Gastec 134L 四氯化碳检测管CCl4(0.25~11ppm)

Indicator: 0.25 to 5 ppm
Measuring Range: 
+ 0.25 to 5 ppm, Number of Pump Strokes 2
+ 5 to 11 ppm, Number of Pump Strokes 1
Sampling Time: 2 minutes per pump stroke
Colour Change: White → Yellow
Reaction Principle: 
+ CCl4 + I2O5 + H2S2O7 → COCl2, 
+ COCl2 + (CH3)2NC6 H4CHO→ (CH3)2NC6 H4CHCl2 + CO2,
+ (CH3)2NC6H4CHCl2 + (C6H5)2NH(White) → Reaction product (Yellow)
Coefficient of Variation: 10% (for 0.25 to 1 ppm), 5% (for 1 to 5 ppm)
Nr. of tests: 5
Pump: GV-100S/110S

Detail

Catalog

Manual

Performance
Measuring Range
0.25 to 5 ppm 5 to 11 ppm
Number of Pump Strokes
2 1
Correction Factor
1 2.2
Sampling Time 2 minutes per pump stroke
Detecting Limit 0.04 ppm (n=2)
Colour Change White → Yellow
Reaction Principle

CCl4 + I2O5 + H2S2O7 → COCl2
COCl2 + (CH3)2NC6 H4CHO→ (CH3)2NC6 H4CHCl2 + CO2
(CH3)2NC6H4CHCl2 + (C6H5)2NH(White) → Reaction product (Yellow)

Coefficient of Variation 10% (for 0.25 to 1 ppm), 5% (for 1 to 5 ppm)
Shelf Life 1 Year
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   No No
Chlorine, Bromine 3/10 + No(0.4ppm)
Methyl bromide 2.5times + Pale yellow (2.5ppm)
1,1,1-Trichloroethane 14 ppm + No(17ppm)
Other substance measurable with this detector tube
Substance Correction Factor No. of pump strokes Measuring Range
Chloropicrin 1.1 2 0.28 to 5.5 ppm
Calibration gas generation Diffusion tube method
TLV-TWA TLV-STEL Explosive range
5 ppm(2015) 10 ppm(2015) -
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