Description
The Draeger CH31701 is the Sulfur dioxide 1/a detector tube, measuring range 1 to 25 ppm, 10 pump strokes, measuring time approx. 3 min (handbook, p. 259). 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 Sulfur dioxide.
Draeger CH31701 specifications
| Item | Draeger data |
|---|---|
| Part number | CH31701 |
| Gas or substance | Sulfur dioxide |
| Tube type | 1/a |
| Measuring range | 1 to 25 ppm |
| Number of strokes (n) | 10 |
| Measuring time | approx. 3 min |
| Standard deviation | ± 10 to 15 % |
| Color change | gray-blue → white |
| Temperature | 15 to 25 °C |
| Humidity | 3 to 20 mg H2O/L |
| Reaction principle | SO2 + I2 + 2 H2O → H2SO4 + 2 HI |
| 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. 259, Dräger Safety AG & Co. KGaA.
Cross-sensitivity (handbook, p. 259): Hydrogen sulfide is retained in the pre-layer, so has no effect at concentrations around the OEL. Nitrogen dioxide shortens the reading.
Sulfur dioxide exposure limits
| Limit | Value |
|---|---|
| OSHA PEL | TWA 5 ppm (13 mg/m³) |
| NIOSH REL | TWA 2 ppm (5 mg/m³) ST 5 ppm (13 mg/m³) |
| NIOSH IDLH | 100 ppm |
| CAS number | 7446-09-5 |
| Formula | SO₂ |
| Conversion | 1 ppm = 2.62 mg/m³ |
Source: NIOSH Pocket Guide to Chemical Hazards, Sulfur dioxide (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 Sulfur dioxide
| Part number | Tube | Measuring range | Pack |
|---|---|---|---|
| 6727101 | Draeger Sulfur Dioxide 0.1/a Detector Tubes, Box of 10 | 0.1 to 3 ppm | Box of 10 |
| 6728491 | Draeger Sulfur Dioxide 0.5/a Detector Tubes, Box of 10 | 1 to 25 ppm / 0.5 to 5 ppm | Box of 10 |
| CH24201 | Draeger Sulfur Dioxide 20/a Detector Tubes, Box of 10 | 20 to 200 ppm | Box of 10 |
| 8101531 | Draeger Sulfur Dioxide 50/b Detector Tubes, Box of 10 | 400 to 8000 ppm / 50 to 500 ppm | Box of 10 |
Every Draeger tube for this gas, with live prices: Sulfur dioxide detector tubes.
Draeger CH31701 questions
What does the Draeger CH31701 measure? Sulfur dioxide in air, measuring range 1 to 25 ppm.
How many pump strokes does the CH31701 take? 10 strokes (n) per the handbook, p. 259. Measuring time approx. 3 min.
Which pump does the CH31701 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 CH31701? gray-blue → white, read against the scale printed on the tube.
Do Draeger CH31701 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 CH31701? 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.
