particle size standards with accurate diameter, narrow size distribution to calibrate CNC and particle counters. - [Polystyrene Microsphere Beads CRM4013A](https://cleanroommetrology.com/product/polystyrene-microsphere-beads-crm4013a/): Polystyrene Microsphere Beads CRM4013A are NIST Traceable, particle size standards with accurate diameter, narrow size distribution to calibrate CNC and particle counters. - [Polystyrene Microsphere Beads CRM4009A](https://cleanroommetrology.com/product/polystyrene-microsphere-beads-crm4009a/): Polystyrene Microsphere Beads CRM4009A are NIST Traceable, particle size standards with accurate diameter, narrow size distribution to calibrate CNC and particle counters. - [Wireless Remote Controller](https://cleanroommetrology.com/product/wireless-remote-controller/): Remote On/Off, Airflow volume and velocity - [CRM35-5B Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm35-5b-dry-fluorescent-microspheres/): CRM35-5B Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max Green polymer particle, which have been dyed with bright, distinct green color. Fluoro-Max Green Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM36-4 Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm36-4-dry-fluorescent-microspheres/): CRM36-4 Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max Red polymer particle, which have been dyed with bright, distinct red color. Fluoro-Max Red Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM36-4B Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm36-4b-dry-fluorescent-microspheres/): CRM36-4B Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max Red polymer particle, which have been dyed with bright, distinct red color. Fluoro-Max Red Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM35-4B Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm35-4b-dry-fluorescent-microspheres/): CRM35-4B Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max Green polymer particle, which have been dyed with bright, distinct green color. Fluoro-Max Green Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM35-4 Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm35-4-dry-fluorescent-microspheres/): CRM35-4 Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max Green polymer particle, which have been dyed with bright, distinct green color. Fluoro-Max Green Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM35-3 Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm35-3-dry-fluorescent-microspheres/): CRM35-3 Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max Green polymer particle, which have been dyed with bright, distinct green color. Fluoro-Max Green Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM36-2 Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm36-2-dry-fluorescent-microspheres/): CRM36-2 Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max Red polymer particle, which have been dyed with bright, distinct red color. Fluoro-Max Red Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM36-2B Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm36-2b-dry-fluorescent-microspheres/): CRM36-2B Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max Red polymer particle, which have been dyed with bright, distinct red color. Fluoro-Max Red Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM35-2B Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm35-2b-dry-fluorescent-microspheres/): CRM35-2B Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max Green polymer particle, which have been dyed with bright, distinct green color. Fluoro-Max Green Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM35-2 Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm35-2-dry-fluorescent-microspheres/): CRM35-2 Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max Green polymer particle, which have been dyed with bright, distinct green color. Fluoro-Max Green Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM36-11 Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm36-11-dry-fluorescent-microspheres/): CRM36-11 Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max fluorescent polymer particle, which have been dyed with bright, distinct fluorescent color. Fluoro-Max Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM35-10B Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm35-10b-dry-fluorescent-microspheres/): CRM35-10B Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max fluorescent polymer particle, which