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UMEx 200 Passive Samplers

The lightweight UMEx 200 clips in the breathing zone for easy personal sampling. The sample medium (tape treated with triethanolamine [TEA]) and a "blank/correction" section of tape are contained in one sampler saving time and money. Samplers are provided in individual aluminiumised pouches that can be used to transport the sampler to a laboratory. The label on the outside of each pouch contains the shelf-life date for easy inventory management.

UMEx 200 SO2/NO2 Passive Sampler
  • Same chemistry as active OSHA Method ID-182
  • Ready to use
  • Accurate, reliable personal sampling
  • Lightweight sampler clips easily in the breathing zone
  • Economical , low cost, single use sampler
  • Safe — no glass or chemical liquids in the sampler
  • No pump or training required
  • Sample medium and blank/correction in one unit
  • Accurately measures personal workplace exposure to sulphur dioxide and/or nitrogen dioxide from 15 minutes to 8 hours (Not suitable for new STEL of 0.25 ppm)
  • 3-week sample storage at ambient temperature

SKC Research has validated the UMEx 200 Passive Sampler for 24 hour ambient air sampling of sulphur dioxide and nitrogen dioxide to complement federal EPA reference methods. The validated concentration range for sulphur dioxide is 0.4 to 8 ppm (15 minutes to 24 hours); nitrogen dioxide is 0.05 to 8 ppm (15 minutes to 24 hours).

Applications for Sulphur dioxide
  • Intermediate in the manufacture of sulphuric acid
  • Bleaching agent
  • Disinfectant
  • Fumigant
  • Solvent
  • Refrigerant
  • Food preservative
  • Reagent in the manufacture of magnesium, sodium sulphite and other chemicals
Applications for Nitrogen dioxide
  • Agricultural silos
  • Arc or gas welding, especially in confined space
  • Electroplating plants
  • Food and textile bleaching
  • Jewelery manufacturing
  • Nitric acid production
  • Nitrogen fertiliser production
  • Nitro-explosive production
  • Pickling plants
Sampling Rate    SO2: 15.2 ml/min with a RSD (Relative Standard Deviation) of 16.5%
NO2: 17.3 ml/min with a RSD of 11.4%
Validation Range    SO2: 0.4 to 8 ppm
NO2 0.051 to 8.5 ppm
Lower Detection Limits    SO2:
15 minutes: 1.8 ppm
8 hrs: 52 ppb
24 hrs: 17.4 ppb

15 minutes: 0.2 ppm
8 hours: 0.3 ppb
24 hours: 2 ppb
Shelf-life    18 months from date of manufacture at ambient temperature
Analysis    Solvent extraction and ion chromatography with conductivity detection
Accuracy    SO2: ± 30%
NO2: ± 27%
Storage    Before use: ambient temperature
After use: Analyze within 3 weeks. Can be stored at ambient temperature or at <4°C (39.2°F)
Temperature Effects    SO2: No effect on sampling rate between 20 and 25°C
NO2: No effect on sampling rate between 22 and 40°C
Humidity Effects    No effect from 20 to 80% relative humidity (RH)
Wind Effects    No effect from 5 to 100 cm/s
Interferences    None identified
Dimensions    8.6 x 2.8 x 0.89 cm (3.4 x 1.1 x 0.35 inches)
Weight    10.9 g (0.38 oz)
UMEx 200 Passive Samplers
Description Pack Size Part Number
UMEx 200 Passive Sampler for Sulphur Dioxide and/or Nitrogen Dioxide, individually packaged in aluminised pouch.

UMEx 200 samplers are designed for single use only. DO NOT reuse UMEx 200 samplers.

Limited shelf-life.
Treated Tape, for QC (quality control) purposes only 25 P20098
Description Pack Size Part Number  
Stand for Indoor Sampling Each 690-302  690-302 Stand for mounting passive samplers for Indoor Sampling 
Shelter for Outdoor Sampling Each 690-303  690-303 Shelter for mounting passive samplers for Outdoor Sampling 
Stand for Indoor Sampling


Shelter for Outdoor Sampling


UMEX 200 SO2 Instructions    UMEX 200 NO2 Instructions

UMEx 200 SO2


UMEx 200 NO2