Description
Gastec detector tube No. 4HM measures hydrogen sulfide (H2S) in air from 25 to 1600 ppm. Break both tips off the tube, fit it to a Gastec GV-100 or GV-110 hand pump and draw the number of pump strokes listed for the expected range. The reagent changes from white to brown, and the stain shows the gas concentration. Read the concentration directly on the scale printed on the tube. 10 tubes per box give 10 tests.
Hydrogen sulfide is a toxic gas found around oil and gas wells, sour gas lines, sewers, ballast and bilge tanks and other confined spaces. A tube gives a spot reading and does not replace a certified gas monitor where your site procedure requires one. Use only Gastec tubes with a Gastec pump, break the tips away from your eyes, and never handle broken glass or reagent with bare hands.
Features
- Measures hydrogen sulfide (H2S) from 25 to 1600 ppm
- Colour change white to brown
- Direct-reading scale printed on the tube
- For use with a Gastec GV-100 or GV-110 hand pump
- 10 tubes per box, 36-month shelf life
- Each production lot is tested and calibrated by the manufacturer
Specifications
| Brand | Gastec |
|---|---|
| Manufacturer part number (MPN) | 4HM |
| Big Papa SKU | BP-L-IG4HM |
| Type | Colourimetric detector tube |
| Gas measured | hydrogen sulfide (H2S) |
| Measuring range | 25–1600 ppm |
| Pump strokes and sampling time | 25–50 ppm: 2 strokes (200 mL) in 1.5 min; 50–800 ppm: 1 stroke (100 mL) in 45 s; 800–1600 ppm: ½ stroke (50 mL) in 30 s |
| Colour change | white to brown |
| Detection limit | 5 ppm (2 strokes) |
| Operating temperature | 0 to 40 °C (32 to 104 °F) |
| Relative humidity | 0 to 90 % |
| Temperature correction | Not required |
| Tubes per box | 10 |
| Shelf life | 36 months |
| Model No. | 4HM |
| Disposal note | contains 1.30 mg of lead per the SDS; dispose of per local regulations |
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