Choosing a Sampler

Choosing a Sampler

Which diffusive monitor should I use?

Assay Technology offers more diffusive monitors for more chemicals than any other manufacturer! This is great news for those who want easy, accurate methods for personal monitoring. Check out our simple guide below to find the right monitor for your needs.


Click on the item number to go to the Product Summary for each badge.  Most information can be obtained from the Product Summary and the Sampling Guide.

Acetic Acid 543
Acrolein – Recommend for PEL monitoring. 592
Aldehydes – Use for PEL and STEL for most aldehydes, including Formaldehyde and Acetaldehyde. 571
Aldehydes, Very Fast Sampling Rate

– Recommended for Glutaraldehyde and o-Phthalaldehyde.

Amines, Organic – Primary and Secondary Amines. 585
Ammonia 584
Anesthetic Gases – Choose up to three. 574
Ethylene Oxide – Use for PEL and STEL. 555
Ethyl-2-Cyanoacrylate – Special handling required.  Read instructions carefully and call ahead. 595
Hydrogen Peroxide 587
Methanol 545
Mercury Vapor – Be careful when handling in dusty environments.  Read instructions carefully. 593
Nitrogen Dioxide 594
Nitrous Oxide – Follow handling instructions carefully. 575
Ozone – Use for PEL. 586
Phenol 596




Assay Technology provides three different Organic Vapor monitors that can sample for over 100 Organic Vapors.  Why three?

Think of it like three pumps with three different flow rates, but they won’t break nor will they have to be calibrated.

The slow flow pump is good for long sampling times at high concentrations.  The chemicals are likely to be those with high PELs, like Acetone and Ethanol.  See the 546 badge.

The fast flow pump is best for short sampling times or very low concentrations, like measuring Indoor Air Quality and chemicals with low PELs, like Benzene.  See the 525.

The medium flow pump is for everything else.  See the most versatile, most popular 566.


Our most popular, versatile monitor.  Use for most sampling situations.

525 TraceAir® II:

Our fastest sampler for short term or IAQ sampling.  If concentration is low enough, the 525 is OK for TWA or longer monitoring.


Our sampler with the highest capacity.  Best used when monitoring for more than 4 hours for  chemicals with PELs greater than 200 ppm.  If reporting limit is OK, 546 will work for all chemicals that work on the 566 or 525.

While all three can work for almost every chemical, choosing which one will work best for you depends on the

  • Chemical
  • Sampling Conditions
  • Regulatory Limits

For assistance choosing which is best for your situation: Organic Vapor Monitor Overview.


Should/can I use a badge?

Our badges work for hundreds of chemicals for STEL, PEL, and IAQ monitoring; however, badges are not for every chemical or every situation.  See our page on the advantages/disadvantages of diffusive monitors for more information.

Contact our customer service department for assistance if you do not see your chemical on our site or want help developing a monitoring plan.