Gastec 134 便携式气体检测管四氯化碳检测管CCl4(0.5~60ppm)

Indicator: 5 to 60 ppm
Measuring Range: 
+ 0.5 to 2.5 ppm, Number of Pump Strokes 2 to 5
+ 2.5 to 60 ppm, Number of Pump Strokes 1
Sampling Time: 1 minute per pump stroke
Colour Change: White → Yellow
Reaction Principle: 
+ CCl4 + I2O5 + H2S2O7 → COCl2, 
+ COCl2 + (CH3)2NC6 H4CHO→ (CH3)2NC6 H4Cl2, 
+ (CH3)2NC6 H4Cl2 + (C6H5)2NH → Yellow product
Coefficient of Variation: 15% (for 2.5 to 20 ppm), 10% (for 20 to 60 ppm)
Nr. of tests: 5
Pump: GV-100S/110S

Detail

Catalog

Manual

Performance
Measuring Range
0.5 to 2.5 ppm 2.5 to 60 ppm
Number of Pump Strokes
2 to 5 1
Correction Factor
1/2 to 1/5 1
Sampling Time 1 minute per pump stroke
Detecting Limit 0.2 ppm (n=5)
Colour Change White → Yellow
Reaction Principle

CCl4 + I2O5 + H2S2O7 → COCl2
COCl2 + (CH3)2NC6 H4CHO→ (CH3)2NC6 H4Cl2
(CH3)2NC6 H4Cl2 + (C6H5)2NH → Yellow product

Coefficient of Variation 15% (for 2.5 to 20 ppm), 10% (for 20 to 60 ppm)
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 (NOTE)
Substance Concentration Interference Change colour by itself to
Hydrogen chloride 100 ppm + Yellow
Chlorine, Bromine 50 ppm + Yellow
Vinyl chloride, Methylene chloride   No No
Chloroform   No No
Methyl bromide 100 ppm + Yellow
Tetrachloroethylene   No No
1,1,1-Trichloroethane 100 ppm + Yellow
Trichloroethylene   No No
Other substance measurable with this detector tube
Substance Correction Factor No. of pump strokes Measuring Range
Chloropicrin 1.0 1 25 to 60 ppm
Calibration gas generation Diffusion tube method
TLV-TWA TLV-STEL Explosive range
5 ppm (2014) 10 ppm (2014) -
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