Gastec 123L 二甲苯检测管 C6H4(CH3)2(2~200ppm)

Indicator:  2 to100 ppm
Measuring Range:
+ 2 to100 ppm, Number of Pump Strokes 2
+ 100 to 200 ppm, Number of Pump Strokes 1
Sampling Time: 1.5 minute per pump stroke
Colour Change: White → Brown
Reaction Principle: C6H4(CH3)2 + I2O5 + H2SO4 → I2
Coefficient of Variation: 10% (for 2 to 30 ppm), 5% (for 30 to 100 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Detail

Catalog

Manual

Performance
Measuring Range
2 to100 ppm 100 to 200 ppm
Number of Pump Strokes
2 1
Correction Factor
1 2
Sampling Time 1.5 minutes per pump stroke
Detecting Limit 1 ppm (n=2)
Colour Change White → Brown
Reaction Principle C6H4(CH3)2 + I2O5 + H2SO4 → I2
Coefficient of Variation 10% (for 2 to 30 ppm), 5% (for 30 to 100 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
Acetylene , Ethylene , Hexane   No No
Alcohols , Esters , Ketones   No No
Aromatic hydrocarbons   + Brown
Calibration gas generation Diffusion tube method
TLV-TWA TLV-STEL Explosive range
100 ppm 150 ppm 1.0 to 7.0%
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