Indicator: 20 to 200 ppm
Measuring Range:
+ 20 to 200 ppm, Number of Pump Strokes 2
+ 200 to 460 ppm, Number of Pump Strokes 1
Sampling Time: 2 minute per pump stroke
Colour Change: Pink → Pale blue
Reaction Principle: CH3CH(OH)CH3 + Cr6++ H2SO4 → Cr3+
Coefficient of Variation: 10% (for 20 to 60 ppm), 5% (for 60 to 200 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Details
Catalog
Manual
Performance
Measuring Range |
20 to 200 ppm |
200 to 460 ppm |
|
Number of Pump Strokes |
|
Correction Factor |
|
Sampling Time |
2 minutes per pump stroke |
Detecting Limit |
7 ppm (n=2) |
Colour Change |
Pink → Pale blue |
Reaction Principle |
CH3CH(OH)CH3 + Cr6++ H2SO4 → Cr3+ |
Coefficient of Variation |
10% (for 20 to 60 ppm), 5% (for 60 to 200 ppm) |
Shelf Life |
2 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 |
Alcohols |
|
+ |
Pale blue |
Esters,Ketones |
|
No |
No |
Aliphatic hydrocarbon |
|
No |
No |
Aromatic hydrocarbon |
|
No |
No |
Other substance measurable with this detector tube
Substance |
Correction Factor |
No. of pump strokes |
Measuring Range |
Propyl alcohol |
by scale |
2 |
55 to 170 ppm |
Ethylene glycol MBE |
by scale |
2 |
60 to 400 ppm |
Ethylene glycol MEE |
2.3 |
2 |
46 to 460 ppm |
Ethylene glycol MME |
2.2 |
2 |
44 to 440 ppm |
1-Methoxy-2-propanol |
1.3 |
2 |
26 to 260 ppm |
Calibration gas generation |
Diffusion tube method |
TLV-TWA |
TLV-STEL |
Explosive range |
200 ppm (2014) |
400 ppm (2014) |
2 to 12.7% |