Sulfur Dioxide/Nitrogen Dioxide Passive Sampler:  UMEx 200

The SKC UMEx 200 Passive Sampler effectively collects sulfur dioxide (SO2) and/or nitrogen dioxide (NO2). The sample medium (tape impregnated with triethanolamine [TEA]) and a "blank/correction" section of tape are contained in one sampler saving time and money. The lightweight UMEx 200 clips in the breathing zone for easy personal sampling.

  • Lightweight UMEx 200 clips in the breathing zone
  • Sulfur Dioxide/Nitrogen Dioxide Passive Sampler


Sampling rate SO2: 15.1 ml/min with a relative standard deviation of 16.7%
NO2: 12.83 ml/min with a relative standard deviation of 13.4%
Validated Concentration Range for SO2 and/or NO2 0.4 to 8 ppm
Analysis Method for SO2 and/or NO2 Solvent extraction and ion chromatography with conductivity detection
Lower Detection Limits for SO2 and/or NO2 15 minutes: 2 ppm
8 hours: 0.1 ppm
Shelf-life 18 months from date of manufacture at ambient temperature
Storage Before use: Ambient temperature
After use: Analyze within 3 weeks. Can be stored at ambient temperature or at < 39.2 F (4 C)
Accuracy for SO2 and/or NO2 ± 30%
Temperature Effects No effect on sampling rate between 20 and 25 C
Humidity Effects No effect from 20 to 80% relative humidity
Wind Effects No effect from 0.05 to 1.0 m/s
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 Yellow

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