Description
The Draeger 8101781 is the Water vapor 1/b detector tube, measuring range 20 to 40 mg/L / 1 to 18 mg/L, 1 /2 pump strokes, measuring time approx. 20 s / approx. 40 s (handbook, p. 278). Sold by the box of 10, 10 single-use tubes. Read on a Draeger accuro or X-act 5000 tube pump. Ships in 1–2 business days; most orders arrive in 3–7 business days. All Draeger tubes for Water vapor.
Draeger 8101781 specifications
| Item | Draeger data |
|---|---|
| Part number | 8101781 |
| Gas or substance | Water vapor |
| Tube type | 1/b |
| Measuring range | 20 to 40 mg/L / 1 to 18 mg/L |
| Number of strokes (n) | 1 /2 |
| Measuring time | approx. 20 s / approx. 40 s |
| Standard deviation | ± 15 to 20 % |
| Color change | yellow → turquoise blue |
| Temperature | 0 to 50 °C |
| Humidity | up to 100 % relative humidity |
| Reaction principle | H2O + Mg(ClO4)2 → turquoise blue reaction product |
| Pack | Box of 10 |
| Pump | Read on a Draeger accuro or X-act 5000 tube pump |
Source: Dräger-Tubes & MicroTubes Handbook, 22nd edition (order no. 90 92 086), p. 278, Dräger Safety AG & Co. KGaA.
Cross-sensitivity (handbook, p. 278): Alkaline gases can cause plus errors. Acid gases can cause minus errors.
Other Draeger tubes for Water vapor
| Part number | Tube | Measuring range | Pack |
|---|---|---|---|
| CH23401 | Draeger Water Vapor 0.1 Detector Tubes, Box of 10 | 1 to 40 mg/L | Box of 10 |
| 8101321 | Draeger Water Vapor 0.1/a Detector Tubes, Box of 10 | 0.1 to 1.0 mg/L | Box of 10 |
| 8103061 | Draeger Water Vapor 20/a-P Tubes for Aerotest, Box of 10 | 20 to 250 mg H2O/m3 | Box of 10 |
| 8103031 | Draeger Water Vapor 3/a Detector Tubes, Box of 10 | 3.0 to 60 Ibs/mmcf | Box of 10 |
| 6728531 | Draeger Water Vapor 5/a-P Tubes for Aerotest, Box of 10 | 5 to 200 mg/m3 | Box of 10 |
Every Draeger tube for this gas, with live prices: Water vapor detector tubes.
Draeger 8101781 questions
What does the Draeger 8101781 measure? Water vapor in air, measuring range 20 to 40 mg/L / 1 to 18 mg/L.
How many pump strokes does the 8101781 take? 1 /2 strokes (n) per the handbook, p. 278. Measuring time approx. 20 s / approx. 40 s.
Which pump does the 8101781 use? A Draeger tube pump: the accuro hand pump or the X-act 5000. Per the handbook (p. 28–29), Draeger short-term tubes and Draeger tube pumps are matched at the factory and form a single unit; using other pumps with Draeger tubes, or other tubes with Draeger pumps, can impair the measurement.
What is the color change on the 8101781? yellow → turquoise blue, read against the scale printed on the tube.
Do Draeger 8101781 tubes expire? Yes. Draeger prints an expiration date (month and year) on the package; the handbook states a typical shelf life for the customer of up to two years, stored sealed at the temperature on the package strip (handbook section 2.13).
How many tubes are in a box of 8101781? 10. Each tube is used once.
Guides: what Draeger tubes measure · pump strokes and measuring time · how to read a tube · expiration and storage · cross-sensitivity · all tubes by gas and range.
