Gastec 11HA 氮氧化物比色法气体检测管 NO + NO2(50-2500 ppm)

Indicator: 100 ~ 2500 ppm
Measuring Range: 50 to 2500 ppm, Number of Pump Strokes 1
Sampling Time: 1.5 minute per pump stroke
Colour Change: White → Green
Reaction Principle: NO + Cr6+ + H2SO4 →NO2, NO2 + (C6H5)2NH → Green product
Coefficient of Variation: 10% (for 50 to 400 ppm), 5% (for 400 to 2500 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Detail

Catalog

Manual

Manual tube

Performance
Measuring Range 50 to 2500 ppm
Number of Pump Strokes 1
Correction Factor 1
Sampling Time 1.5 minutes per pump stroke
Detecting Limit 10 ppm (n=1)
Colour Change White → Green
Reaction Principle NO + Cr6+ + H2SO4 →NO2
NO2 + (C6H5)2NH → Green product
Coefficient of Variation 10% (for 50 to 400 ppm), 5% (for 400 to 2500 ppm)
Shelf Life 2 Years
Corrections for temperature & humidity Unnecessary
Store the tubes at cool and dark place.
Possible coexisting substances and their interferences (NOTE)
Substance Concentration Interference Change colour by itself to
Hydrogen chloride 500 ppm Unclear demarcation Bluish purple ( 100 ppm)
Ozone 200 ppm Unclear demarcation two layers Brown
sulphur dioxide, Hydrogen sulphide   No No
Calibration gas generation High pressure gas cylinder method
TLV-TWA TLV-STEL Explosive range
NO2: 0.2 ppm(2014)
NO: 25 ppm(2014)
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