Description
Gastec detector tube No. 31B measures oxygen (O2) in air from 3 to 24 %. 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 black to white, and the stain shows the gas concentration. Read the concentration directly on the scale printed on the tube. 5 tubes per box give 5 tests.
Oxygen level checks help find oxygen-deficient air in tanks, holds, vessels and other confined spaces before anyone enters. 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 oxygen (O2) from 3 to 24 %
- Colour change black to white
- Direct-reading scale printed on the tube
- For use with a Gastec GV-100 or GV-110 hand pump
- 5 tubes per box, 36-month shelf life
- Each production lot is tested and calibrated by the manufacturer
Specifications
| Brand | Gastec |
|---|---|
| Manufacturer part number (MPN) | 31B |
| Big Papa SKU | BP-L-IG31B |
| Type | Colourimetric detector tube |
| Gas measured | oxygen (O2) |
| Measuring range | 3–24 % |
| Pump strokes and sampling time | 3–6 %: 1 stroke (100 mL) in 1 min; 6–24 %: ½ stroke (50 mL) in 30 s |
| Colour change | black to white |
| Detection limit | 2 % (1 stroke) |
| Operating temperature | 0 to 40 °C (32 to 104 °F) |
| Relative humidity | 0 to 90 % |
| Temperature correction | Not required |
| Tubes per box | 5 |
| Shelf life | 36 months |
| Model No. | 31B |
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