Gastec 121L 快速检知管 C6H6(0.1~65 ppm)

Indicator: 0.1 to 10 ppm
Measuring Range: 
+ 0.1 to 10 ppm, Number of Pump Strokes 5
+ 10 to 65 ppm, Number of Pump Strokes 1
Sampling Time: 2 minute per pump stroke
Colour Change: White → Dark green
Reaction Principle: C6H5 + I2O5→ H2S2O7 + I2
Coefficient of Variation: 10% (for 0.1 to 3 ppm), 5% (for 3 to 10 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Detail

Catalog

Manual

Performance
Measuring Range
0.1 to 10 ppm 10 to 65 ppm
Number of Pump Strokes
5 1
Correction Factor
1 6.5
Sampling Time 2 minutes per pump stroke
Detecting Limit 0.05 ppm (n=5)
Colour Change White → Dark green
Reaction Principle C6H5 + I2O5→ H2S2O7 + I2
Coefficient of Variation 10% (for 0.1 to 3 ppm), 5% (for 3 to 10 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
Alcohols, Ketones   No No
Ethyl benzene 1/1 + Dark brown
Xylene 10 ppm + Dark brown around zero point
Toluene 1/1 + Dark brown
Hexane 3 ppm +(Unclear demarcation) No
Other substance measurable with this detector tube
Substance Correction Factor No. of pump strokes Measuring Range
Methylene Iodide 2.2 5 0.22 to 22 ppm
Methyl Iodide 3.2 5 0.32 to 32 ppm
Calibration gas generation Permeation tube method
TLV-TWA TLV-STEL Explosive range
0.5 ppm(2014) 2.5 ppm(2014) 1.3 to 7.1%
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