Gastec 3M 氨气体检测管 NH3(10-1000ppm)

Indicator: 50 to 500 ppm
Measuring Range: 
+ 10 to 50 ppm, Number of Pump Strokes 2 to 5
+ 50 to 500 ppm, Number of Pump Strokes 1
+ 500 to 1000 ppm, Number of Pump Strokes 1/2
Sampling Time:  45 second per pump stroke
Colour Change: Purple → Yellow
Reaction Principle: 3NH3 + H3PO4 → (NH4)3PO4
Coefficient of Variation: 5% (for 50 to 500 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Detail

Catalog

Manual

Manual tube

Performance
Measuring Range
10 to 50 ppm 50 to 500 ppm 500 to 1000 ppm
Number of Pump Strokes
2 to 5 1 1/2
Correction Factor
1/2 to 1/5 1 2
Sampling Time 45 seconds per pump stroke
Detecting Limit 2 ppm (n=5)
Colour Change Purple → Yellow
Reaction Principle 3NH3 + H3PO4 → (NH4)3PO4
Coefficient of Variation 5% (for 50 to 500 ppm)
Shelf Life 3 Years
Corrections for temperature & humidity Unnecessary
Store the tubes in dark and cool place.
Possible coexisting substances and their interferences (NOTE)
Substance Concentration Interference Change colour by itself to
Diamines 1/8 + Yellow
Monoamines 1/15 + Yellow
Carbon dioxide 1% No
Other substance measurable with this detector tube
Substance Correction Factor No. of pump strokes Measuring Range
Trimethylamine 0.5 1 25 to 250 ppm
Calibration gas generation Permeation tube method
TLV-TWA TLV-STEL Explosive range
25 ppm (2014) 35 ppm (2014) 15 to 28%
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