Gastec 9L 快速气体检测管NO2(0.5~125ppm)

Indicator: 
Measuring Range: 
+ 0.5 to 30 ppm, Number of Pump Strokes 2
+ 30 to 125 ppm, Number of Pump Strokes 1
Sampling Time:  per pump stroke
Colour Change: White → Yellowish Orange
Reaction Principle: NO2 + o-Tolidine → Yellowish orange product
Coefficient of Variation: 10% (for 0.5 to 3 ppm), 5% (for 3 to 30 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Detail

Catalog

Manual

Manual tube

Performance
Measuring Range
0.5 to 30 ppm 30 to 125 ppm
Number of Pump Strokes
2 1
Correction Factor
1 By Scale
Sampling Time 30 seconds per pump stroke
Detecting Limit 0.1 ppm (n=2)
Colour Change White → Yellowish Orange
Reaction Principle NO2 + o-Tolidine → Yellowish orange product
Coefficient of Variation 10% (for 0.5 to 3 ppm), 5% (for 3 to 30 ppm)
Shelf Life 3 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
Ammonia   No No
Carbon monoxide   No No
Carbon dioxide   No No
Nitric oxide 50 ppm Unclear demarcation Pale red
Bromine, Chlorine 1/5 times + Yellowish orange
sulphur dioxide 10 ppm (Bleaching) No
Organic solvents   No No
Other substance measurable with this detector tube
Substance Correction Factor No. of pump strokes Measuring Range
Iodine 0.4 2 0.2 to 12 ppm
Calibration gas generation Permeation tube method
TLV-TWA TLV-STEL Explosive range
0.2 ppm(2014) - -

 

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