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UMEx 300 Passive Sampler for Ammonia

Orderable Items Sample workplace ammonia accurately and reliably with SKC UMEx 300 Passive Samplers. It's as easy as clip, sample, ship!

  • Free media blank included

  • Chemistry similar to active Methods OSHA ID-188 and NIOSH 6016

  • Accurate, reliable occupational sampling and environmental monitoring

  • No assembly required — simply move slide to sample

  • Lightweight and clips easily in the breathing zone

  • Economical
    • No pump or training required
    • Low-cost sampler
    • Sample medium and blank in one unit

  • Safe — no glass or sulfuric acid liquid in the sampler

  • No particulate interference

  • Enhanced sensitivity with 39.92 ml/min uptake rate for 15-minute to 24-hour sampling

  • Stand accessory available for environmental monitoring




Ammonia is one of the most commonly produced industrial chemicals in the United States. Workers can be exposed to ammonia in the following industries:

  • Agricultural (fertilizers)
  • Janitorial services (cleaners)
  • Food and beverage (refrigeration and fermentation)
  • Remediation
  • Fuel
  • Manufacturing
    • Plastics
    • Explosives
    • Pesticides
    • Textiles
    • Dyes



Performance Profile

Sampling Rate 39.92 ml/min with a relative standard
Validated Concentration Range 0.1 to 100 ppm
Analysis Method Solvent extraction and ion chromatography with conductivity detection for the ammonium ion or visible absorption spectrometry
Lower Detection Limits 15 min: 2.4 ppm
8 hrs: 0.075 ppm
24 hrs: 0.025 ppm
Shelf-life 9 mos from date of manufacture at < 39.2 F (4 C)

Before use: < 39.2 F (4 C)

After use: Ambient temperature [72 F (22 C)] or at < 39.2 F (4 C) and analyze within 3 week

Accuracy ± 23.4%
Temperature Effects No effect on sampling rate from 22 to 40 C
Humidity Effects No effect from 20 to 80% relative humidity (RH)
Wind Velocity Effects No effect from 5 to 100 cm/sec
Interferences None identified
Dimensions 3.4 x 1.1 x 0.35 in (8.6 x 2.8 x 0.89 cm)
Weight 0.38 oz (10.9 gm)
Slide Cover Pink



The SKC UMEx 300 Passive Sampler accurately and reliably samples workplace exposure to ammonia. With its 39.92 ml/min sampling rate, the sensitive UMEx 300 detects ammonia to 2.4 ppm for a 15-minute sample, 0.075 ppm for an eight-hour sample, and 0.025 ppm for a 24-hour sample. Each sampler contains a length of sulfuric acid-treated tape and a blank section of tape built into the sampler. Analysis is by ion chromatography (IC) with conductivity detection for the ammonium ion or visible absorption spectrometry.


So easy to use

Clip the 500-300 onto a worker


Open the cover to sample with the 500-300


ship the 500-300 to a lab for analysis