Gastec 10 快速氮氧化物测量探测管NO和NO2(2.5-200ppm)

Indicator: 2.5 to 200 ppm (NO2), 5 to 200 ppm (NO)
Measuring Range: 
+ 2.5 ~ 5 ppm (NO), Number of Pump Strokes 2
+ 5 ~ 200 ppm (NO), Number of Pump Strokes 1
+ 5 ~ 200 ppm (NO2), Number of Pump Strokes 1
Sampling Time: 45 seconds per pump stroke
Colour Change: White → Yellowish orange
Reaction Principle: 
+ NO2 tube: NO2 + o-Tolidine → Yellowish orange product
+ NO tube:NO + Cr6+ + H2SO4 →NO2, NO2 + o-Tolidine → Yellowish orange product
Coefficient of Variation: 
+ NO2 tube: 10% (for 2.5 to 20 ppm), 5% (for 20 to 200 ppm)
+ NO tube:10% (for 5 to 20 ppm), 5% (for 20 to 200 ppm)
Nr. of tests: 5
Pump: GV-100S/110S

Detail

Catalog

Manual

Manual tube

Performance
Name of Gas
Nitrogen Dioxide
(NO2)
Nitric oxide
(NO)
Nitric oxide
(NO)
Measuring Range
2.5 to 200 ppm 2.5 to 5 ppm 5 to 200 ppm
Number of Pump Strokes
1 2 1
Correction Factor
1 1/2 1
Detecting Limit
0.5 ppm (n=1) 1 ppm (n=2) 1 ppm (n=2)
Sampling Time 45 seconds per pump stroke
Colour Change White → Yellowish orange
Reaction Principle NO2 tube:
NO2 + o-Tolidine → Yellowish orange product
NO tube:
NO + Cr6+ + H2SO4 →NO2
NO2 + o-Tolidine → Yellowish orange product
Coefficient of Variation NO2 tube: 10% (for 2.5 to 20 ppm), 5% (for 20 to 200 ppm)
NO tube:10% (for 5 to 20 ppm), 5% (for 20 to 200 ppm)
Shelf Life 3 Years
Corrections for temperature & humidity NO2 tube:Unnecessary
NO tube:Temperature correction is necessary
Store the tubes at cool and dark place.
Possible coexisting substances and their interferences (NOTE)
For the NO2 tube
Substance Concentration Interference Change colour by itself to
Nitric Oxide   No Red(entrance of the detecting layer)
Hydrogen chloride   Unclear demarcation No
Ozone, Halogens,
Chlorine dioxide
1/5 +20% Yellowish orange
Sulphur dioxide 50 ppm Unclear demarcation No
Possible coexisting substances and their interferences (NOTE)
For the NO tube
Substance Concentration Interference Change colour by itself to
Hydrogen chloride   No No
Ozone, Halogens, Chlorine dioxide   No No
Sulphur dioxide   No No
Nitrogen dioxide   No No
Calibration gas generation Permeation tube method
TLV-TWA TLV-STEL Explosive range
NO2: 0.2 ppm(2014)
NO: 25 ppm(2014)
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