Hydrogen Cyanide (HCN) Detection Tubes (17 to 2400 ppm)
Gastec Detection Tube No. 12M measures Hydrogen Cyanide with a Range of 17 to 2400 ppm.
- Measuring Range:
- 17 to 50 ppm
- 50 to 800 ppm
- j800 to 2400 ppm
- Number of Pump Strokes: 2, 1, 1/2
- Correction Factor: 1/3, 1, 3
- Sampling Time: 1 minute per pump stroke
- Detecting Limit: 1 ppm (2 pump strokes)
- Changes from Yellow to Red
- Corrections for temperature & humidity: Unnecessary
- Reaction Principle:
- 2HCN + HgCl2 → Hg(CN)2 + 2HCl
- HCl + Base → Chloride
- Relative Standard Deviation: 10% (for 50 to 200 ppm), 5% (for 200 to 800 ppm)
- 3 Year Shelf Life
- Store the tubes at cool and dark place.
Possible coexisting substances and their interferences:
| Substance |
Concentration |
Interference |
Changes color by itself to |
| Hydrogen sulfide |
≧ 500 ppm |
+ |
Red |
| Sulfur dioxide |
≧ 500 ppm |
+ |
Red |
Hydrogen Cyanide (HCN) Detection Tubes (17 to 2400 ppm)
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