Gastec 112D 乙醇被动发现管C2H5OH(100~25000 ppm)

Indicator: 1000 ~ 25000 ppm
Measuring Range: 100 ~ 25000 ppm
Sampling Hours:  1 to 10 hours
Colour Change: Yellow → Brown
Reaction Principle: C2H5OH + Cr6++ H2SO4 → Cr3+
Coefficient of Variation: 15% (for 1000 to 3000 ppm-hr), 10% (for 3000 to 25000 ppm-hr)
Nr. of tests: 10

Detail

Catalog

 

Performance
Measuring Range 100 to 25000 ppm
Sampling Hours 1 to 10 hours
Detecting Limit 0.05 ppm (10 hours)
Colour Change Yellow → Brown
Reaction Principle C2H5OH + Cr6++ H2SO4 → Cr3+
Coefficient of Variation 15% (for 1000 to 3000 ppm-hr), 10% (for 3000 to 25000 ppm-hr)
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
Esters   No No
Other alcohols except IPA   No No
Isopropyl alcohol ≧ 1/1 + Brown
Calibration gas generation Diffusion tube method
TLV-TWA TLV-STEL Explosive range
- 1000ppm (2014) 3.3 to 19%

 

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