Gastec 183 便携式气体检测管N,N-二甲替甲酰胺检测管(HCON(CH3)2)(0.8~90ppm)

Indicator: 2 to 30 ppm
Measuring Range: 
+ 0.8 to 2 ppm, Number of Pump Strokes 2
+ 2 to 30 ppm, Number of Pump Strokes 1
+ 30 to 90 ppm, Number of Pump Strokes 1/2
Sampling Time: 1 minute per pump stroke
Colour Change: Pink → Pale red
Reaction Principle: HCON(CH3)2 + NaOH → R-NH2, 2R-NH2 + H2SO4 → (R-NH2)2SO4
Coefficient of Variation: 15% (for 2 to 10 ppm), 10% (for 10 to 30 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Detail

Catalog

Manual

Performance
Measuring Range
0.8 to 2 ppm 2 to 30 ppm 30 to 90 ppm
Number of Pump Strokes
2 1 1/2
Correction Factor
0.4 1 3
Sampling Time 1 minute per pump stroke
Detecting Limit 0.1 ppm (n=2)
Colour Change Pink → Pale red
Reaction Principle HCON(CH3)2 + NaOH → R-NH2
2R-NH2 + H2SO4 → (R-NH2)2SO4
Coefficient of Variation 15% (for 2 to 10 ppm), 10% (for 10 to 30 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 red
Ammomia   + Pale red
Hydrazine   + Pale red
Calibration gas generation Diffusion tube method
TLV-TWA TLV-STEL Explosive range
10 ppm - 2.2 to 15.2%
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