Indicator: 0.5 to 10 ppm
Measuring Range:
+ 0.045 to 0.1 ppm, Number of Pump Strokes 2
+ 0.1 to 10 ppm, Number of Pump Strokes 1
+ 10 to 22 ppm, Number of Pump Strokes 1/2
Sampling Time: 2 minute per pump stroke
Colour Change: White → Yellow
Reaction Principle:
+ CCl3NO2 + I2O5 + H2S2O7 → COCl2
+ COCl2 + (CH3)2NC6H4CHO → (CH3)2NC6H4CHCl2 + CO2
+ (CH3)2NC6H4CHCl2 + (C6H5)2NH→ Reaction product
Coefficient of Variation: 10% (for 0.1 to 3.0 ppm), 5% (for 3.0 to 10.0 ppm)
Nr. of tests: 5
Pump: GV-100S/110S
Details
Catalog
Manual
Performance
Measuring Range |
0.045 to 0.1 ppm |
0.1 to 10 ppm |
10 to 22 ppm |
Number of Pump Strokes |
2 |
1 |
1/2 |
Correction Factor |
0.45 |
1 |
2.2 |
Sampling Time |
2 minutes per pump stroke |
Detecting Limit |
0.03 ppm (n=2) |
Colour Change |
White → Yellow |
Reaction Principle |
CCl3NO2 + I2O5 + H2S2O7 → COCl2 COCl2 + (CH3)2NC6H4CHO → (CH3)2NC6H4CHCl2 + CO2 (CH3)2NC6H4CHCl2 + (C6H5)2NH→ Reaction product
|
Coefficient of Variation |
10% (for 0.1 to 3.0 ppm), 5% (for 3.0 to 10.0 ppm) |
Shelf Life |
1 Year |
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 |
|
No |
No discolouration |
Carbon Dioxide |
|
No |
No discolouration |
Carbon Monoxide |
10ppm |
 |
No discolouration |
Ethylene Oxide |
|
No |
No discolouration |
Formaldehyde |
|
No |
No discolouration |
Hydrogen Cyanide |
|
No |
No discolouration |
Bromomethane |
2ppm |
+ |
Yellow ( 2 ppm) |
Phosphine |
|
No |
No discolouration |
Sulphuryl Fluoride |
|
No |
No discolouration |
1,2-Dichloroethane |
|
No |
No discolouration |
Benzene |
|
No |
No discolouration |
Toluene |
|
No |
No discolouration |
Calibration gas generation |
Diffusion tube method |
TLV-TWA |
TLV-STEL |
Explosive range |
0.1 ppm(2013) |
- |
- |