Indicator: 0.5-5mg/m3
Measuring Range: 0.5-5mg/m3, Number of Pump Strokes 5
Sampling Time: 1 minute per pump stroke
Colour Change: Pale yellow → Reddish purple
Reaction Principle: H2SO4 + BaCl2 → 2HCl, HCl+Base → Chloride
Coefficient of Variation: 10% (for 0.5 to 2 mg/m3), 5% (for 2 to 5 mg/m3)
Nr. of tests: 10
Pump: GV-100S/110S
Performance
| Measuring Range | 0.5 to 5 mg/m3 |
| Number of Pump Strokes | 5 |
| Correction Factor | 1 |
| Sampling Time | 1 minute per pump stroke |
| Detecting Limit | 0.2 mg/m3(n=5) |
| Colour Change | Pale yellow → Reddish purple |
| Reaction Principle | H2SO4 + BaCl2 → 2HCl HCl+Base → Chloride |
| Coefficient of Variation | 10% (for 0.5 to 2 mg/m3), 5% (for 2 to 5 mg/m3) |
| 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 |
| Hydrogen chloride |  0.05 ppm |
+ | Reddish purple |
| Chlorine | 1.5 ppm |
+ | Reddish purple |
| sulphur dioxide | No | No | |
| Nitrogen dioxide | 4 ppm |
+ | Reddish purple |
| Hydrogen fluoride | 0.5 ppm |
+ | Reddish purple |
| Calibration gas generation | Vaper pressure method |
| TLV-TWA | TLV-STEL | Explosive range |
| 0.2mg/m3(2014) | - | - |
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