Description
The Draeger CH31801 is the Hydrazine 0.25/a detector tube, measuring range 0.25 to 10 ppm / 0.1 to 5 ppm, 10 / 20 pump strokes, measuring time approx. 1 min / approx. 2 min (handbook, p. 189). 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 Hydrazine.
Draeger CH31801 specifications
| Item | Draeger data |
|---|---|
| Part number | CH31801 |
| Gas or substance | Hydrazine |
| Tube type | 0.25/a |
| Measuring range | 0.25 to 10 ppm / 0.1 to 5 ppm |
| Number of strokes (n) | 10 / 20 |
| Measuring time | approx. 1 min / approx. 2 min |
| Standard deviation | ± 10 to 15 % |
| Color change | yellow → blue |
| Temperature | 10 to 50 °C |
| Humidity | less than 20 mg H2O/L |
| Reaction principle | N2H4 + pH indicator → 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. 189, Dräger Safety AG & Co. KGaA.
Cross-sensitivity (handbook, p. 189): Other alkaline substances such as organic amines and ammonia are also indicated but with different sensitivities.
Hydrazine exposure limits
| Limit | Value |
|---|---|
| OSHA PEL | TWA 1 ppm (1.3 mg/m³) [skin] |
| NIOSH REL | Ca C 0.03 ppm (0.04 mg/m³) [2-hour] |
| NIOSH IDLH | Ca [50 ppm] |
| CAS number | 302-01-2 |
| Formula | H₂NNH₂ |
| Conversion | 1 ppm = 1.31 mg/m³ |
Source: NIOSH Pocket Guide to Chemical Hazards, Hydrazine (OSHA PEL from 29 CFR 1910.1000 Table Z as listed there). TWA = 8-hour time-weighted average, ST = short-term (15-minute), C = ceiling, Ca = NIOSH potential occupational carcinogen.
Other Draeger tubes for Hydrazine
| Part number | Tube | Measuring range | Pack |
|---|---|---|---|
| 8103351 | Draeger Hydrazine 0.01/a Detector Tubes, Box of 10 | 0.01 to 0.4 ppm / 0.5 to 6 ppm | Box of 10 |
Every Draeger tube for this gas, with live prices: Hydrazine detector tubes.
Draeger CH31801 questions
What does the Draeger CH31801 measure? Hydrazine in air, measuring range 0.25 to 10 ppm / 0.1 to 5 ppm.
How many pump strokes does the CH31801 take? 10 / 20 strokes (n) per the handbook, p. 189. Measuring time approx. 1 min / approx. 2 min.
Which pump does the CH31801 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 CH31801? yellow → blue, read against the scale printed on the tube.
Do Draeger CH31801 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 CH31801? 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.
