Indicator: 0.03 to 0.6%
Measuring Range:
+ 0.015 to 0.03%, Number of Pump Strokes 2
+ 0.03 to 0.6%, Number of Pump Strokes 1
+ 0.6 to 1.2%, Number of Pump Strokes 1/2
Sampling Time: 1 minute per pump stroke
Colour Change: Orange → Dark green
Reaction Principle: CnHm + Cr^(6+)+ H2SO4 → Cr^(3+)
Coefficient of Variation: 10% (for 0.03 to 0.1 %), 5% (for 0.1 to 0.6 %)
Nr. of tests: 10
Pump: GV-100S/110S
Details
Catalog
Manual
Performance
Measuring Range |
0.015 to 0.03% |
0.03 to 0.6% |
0.6 to 1.2% |
|
Number of Pump Strokes |
|
Correction Factor |
|
Sampling Time |
1 minute per pump stroke |
Detecting Limit |
0.003% (n = 2) |
Colour Change |
Orange → Dark green |
Reaction Principle |
CnHm + Cr6++ H2SO4 → Cr3+ |
Coefficient of Variation |
10% (for 0.03 to 0.1 %), 5% (for 0.1 to 0.6 %) |
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 |
Acetylene |
3% |
+ |
Dark brown (whole layer) |
Propane |
0.2% |
+ |
Dark brown (whole layer) |
Aromatic HCs |
500 ppm |
+ |
Dark green |
Alcohols, Esters, Ethers |
|
+ |
Dark green |
Halogenated HCs. |
5000 ppm |
+ |
Dark green |
Hydrogen sulphide |
500 ppm |
+ |
Dark green |
sulphur dioxide |
500 ppm |
+ |
Green |
Other substance measurable with this detector tube
Substance |
Correction Factor |
No. of pump strokes |
Measuring Range |
Heptane |
Factor: 1.0 |
1/2, 1 or 2 |
0.015 to 1.2% |
Isooctane |
Factor: 0.9 |
1 |
0.027 to 0.54% |
Octane |
Factor: 1.2 |
1 |
0.036 to 0.72% |
Calibration gas generation |
Static gas dilution method |
TLV-TWA |
TLV-STEL |
Explosive range |
300 ppm |
500 ppm |
1.4 to 7.6% |