Hydrogen Sulfide (H2S) Detection Tubes (0.1 to 4.0%)
Gastec Detection Tube No. 4HH measures Hydrogen Sulfide with a Range of 0.1 to 4%.
- Measuring Range: 0.1 to 2%, 2 to 4%
- Number of pump strokes: 1, 1/2
- Correction Factor: 1, 2
- Sampling Time: 45 seconds per pump stroke
- Detecting Limit: 0.01% (1 pump stroke)
- Changes from Pale Blue to Blackish Brown
- Reaction Principle: H2S + CuSO4 → CuS + H2SO4
- Relative Standard Deviation: 10% (for 0.1 to 0.6 %), 5% (for 0.6 to 2 %)
- 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 |
| Ammonia |
|
Two layers (Blackish brown & dark blue) |
Dark blue |
| Mercaptans |
≧ 1% |
+ |
No |
| Sulfur dioxide |
≧ 0.5% |
- |
No |
Hydrogen Sulfide (H2S) Detection Tubes (0.1 to 4.0%)
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