Description
The Draeger CH31901 is the Ammonia 0.5%/a detector tube, measuring range 0.5 to 10 Vol%, 1 + 1 desorption stroke pump strokes, measuring time approx. 20 s/stroke (handbook, p. 130). 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 Ammonia.
Draeger CH31901 specifications
| Item | Draeger data |
|---|---|
| Part number | CH31901 |
| Gas or substance | Ammonia |
| Tube type | 0.5%/a |
| Measuring range | 0.5 to 10 Vol% |
| Number of strokes (n) | 1 + 1 desorption stroke |
| Measuring time | approx. 20 s/stroke |
| Standard deviation | ± 10 to 15 % |
| Color change | yellow → purple |
| Temperature | 10 to 30 °C |
| Humidity | 3 to 12 mg H2O/L |
| Reaction principle | NH3 + 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. 130, Dräger Safety AG & Co. KGaA.
Cross-sensitivity (handbook, p. 130): Other basic substances, e.g., organic amines, are also indicated.
Measuring range extension (handbook, p. 130): Measuring range 0.05 - 1 Vol% where n = 10 strokes + 1 desorption stroke in clean air, divide indicated scale value by 10.
Ammonia exposure limits
| Limit | Value |
|---|---|
| OSHA PEL | TWA 50 ppm (35 mg/m³) |
| NIOSH REL | TWA 25 ppm (18 mg/m³) ST 35 ppm (27 mg/m³) |
| NIOSH IDLH | 300 ppm |
| CAS number | 7664-41-7 |
| Formula | NH₃ |
| Conversion | 1 ppm = 0.70 mg/m³ |
Source: NIOSH Pocket Guide to Chemical Hazards, Ammonia (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 Ammonia
| Part number | Tube | Measuring range | Pack |
|---|---|---|---|
| 8101711 | Draeger Ammonia 0.25/a Detector Tubes, Box of 10 | 0.25 to 3 ppm | Box of 10 |
| 6733231 | Draeger Ammonia 2/a Detector Tubes, Box of 10 | 2 to 30 ppm | Box of 10 |
| 8101301 | Draeger Ammonia 20/a-D Detector Tubes, Box of 10 | 20-1,500 ppm in 1 h (down to 2.5-200 ppm in 8 h) | Box of 10 |
| CH20501 | Draeger Ammonia 5/a Detector Tubes, Box of 10 | 5 to 70 ppm / 50 to 700 ppm | Box of 10 |
| 8101941 | Draeger Ammonia 5/b Detector Tubes, Box of 10 | 5 to 100 ppm | Box of 10 |
Every Draeger tube for this gas, with live prices: Ammonia detector tubes.
Draeger CH31901 questions
What does the Draeger CH31901 measure? Ammonia in air, measuring range 0.5 to 10 Vol%.
How many pump strokes does the CH31901 take? 1 + 1 desorption stroke strokes (n) per the handbook, p. 130. Measuring time approx. 20 s/stroke.
Which pump does the CH31901 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 CH31901? yellow → purple, read against the scale printed on the tube.
Do Draeger CH31901 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 CH31901? 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.