have been dyed with bright, distinct fluorescent color. Fluoro-Max Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM35-9B Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm35-9b-dry-fluorescent-microspheres/): CRM35-9B Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max fluorescent polymer particle, which have been dyed with bright, distinct fluorescent color. Fluoro-Max Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM35-9 Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm35-9-dry-fluorescent-microspheres/): CRM35-9 Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max fluorescent polymer particle, which have been dyed with bright, distinct fluorescent color. Fluoro-Max Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM35-8B Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm35-8b-dry-fluorescent-microspheres/): CRM35-8B Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max fluorescent polymer particle, which have been dyed with bright, distinct fluorescent color. Fluoro-Max Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM35-8 Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm35-8-dry-fluorescent-microspheres/): CRM35-8 Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max fluorescent polymer particle, which have been dyed with bright, distinct fluorescent color. Fluoro-Max Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM35-7B Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm35-7b-dry-fluorescent-microspheres/): CRM35-7B Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max fluorescent polymer particle, which have been dyed with bright, distinct fluorescent color. Fluoro-Max Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM35-7 Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm35-7-dry-fluorescent-microspheres/): CRM35-7 Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max fluorescent polymer particle, which have been dyed with bright, distinct fluorescent color. Fluoro-Max Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM36-6B Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm36-6b-dry-fluorescent-microspheres/): CRM36-6B Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max Red polymer particle, which have been dyed with bright, distinct red color. Fluoro-Max Red Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM36-6 Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm36-6-dry-fluorescent-microspheres/): CRM36-6 Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max Red polymer particle, which have been dyed with bright, distinct red color. Fluoro-Max Red Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM35-6B Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm35-6b-dry-fluorescent-microspheres/): CRM35-6B Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max fluorescent polymer particle, which have been dyed with bright, distinct fluorescent color. Fluoro-Max Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM35-6 Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm35-6-dry-fluorescent-microspheres/): CRM35-6 Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max fluorescent polymer particle, which have been dyed with bright, distinct fluorescent color. Fluoro-Max Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM35-5 Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm35-5-dry-fluorescent-microspheres/): CRM35-5 Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max Green polymer particle, which have been dyed with bright, distinct green color. Fluoro-Max Green Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM36-5B Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm36-5b-dry-fluorescent-microspheres/): CRM36-5B Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max fluorescent polymer particle, which have been dyed with bright, distinct fluorescent color. Fluoro-Max Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM36-5 Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm36-5-dry-fluorescent-microspheres/): CRM36-5 Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max fluorescent polymer particle, which have been dyed with bright, distinct fluorescent color. Fluoro-Max Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM36-3 Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm36-3-dry-fluorescent-microspheres/): CRM36-3 Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max Red polymer particle, which have been dyed with bright, distinct red color. Fluoro-Max