Gastec 120 快速芳烃检测管(0.4~200 ppm)

Indicator: 2 to 100 ppm 
Measuring Range: 
+ 0.4 to 2 ppm , Number of Pump Strokes 2 to 5
+ 2 to 100 ppm , Number of Pump Strokes 1
+ 100 to 200 ppm , Number of Pump Strokes 1/2
Sampling Time: 1.5 minute per pump stroke
Colour Change: White → Brown 
Reaction Principle: Aromatic Hydrocarbons + I2O5 + H2SO4 → I2
Coefficient of Variation: 10% (for 2 to 20 ppm), 5% (for 20 to 100 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Detail

Catalog

Manual

Performance
Measuring Range
0.4 to 2 ppm 2 to 100 ppm 100 to 200 ppm
Number of Pump Strokes
2 to 5 1 1/2
Correction Factor 1/2 to 1/5 1 2
Sampling Time 1.5 minutes per pump stroke
Detecting Limit 0.2 ppm (n=5)
Colour Change White → Brown
Reaction Principle Aromatic Hydrocarbons + I2O5 + H2SO4 → I2
Coefficient of Variation 10% (for 2 to 20 ppm), 5% (for 20 to 100 ppm)
Shelf Life 3 Years
Corrections for temperature & humidity Unnecessary
 
Calibration gas generation Diffusion tube method
TLV-TWA TLV-STEL Explosive range
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