Gastec 131 快速偏二氯乙烯测量检测管CH2:CCl2(0.025~2%)

Indicator: 0.05 to 1 %
Measuring Range: 
+ 0.025 to 0.05 %, Number of Pump Strokes 2
+ 0.05 to 1 %, Number of Pump Strokes 1
+ 1 to 2 %, Number of Pump Strokes 1/2
Sampling Time: 1 minute per pump stroke
Colour Change: Orange → Dark green
Reaction Principle: CH2:CHCl + Cr6+ + H2SO4 → Cr3+
Coefficient of Variation: 10% (for 0.05 to 0.2 %), 5% (for 0.2 to 1 %) 
Nr. of tests: 10
Pump: GV-100S/110S

Detail

Catalog

Manual

Performance
Measuring Range
0.025 to 0.05 % 0.05 to 1 % 1 to 2 %
Number of Pump Strokes
2 1 1/2
Correction Factor
1/2 1 2
Sampling Time
1 minute per pump stroke 45 seconds
Detecting Limit 0.005 % (n=2)
Colour Change Orange → Dark green
Reaction Principle CH2:CHCl + Cr6+ + H2SO4 → Cr3+
Coefficient of Variation 10% (for 0.05 to 0.2 %), 5% (for 0.2 to 1 %)
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
Organic solvents   + Dark green
Calibration gas generation Static gas dilution method
TLV-TWA TLV-STEL Explosive range
1 ppm (2014) - 3.6 to 23 %

 

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