Red Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM36-3B Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm36-3b-dry-fluorescent-microspheres/): CRM36-3B Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max Red polymer particle, which have been dyed with bright, distinct red color. Fluoro-Max Red Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM35-3B Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm35-3b-dry-fluorescent-microspheres/): CRM35-3B Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max Green polymer particle, which have been dyed with bright, distinct green color. Fluoro-Max Green Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM35-14B Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm35-14b-dry-fluorescent-microspheres/): CRM35-14B Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max fluorescent polymer particle, which have been dyed with bright, distinct fluorescent color. Fluoro-Max Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM35-14 Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm35-14-dry-fluorescent-microspheres/): CRM35-14 Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max fluorescent polymer particle, which have been dyed with bright, distinct fluorescent color. Fluoro-Max Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM35-13B Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm35-13b-dry-fluorescent-microspheres/): CRM35-13B Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max fluorescent polymer particle, which have been dyed with bright, distinct fluorescent color. Fluoro-Max Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM35-13 Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm35-13-dry-fluorescent-microspheres/): CRM35-13 Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max fluorescent polymer particle, which have been dyed with bright, distinct fluorescent color. Fluoro-Max Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM35-12 Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm35-12-dry-fluorescent-microspheres/): CRM35-12 Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max fluorescent polymer particle, which have been dyed with bright, distinct fluorescent color. Fluoro-Max Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM35-12B Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm35-12b-dry-fluorescent-microspheres/): CRM35-12B Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max fluorescent polymer particle, which have been dyed with bright, distinct fluorescent color. Fluoro-Max Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM35-11 Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm35-11-dry-fluorescent-microspheres/): CRM35-11 Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max fluorescent polymer particle, which have been dyed with bright, distinct fluorescent color. Fluoro-Max Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM36-11B Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm36-11b-dry-fluorescent-microspheres/): CRM36-11B Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max fluorescent polymer particle, which have been dyed with bright, distinct fluorescent color. Fluoro-Max Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM35-11B Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm35-11b-dry-fluorescent-microspheres/): CRM35-11B Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max fluorescent polymer particle, which have been dyed with bright, distinct fluorescent color. Fluoro-Max Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [CRM35-10 Dry Fluorescent Microspheres](https://cleanroommetrology.com/product/crm35-10-dry-fluorescent-microspheres/): CRM35-10 Dry Fluorescent Microspheres is a Thermo Scientific™ Fluoro-Max Green polymer particle, which have been dyed with bright, distinct green color. Fluoro-Max Green Dry Fluorescent Particle are produced with polystyrene material at a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C) - [AFM35 Smoke Studies Fogger Extended Warranty](https://cleanroommetrology.com/product/afm35-extended-warranty/): AFM35 Extended Warranty on Parts and Labor (2 years from ship date of product to customer) - [60mm x 0.6mm Standard Transparent Fog Rake](https://cleanroommetrology.com/product/60mm-x-0-6mm-standard-transparent-fog-rake-fitted-with-90-outlet-direction-blue-nozzles-pom-c-blue/): 60mm x 0.6mm DeluxeTransparent Fog Rake, fitted with 90° Outlet Direction Blue Nozzles (POM-C, BLUE) allows