Gastec 135L 快速1,1,1-三氯乙烷检测管CH3CCl3(6~900ppm)

Indicator: 20 to 200 ppm
Measuring Range: 
+ 6 to 20 ppm, Number of Pump Strokes 2
+ 20 to 200 ppm, Number of Pump Strokes 1
+ 200 to 900 ppm, Number of Pump Strokes 1/2
Sampling Time: 3 minute per pump stroke
Colour Change: White → Pale Pink
Coefficient of Variation: 10% (for 20 to 60 ppm), 5% (for 60 to 200 ppm)
Nr. of tests: 5
Pump: GV-100S/110S

Detail

Catalog

Manual

Performance
Measuring Range
6 to 20 ppm 20 to 200 ppm 200 to 900 ppm
Number of Pump Strokes
2 1 1/2
Correction Factor
0.3 1 4.5
Sampling Time 3 minutes per pump stroke
Detecting Limit 3 ppm (n=2)
Colour Change White → Pale Pink
Reaction Principle 1,1,1-Trichloroethane reacts with oxidizing agent to produce intermediate products then it reacts with detecting agent to produce pale pink stain.
Coefficient of Variation 10% (for 20 to 60 ppm), 5% (for 60 to 200 ppm)
Shelf Life 2 Years
Corrections for temperature & humidity Temperature correction is necessary
Store the tubes at cool and dark place.
Possible coexisting substances and their interferences (NOTE)
Substance Concentration Interference Change colour by itself to
Halogens   + Pale pink
Nitrogen oxides   + Pale pink
Saturated halogenated hydrocarbons   + Pale pink
Other substance measurable with this detector tube
Substance Correction Factor No. of pump strokes Measuring Range
1,2-Dichloroethane 5.2 1 104 to 1040 ppm
1,1,2,2-Tetrabromoethane 0.046 4 0.92 to 9.2 ppm
1,2,3-Trichloropropane 1.8 4 36 to 360 ppm
Calibration gas generation Diffusion tube method
TLV-TWA TLV-STEL Explosive range
350 ppm 450 ppm -

 

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