Gastec 91D 甲醛被动发现管HCHO（0.1~20 ppm）

制造商: Gastec
Model: 91D
来源: Japan
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技术规格
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Indicator: 1 ~ 20 ppm
Measuring Range: 0.1 ~ 20 ppm
Sampling Hours: 1 to 10 hours
Colour Change: Yellow → Reddish Brown
Reaction Principle: 3HCHO + (NH2OH)3 H3PO4 → H3PO4, H3PO4 + Base+Phosphate
Coefficient of Variation: 10% (1 ~ 20 ppm-hr)
Nr. of tests: 10

Details

Performance

Measuring Range	0.1 to 20 ppm
Sampling Hours	1 to 10 hours
Detecting Limit	0.05 ppm (10 hours)
Colour Change	Yellow → Reddish Brown
Reaction Principle	3HCHO + (NH2OH)3 H3PO4 → H3PO4 H3PO4 + Base+Phosphate
Coefficient of Variation	10% (for 1 to 20 ppm-hr)
Shelf Life	1 Year
Corrections for temperature & humidity	Unnecessary
Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below.