Gastec 40 Quick-measuring Detector tubes Mercury vapour Hg (0.05 ~ 13.2 mg/m3)
ManufacturerGastec(View more products from this manufacturer)
Model40
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Indicator: 0.25 to 6.0 mg/m3
Measuring Range:
+ 0.05 to 0.25 mg/m3, Number of Pump Strokes 5
+ 0.25 to 6.0 mg/m3, Number of Pump Strokes 1
+ 6.0 to 13.2 mg/m3, Number of Pump Strokes 1/2
Sampling Time: 1.5 minute per pump stroke
Colour Change: White → Pale Orange
Reaction Principle: Hg + Cu2I2 → Cu2(HgI4) + 2Cu
Coefficient of Variation: 10% (for 0.25 to 2 mg/m3), 5% (for 2 to 6 mg/m3)
Nr. of tests: 10
Pump: GV-100S/110S
Performance
| Measuring Range |
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| Number of Pump Strokes |
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| Correction Factor |
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| Sampling Time | 1.5 minutes per pump stroke | |||
| Detecting Limit | 0.01 mg/m3 (n=5) | |||
| Colour Change | White → Pale Orange | |||
| Reaction Principle | Hg + Cu2I2 → Cu2(HgI4) + 2Cu | |||
| Coefficient of Variation | 10% (for 0.25 to 2 mg/m3), 5% (for 2 to 6 mg/m3) | |||
| 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 |
| Chlorine | + | Pale orange | |
| Nitrogen dioxide | + | Pale orange | |
| Hydrogen sulphide | + | Pale orange (whole layer) |
| Calibration gas generation | Vaper pressure method |
| TLV-TWA | TLV-STEL | Explosive range |
| 0.025mg/m3 | - | - |
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