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 Gastec dosimeter tubes are on the spot detector tubes, used to obtain a time weighted average (TWA) parts per million (PPM) concentration.   

Use for sampling periods from 15 minutes to 24 hours.  Easy to use and precise.  All dosimeter tubes exceed NIOSH and OSHA performance criteria for TWA detector tubes. 

3D Ammonia 2.5-1000 0.5-10 3 Temp Correction 25
3DL Ammonia 0.1-10 1-10 2 Temp Correction

Range 3-300

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