Hydrogen Sulfide (H2S) Detection Tubes (0.25 to 20%)
Gastec Detection Tube No. 4HP measures Hydrogen Sulfide with a Range of 0.25-20%.
- Measuring Range:
- 0.25 to 0.5%
- (0.5) to 10%
- 10 to 20%
- Number of Pump Strokes: 2, 1, 1/2
- Correction Factor: 1/2, 1, 2
- Sampling Time: 3 minutes per pump stroke
- Detecting Limit: 0.1% (2 pump strokes)
- Reaction Principle: H2S + CuSO4 → CuS + H2SO4
- Relative Standard Deviation: 10% (for 0.5 to 3 %), 5% (for 3 to 10 %)
- Color Change: Pale Blue to Blackish Brown
- Corrections for temperature & humidity: Unnecessary
- 3 Year Shelf Life
- Store the tubes at cool and dark place.
- Comes in a Box of 10
Possible coexisting substances and their interferences:
| Substance |
Concentration |
Interference |
Changes color by itself to |
| Ammonia |
|
Two layers (Blackish brown & dark blue) |
Dark blue |
| Mercaptans |
≧ 5% |
+ |
No |
| Sulfur dioxide |
≧ 2.5% |
- |
No |
Hydrogen Sulfide (H2S) Detection Tubes (0.25 to 20%)
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