Gastec 181 快速苯胺测量探测管C6H5NH2(1.25~60ppm)

Indicator: 2.5 to 30 ppm
Measuring Range: 
+ 1.25 to 2.5 ppm, Number of Pump Strokes 5
+ 2.5 to 30 ppm, Number of Pump Strokes 3
Sampling Time: 1 minute per pump stroke
Colour Change: Pale yellow → Pale green
Reaction Principle: C6H5NH2 + Cr6+ → Cr3+
Coefficient of Variation: 10% (for 2.5 to 10 ppm), 5% (for 10 to 30 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Detail

Catalog

Manual

Performance
Measuring Range
1.25 to 2.5 ppm 2.5 to 30 ppm 30 to 60 ppm
Number of Pump Strokes
5 3 2
Correction Factor
1/2 1 2
Sampling Time 1 minute per pump stroke
Detecting Limit 0.25 ppm (n=5)
Colour Change Pale yellow → Pale green
Reaction Principle C6H5NH2 + Cr6+ → Cr3+
Coefficient of Variation 10% (for 2.5 to 10 ppm), 5% (for 10 to 30 ppm)
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
Ammonia 1/10 time + No
Amines 1/10 time + No
Aromatic amines   + Pale green
Other substance measurable with this detector tube
Substance Correction Factor No. of pump strokes Measuring Range
N-methylaniline Factor:1.4 2 3.5 to 42 ppm
N,N-Dimethylaniline Factor:1.0 3 2.5 to 30 ppm
o-Toluidine Factor: 2.0 2 5 to 60 ppm
Calibration gas generation Diffusion tube method
TLV-TWA TLV-STEL Explosive range
2 ppm - 1.3 to 11%
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