Gastec 124 便携式气体检测管苯乙烯检测管 C6H5CH:CH2(10-1500 ppm)

Indicator: 20 to 500 ppm
Measuring Range: 
+ 10 to 20 ppm, Number of Pump Strokes 2
+ 20 to 500 ppm, Number of Pump Strokes 1
+ 500 to 1500 ppm, Number of Pump Strokes 1/2
Sampling Time: 30 seconds per pump stroke
Colour Change: White → Yellow
Reaction Principle: C6H5CH:CH2+ H2S2O7 → Condensation Polymer
Coefficient of Variation: 15% (for 20 to 100 ppm), 10% (for 100 to 500 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Detail

Catalog

Manual

Manual tube

Performance
Measuring Range
10 to 20 ppm 20 to 500 ppm 500 to 1500 ppm
Number of Pump Strokes
2 1 1/2
Correction Factor
1/2 1 3
Sampling Time 30 seconds per pump stroke
Detecting Limit 1 ppm (n=2)
Colour Change White → Yellow
Reaction Principle C6H5CH:CH2+ H2S2O7 → Condensation Polymer
Coefficient of Variation 15% (for 20 to 100 ppm), 10% (for 100 to 500 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 ≧ 0.5% + (Bleaching) No
Esters ≧ 0.5% + (Bleaching) No
Ketones ≧ 0.5% + (Bleaching) No
Calibration gas generation Diffusion tube method
TLV-TWA TLV-STEL Explosive range
20 ppm 40 ppm 1.1 to 6.1%
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