connection to 5 Meter Hose to convert the stream of fog from fog hose to a 0.6M wide fog pattern to visualize wide areas such as hallways or cleanrooms providing a 90 degree fog outlet. Can be upgraded to a extended deluxe version. - [80mm x 0.6M Standard Transparent Fog Rake, fitted with 90° Outlet Direction Blue Nozzles (POM-C, BLUE)](https://cleanroommetrology.com/product/80mm-x-0-6mm-standard-transparent-fog-rake-fitted-with-90-outlet-direction-blue-nozzles-pom-c-blue/): 80mm x 0.6mm Deluxe Transparent Fog Rake, fitted with 90° Outlet Direction Blue Nozzles (POM-C, BLUE) - [Apollo 150 LN2 Ultrapure Fogger Extended Warranty](https://cleanroommetrology.com/product/apollo-150-ln2-extended-warranty/): Apollo 150 LN2 Ultrapure Fogger Extended Warranty on Parts and Labor (2 years from ship date of product to customer) - [Apollo 100 LN2 Ultrapure Fogger Extended Warranty](https://cleanroommetrology.com/product/apollo-100-ln2-extended-warranty/): Apollo 100 LN2 Ultrapure Fogger Extended Warranty on Parts and Labor (2 years from ship date of product to customer) - [Apollo 35-4 LN2 Extended Warranty Certificate](https://cleanroommetrology.com/product/apollo-35-4-ln2-extended-warranty-certificate/): Apollo 35-4 LN2 Extended Warranty Certificate (2 years from ship date) PDF Certificate will ship via email and hard copy with fogger - [AFM24 Smoke Studies Fogger Extended Warranty](https://cleanroommetrology.com/product/afm24-extended-warranty/): AFM24 Extended Warranty on Parts and Labor (2 years from ship date of product to customer) - [AFM Cube Smoke Studies Fogger Extended Warranty](https://cleanroommetrology.com/product/afm-cube-extended-warranty/): AFM Cube Cleanroom Fogger Extended Warranty on Parts and Labor (2 years from ship date of product to customer) - [Apollo 50 LN2 Ultrapure Fogger Extended Warranty](https://cleanroommetrology.com/product/apollo-50-4-ln2-extended-warranty/): Apollo 50 LN2 Ultrapure Cleanroom Fogger Extended Warranty on Parts and Labor (2 years from ship date of product to customer) - [AFM40 Cleanroom Fogger Extended Warranty](https://cleanroommetrology.com/product/afm40-extended-warranty/): AFM40 Cleanroom Fogger Extended Warranty on Parts and Labor (2 years from ship date of product to customer) - [Quad Adaptor](https://cleanroommetrology.com/product/quad-adaptor/): 1 IN 4 OUT Y-PATTERN SPLITTER FOR SPLITTING ONE TO FOUR HOSES ENABLING FOGGING PARALLELY AT FOUR VISUALIZATION SPOTS. - [Foam Lined Accessory Storage Case](https://cleanroommetrology.com/product/foam-lined-accessory-storage-case/): Accessory Roll Case -Plastic with Foam Lining Roll Case - [T Kit- T Pattern Splitter with Deluxe 80mm Fog Rakes fitted with 90° outlet direction nozzles.](https://cleanroommetrology.com/product/t-pattern-splitter-with-2-x-80mm-fog-rakes/): T-PATTERN SPLITTER FOR CONFIGURATING OF A 1.300 mm T-PATTERN FOG RAKE VERSION OF 80 mm OD (TOGETHER WITH TWO FL.650.80-STR FOG RAKE ELEMENTS) including 80 x 1.300 mm FOG RAKE T-PATTERN VERSION, TRANSPARENT, FITTED WITH 90° OUTLET DIRECTION NOZZLES (POM-C, BLUE) - [Y Pattern Splitter with Butterfly Valves](https://cleanroommetrology.com/product/throttle-y-pattern-splitter-with-valves/): Y-PATTERN SPLITTER WITH ADDITIONAL BUTTERFLY VALVE IN EACH OUTGOING TUBE FOR SPLITTING ONE TO TWO HOSES ENABLING A 0 TO 100 % OUTPUT ADJUSTMENT AND PARALLEL WORKING AT TWO VISUALIZATION SPOTS. COMING WITH SHORT HOSE CONNECTING AT FOG PORT OUTLET(S) TO Y-SPLITTER. - [350 mm Broad Flat Fog Output Nozzle for Under Doorways](https://cleanroommetrology.com/product/350-mm-broad-flat-fog-output-nozzle-for-under-doorways/): 350 mm BROAD FLAT FOG OUTPUT NOZZLE FOR UNDER DOORWAYS WITH INSIDE BLADE STRUCTURE FOR A HOMOGENEOUS FOG PICTURE - [Fogger Maintenance Kit, (Hand H2O Drain + 115Vac Air Dryer)](https://cleanroommetrology.com/product/fogger-maintenence-kit-hand-h2o-drain-115vac-air-dryer/): The Fogger Maintenance kit is used with Decontamination and Smoke Studies Foggers after fogging to drain the remaining water or solutions from the reservoir, and dry the cavity for storage. This regular maintenance allows for prevention of bio-contamination growth in storage. Fogger Maintenance Kit Includes one Hand pump used to easily drain the majority of water from the cavity without picking up the fogger upon completing tests one Air dryer  used to evaporate any remaining water in cavity, hoses, and accessories prior to storing. Use Dryer on LOW/COOL settings. - [LED BOOST