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Indicator: 0.05 ~ 0.6%
Measuring Range: 0.05 ~ 0.6%, Number of Pump Strokes 2
Sampling Time: 45 seconds per pump stroke
Colour Change: Orange →Greenish brown
Reaction Principle: (CH3)2CHCH2COCH3+ Cr6+ + H2SO4 → Cr3+
Coefficient of Variation: 10% (for 0.05 to 0.6 %)
Nr. of tests: 10
Pump: GV-100S/110S
| Measuring Range | 0.05 to 0.6% |
| Number of Pump Strokes | 2 |
| Correction Factor | 1 |
| Sampling Time | 45 seconds per pump stroke |
| Detecting Limit | 0.005% (n=2) |
| Colour Change | Orange →Greenish brown |
| Reaction Principle | (CH3)2CHCH2COCH3+ Cr6+ + H2SO4 → Cr3+ |
| Coefficient of Variation | 10% (for 0.05 to 0.6 %) |
| Shelf Life | 3 Years |
| Corrections for temperature & humidity | Temperature correction is necessary |
| Store the tubes at cool and dark place. | |
| Substance | Concentration | Interference | Change colour by itself to |
| Sulphur dioxide |  100 ppm |
Two layers (Greenish brown & Pale brown) |
Brown(50 ppm) |
| Hydrogen sulphide | 100 ppm |
Two layers (Greenish brown & Pale brown) |
Greenish brown(25 ppm) |
| Alcohols, Esters,Ketones | + | Greenish brown | |
| Propane | 0.2% |
Cannot use | Pale brown for whole layer(0.2%) |
| Toluene | 25ppm |
Two layers (Greenish brown & Pale brown) |
Pale brown(15 ppm) |
| Substance | Correction Factor | No. of pump strokes | Measuring Range |
| Styrene | by scale | 2 | 0.15 to 2.3% |
| Calibration gas generation | Static gas dilution method |
| TLV-TWA | TLV-STEL | Explosive range |
| 20 ppm (2015) | 75 ppm (2015) | 1.2 to 8% |
