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Hand-Held Flue Gas Analysers
Portable Flue Gas Analysers
Continuous Emission Monitors (CEM's)
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Pressure & Flow Measurement : AIR
Pressure & Flow Measurement : LIQUID
Temperature Measurement
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Biogas-/ Syngas Analysis
Engine Exhaust Gas Analysis
Mercury Monitoring
Source / Stack Testing
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  Products > Gas Detectors > Sub-Products > Gas Detector Tubes > Long Term Detector Tubes

Nitrogen dioxide NO2 NO.9DL
 Performance
Measuring Range
 0.01 to 3.0 ppm
Sampling Hours
 1 to 24 hours
Detecting Limit
 0.01 ppm
Color Change
 White ---> Green
Reaction Principle ABTS + NO2 Green product
Coefficient of Variation 10% (for 0.01 to 3.0 ppm-hr)
Shelf Life 1 Years
Corrections for temperature & humidity Unnecessary
Store the tubes in the refrigerator to keep at 10oC (50oF) or below.

 Possible coexisting substances and their interferences
Substance
  Concentration
  Interference Change color by itself

 Carbon monoxiide

 -
 No effect
 No discoloration (10 ppm)
 Chlorine
 0.07 ppm > No discoloration (0.07 ppm)
 Ozone 0.045 ppm > No discoloration (0.045 ppm)
 Sulfur dioxide 0.1 ppm > No discoloration (0.1 ppm)
 Carbon dinoxiide 600 ppm > No discoloration (600 ppm)
 Formaldehyde 0.1 ppm > No discoloration (0.1 ppm)

Calibration gas generation Permeation tube method

TLV-TWA
 TLV-STEL
 Explosive range
3ppm 5ppm -

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