KIT- GEN 2](https://cleanroommetrology.com/product/led-boost-kit-gen-2/): DUAL LIGHT SOURCE KIT TO ESTABLISH HIGHER CONTRAST CONSISTING OF (1) LIGHT SOURCE #1 (360 POWERFUL LEDS 0,5 W SMD 2835 COLD WHITE (CW), PROVIDES A HOMOGENEOUS LIGHT, DIMMER ELECTRONIC (ADJUSTABLE), STROBE EFFECT, CONTROL VIA DMX, QUICK SELECT POTENTIOMETER FOR BRIGHTNESS CONTROL, FLICKER-FREE, VERY HIGH COLOR RENDERING INDEX, USABLE HORIZONTAL LYING OR SUSPENDED OR ON TRIPOD LED) AND (2) LIGHT SOURCE #2 (LIGHT BAR VECTOR PIXEL BAR WITH PIXEL CONTROL AND 18x15W LEDs, RGBWA COLOUR MIXING, 45° BEMA ANGLE, 10/28/90/100 DMX CHANNELS) - [BSC Kit](https://cleanroommetrology.com/product/bsc-kit/): BSC Extended Fog Wand-Dual 60mm Fog Rakes with Connector, (no end caps or blue nozzles) - [80mm x 1.3M Deluxe Transparent Fog Rake, fitted with 90° Outlet Direction Blue Nozzles (POM-C, BLUE)](https://cleanroommetrology.com/product/80mm-x-1-3m-deluxe-transparent-fog-rake-fitted-with-90-outlet-direction-blue-nozzles-pom-c-blue/): 80mm x 1.3M Deluxe Transparent Fog Rake, fitted with 90° Outlet Direction Blue Nozzles (POM-C, BLUE) - [60mm x 1.3M Deluxe Transparent Fog Rake](https://cleanroommetrology.com/product/60mm-x-1-3m-deluxe-transparent-fog-rake-fitted-with-90-outlet-direction-blue-nozzles-pom-c-blue/):   60mm x 1.3M Deluxe Transparent Fog Rake fitted with Direction Nozzles allows connection to 5 Meter Hose to convert the stream of fog from a fog hose to a 1.3M wide fog pattern to visualize wide areas such as hallways or cleanrooms providing a 90° Outlet for air flow visualization. - [80mm Transparent Rising Tube](https://cleanroommetrology.com/product/80mm-transparent-fog-tube/): 80mm x 650mm Transparent Rising Tube With single slit connector extends the fog outlet upwards for higher fog dispersal. NO Holes or End Caps - [Hose Kit](https://cleanroommetrology.com/product/hose-kit/): 80mm to 60mm hose reducing kit. Our Hose Kit includes 1M X 80mm Hose + 4M x 60mm Hose + 1 X Single 60mm Fog Rake with 90 Degree outlet direction nozzles + Kit Adaptors. Compatible with all our foggers.     - [80mm Flexible Fog Hose](https://cleanroommetrology.com/product/80mm-flexible-fog-hose/): The 5 Meter x 80mm Flexible fog hose comes with end cuffs and connects directly into the fogger outlet. This hose is compatible with all foggers and accessories such as 80mm Fog Curtain Wand, Y adaptors, T adaptor, 350mm Nozzle, and Quad Adaptor. Compatible with all our foggers.   - [Box, Pack and Handling- Wafer Standards and Particles](https://cleanroommetrology.com/product/box-pack-and-handling-wafer-standards-and-particles/): Box, Pack and Handling- Small, Medium or Large carrier box. - [Polystyrene Microsphere Beads CRM4314A](https://cleanroommetrology.com/product/polystyrene-microsphere-beads-crm4314a/): Polystyrene Microsphere Beads CRM4314A are NIST Traceable, particle size standards with accurate diameter, narrow size distribution to calibrate CNC and particle counters. - [Polystyrene Microsphere Beads CRM4311A](https://cleanroommetrology.com/product/polystyrene-microsphere-beads-crm4311a/): Polystyrene Microsphere Beads CRM4311A are NIST Traceable, particle size standards with accurate diameter, narrow size distribution to calibrate CNC and particle counters. - [Polystyrene Microsphere Beads CRM4310A](https://cleanroommetrology.com/product/polystyrene-microsphere-beads-crm4310a/): Polystyrene Microsphere Beads CRM4310A are NIST Traceable, particle size standards with accurate diameter, narrow size distribution to calibrate CNC and particle counters. - [Polystyrene Microsphere Beads CRM4280A](https://cleanroommetrology.com/product/polystyrene-microsphere-beads-crm4280a/): Polystyrene Microsphere Beads CRM4280A are NIST Traceable, particle size standards with accurate diameter, narrow size distribution to calibrate CNC and particle counters. - [Polystyrene Microsphere Beads CRM4270A](https://cleanroommetrology.com/product/polystyrene-microsphere-beads-crm4270a/): Polystyrene Microsphere Beads CRM4270A are NIST Traceable, particle size standards with accurate diameter, narrow size distribution to calibrate CNC and particle counters. - [Polystyrene Microsphere Beads CRM4260A](https://cleanroommetrology.com/product/polystyrene-microsphere-beads-crm4260a/): Polystyrene Microsphere Beads CRM4260A are NIST Traceable, particle size standards with accurate diameter, narrow size distribution to calibrate CNC and particle counters. - [Polystyrene Microsphere