Gastec 92 快速乙醛检测管CH3CHO(5~750ppm)

Indicator: 10 to 300 ppm
Measuring Range: 
+ 5 to10 ppm, Number of Pump Strokes 4
+ 10 to 300 ppm, Number of Pump Strokes 2
+ 300 to 750 ppm, Number of Pump Strokes 1
Sampling Time: 1.5 minute per pump stroke
Colour Change: Yellow → Red
Reaction Principle: 3CH3CHO + (NH2OH)3H3PO4 → H3PO4, H3PO4 + Base → Phosphate
Coefficient of Variation: 10% (for 10 to 100 ppm), 5% (for 100 to 300 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Detail

Catalog

Manual

Performance
Measuring Range
5 to10 ppm 10 to 300 ppm 300 to 750 ppm
Number of Pump Strokes
4 2 1
Correction Factor
0.5 1 2.5
Sampling Time 1.5 minutes per pump stroke
Detecting Limit 2 ppm (n=4)
Colour Change Yellow → Red
Reaction Principle 3CH3CHO + (NH2OH)3H3PO4 → H3PO4
H3PO4 + Base → Phosphate
Coefficient of Variation 10% (for 10 to 100 ppm), 5% (for 100 to 300 ppm)
Shelf Life 2 Years
Corrections for temperature & humidity Unnecessary
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
Ammonia   No
Acrolein 3/5 times + Red
Acetone 2 times + Red
Methyl ethyl ketone 6 times + Red
MIBK 10 times + Red
Other substance measurable with this detector tube
Substance Correction Factor No. of pump strokes Measuring Range
Diacetyl by scale 3 25 to 1500 ppm
Calibration gas generation Diffusion tube method
TLV-TWA TLV-STEL Explosive range
- C 25 ppm 4 to 60%

 

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