Gastec 184 便携式气体检测管N,N-二甲基乙酰胺检测管 (CH3CON(CH3)2)(1.5~240ppm)

Indicator: 5 to 60 ppm
Measuring Range: 
+ 1.5 to 5 ppm, Number of Pump Strokes 4
+ 5 to 60 ppm, Number of Pump Strokes 2
+ 60 to 240 ppm, Number of Pump Strokes 1
Sampling Time: 1.5 minute per pump stroke
Colour Change: Pink → Pale yellow
Reaction Principle: 
+ CH3CON(CH3)2 + NaOH → R-NH2
+ 2R-NH2 + H2SO4 → (R-NH2)2SO4
Coefficient of Variation: 15% (for 5 to 20 ppm), 10% (for 20 to 60 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Detail

Catalog

Manual

Performance
Measuring Range
1.5 to 5 ppm 5 to 60 ppm 60 to 240 ppm
Number of Pump Strokes
4 2 1
Correction Factor
0.3 1 4
Sampling Time 1.5 minutes per pump stroke
Detecting Limit 0.5 ppm (n=4)
Colour Change Pink → Pale yellow
Reaction Principle CH3CON(CH3)2 + NaOH → R-NH2
2R-NH2 + H2SO4 → (R-NH2)2SO4
Coefficient of Variation 15% (for 5 to 20 ppm), 10% (for 20 to 60 ppm)
Shelf Life 3 Years
Corrections for temperature & humidity Temperature correction is necessary
Store the tubes at cool and dark place.
Possible coexisting substances and their interferences (NOTE)
Substance Concentration Interference Change colour by itself to
Amines   + Pale yellow
Ammomia   + Pale yellow
Hydrazine   + Pale yellow
Calibration gas generation Diffusion tube method
TLV-TWA TLV-STEL Explosive range
10 ppm(2014) - -
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