Gastec 112L快速乙醇测量探测管 C2H5OH(50-2000ppm)

Indicator: 100 to 2000 ppm
Measuring Range: 
+ 50 to 100 ppm, Number of Pump Strokes 2
+ 100 to 2000 ppm, Number of Pump Strokes 1
Sampling Time: 2 minutes per pump stroke
Colour Change: Pink → Pale blue
Reaction Principle: C2H5OH + Cr6+ + H2SO4 → Cr3+
Coefficient of Variation: 10% (for 100 to 500 ppm), 5% (for 500 to 2000 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Detail

Catalog

Manual

Manual tube

Performance
Measuring Range
50 to 100 ppm 100 to 2000 ppm
Number of Pump Strokes
2 1
Correction Factor
1/2 1
Sampling Time 2 minutes per pump stroke
Detecting Limit 15 ppm (n=2)
Colour Change Pink → Pale blue
Reaction Principle C2H5OH + Cr6+ + H2SO4 → Cr3+
Coefficient of Variation 10% (for 100 to 500 ppm), 5% (for 500 to 2000 ppm)
Shelf Life 3 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
Alcohols   + Pale blue
Acetone 1000 ppm No No discolouration up to 1000 ppm
Ethyl Acetate 500ppm No No discolouration up to 500 ppm
Toluene 300ppm No No discolouration up to 300 ppm
Benzene 70ppm No No discolouration
Calibration gas generation Diffusion tube method
TLV-TWA TLV-STEL Explosive range
- 1000ppm (2014) 3.3 to 19%
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