Beads CRM4240A](https://cleanroommetrology.com/product/polystyrene-microsphere-beads-crm4240a/): Polystyrene Microsphere Beads CRM4240A are NIST Traceable, particle size standards with accurate diameter, narrow size distribution to calibrate CNC and particle counters. - [Polystyrene Microsphere Beads CRM4230A](https://cleanroommetrology.com/product/polystyrene-microsphere-beads-crm4230a/): Polystyrene Microsphere Beads CRM4230A are NIST Traceable, particle size standards with accurate diameter, narrow size distribution to calibrate CNC and particle counters. - [Polystyrene Microsphere Beads CRM4225A](https://cleanroommetrology.com/product/polystyrene-microsphere-beads-crm4225a/): Polystyrene Microsphere Beads CRM4225A are NIST Traceable, particle size standards with accurate diameter, narrow size distribution to calibrate CNC and particle counters. - [Polystyrene Microsphere Beads CRM4215A](https://cleanroommetrology.com/product/polystyrene-microsphere-beads-crm4215a/): Polystyrene Microsphere Beads CRM4215A are NIST Traceable, particle size standards with accurate diameter, narrow size distribution to calibrate CNC and particle counters. - [Polystyrene Microsphere Beads CRM4212A](https://cleanroommetrology.com/product/polystyrene-microsphere-beads-crm4212a/): Polystyrene Microsphere Beads CRM4212A are NIST Traceable, particle size standards with accurate diameter, narrow size distribution to calibrate CNC and particle counters. - [Polystyrene Microsphere Beads CRM4220A](https://cleanroommetrology.com/product/polystyrene-microsphere-beads-crm4220a/): Polystyrene Microsphere Beads CRM4220A are NIST Traceable, particle size standards with accurate diameter, narrow size distribution to calibrate CNC and particle counters. - [Polystyrene Microsphere Beads CRM4209A](https://cleanroommetrology.com/product/polystyrene-microsphere-beads-crm4209a/): Polystyrene Microsphere Beads CRM4209A are NIST Traceable, particle size standards with accurate diameter, narrow size distribution to calibrate CNC and particle counters. - [Polystyrene Microsphere Beads CRM4207A](https://cleanroommetrology.com/product/polystyrene-microsphere-beads-crm4207a/): Polystyrene Microsphere Beads CRM4207A are NIST Traceable, particle size standards with accurate diameter, narrow size distribution to calibrate CNC and particle counters. - [Polystyrene Microsphere Beads CRM4206A](https://cleanroommetrology.com/product/polystyrene-microsphere-beads-crm4206a/): Polystyrene Microsphere Beads CRM4206A are NIST Traceable, particle size standards with accurate diameter, narrow size distribution to calibrate CNC and particle counters. - [Polystyrene Microsphere Beads CRM4204A](https://cleanroommetrology.com/product/polystyrene-microsphere-beads-crm4204a/): Polystyrene Microsphere Beads CRM4204A are NIST Traceable, particle size standards with accurate diameter, narrow size distribution to calibrate CNC and particle counters. - [Polystyrene Microsphere Beads CRM4210A](https://cleanroommetrology.com/product/polystyrene-microsphere-beads-crm4210a/): Polystyrene Microsphere Beads CRM4210A are NIST Traceable, particle size standards with accurate diameter, narrow size distribution to calibrate CNC and particle counters. - [Polystyrene Microsphere Beads CRM4205A](https://cleanroommetrology.com/product/polystyrene-microsphere-beads-crm4205a/): Polystyrene Microsphere Beads CRM4205A are NIST Traceable, particle size standards with accurate diameter, narrow size distribution to calibrate CNC and particle counters. - [Polystyrene Microsphere Beads CRM4203A](https://cleanroommetrology.com/product/polystyrene-microsphere-beads-crm4203a/): Polystyrene Microsphere Beads CRM4203A are NIST Traceable, particle size standards with accurate diameter, narrow size distribution to calibrate CNC and particle counters. - [Polystyrene Microsphere Beads CRM4025A](https://cleanroommetrology.com/product/polystyrene-microsphere-beads-crm4025a/): Polystyrene Microsphere Beads CRM4025A are NIST Traceable, particle size standards with accurate diameter, narrow size distribution to calibrate CNC and particle counters. - [Polystyrene Microsphere Beads CRM4202A](https://cleanroommetrology.com/product/polystyrene-microsphere-beads-crm4202a/): Polystyrene Microsphere Beads CRM4202A are NIST Traceable, particle size standards with accurate diameter, narrow size distribution to calibrate CNC and particle counters. 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