主页 有毒有害气体快速检测管（用泵） Gastec 159L 便携式气体检测管四氢呋喃检测管C4H8O（5~232ppm）

Gastec 159L 便携式气体检测管四氢呋喃检测管C4H8O（5~232ppm）

Indicator: 5 to 80 ppm
Measuring Range: 
+ 5 to 80 ppm, Number of Pump Strokes 1
+ 80 to 232 ppm, Number of Pump Strokes 1/2
Sampling Time: 2 minute per pump stroke
Colour Change: Pale yellow　→　Pale blue
Reaction Principle: C4H8O + Cr6+ + H3PO4 → Cr3+
Coefficient of Variation: 10% (for 5 to 10 ppm), 5% (for 10 to 80 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Detail

Catalog

Manual

Performance
Measuring Range
5 to 80 ppm 80 to 232 ppm
Number of Pump Strokes
1 1/2
Correction Factor
1 2.9
Sampling Time 2 minutes per pump stroke
Detecting Limit 1.4 ppm (n=1)
Colour Change Pale yellow　→　Pale blue
Reaction Principle C4H8O + Cr6+ + H3PO4 → Cr3+
Coefficient of Variation 10% (for 5 to 10 ppm), 5% (for 10 to 80 ppm)
Shelf Life 1 Years
Corrections for temperature & humidity Temperature correction is necessary
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
Acrolein 30ppm + Pink when 30ppm or higher
Acetone 200ppm No Pink when 200ppm or higher
Acetic Acid 200ppm No No discolouration up to 400 ppm
Ethyl Acetate 1ppm + Pink when 2ppm or higher
Diethyl Ether 1ppm + Pale blue
Trichloroethylene 100ppm No Pink when 100ppm or higher
Toluene 1ppm + White when 4ppm or higher
n-Hexane 10ppm Unclear demarcation Pink when 10ppm or higher
Benzen 100ppm No White when 500ppm or higher
Methanol 2ppm +

Pink when 5ppm or higher
Pale blue when 9ppm or higher
Methyl Ethyl Ketone 2ppm + Pink when 3ppm or higher
Calibration gas generation Diffusion tube method
TLV-TWA TLV-STEL Explosive range
50 ppm (2014) 100 ppm (2014) 2 to 11.8%
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