Description
The Draeger CH20701 is the Chlorine 50/a detector tube, measuring range 50 to 500 ppm, 1 pump strokes, measuring time approx. 20 s (handbook, p. 154). 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 Chlorine.
Draeger CH20701 specifications
| Item | Draeger data |
|---|---|
| Part number | CH20701 |
| Gas or substance | Chlorine |
| Tube type | 50/a |
| Measuring range | 50 to 500 ppm |
| Number of strokes (n) | 1 |
| Measuring time | approx. 20 s |
| Standard deviation | ± 10 to 15 % |
| Color change | gray-green → orange-brown |
| Temperature | 10 to 40 °C |
| Humidity | less than 40 mg H2O/L |
| Reaction principle | Cl2 + o-tolidine → orange-brown 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. 154, Dräger Safety AG & Co. KGaA.
Cross-sensitivity (handbook, p. 154): Bromine is indicated with the same sensitivity, but with a larger standard deviation (± 25 to 30 %). Chlorine dioxide and nitrogen dioxide are also indicated, but with a different sensitivity.
Chlorine exposure limits
| Limit | Value |
|---|---|
| OSHA PEL | C 1 ppm (3 mg/m³) |
| NIOSH REL | C 0.5 ppm (1.45 mg/m³) [15-minute] |
| NIOSH IDLH | 10 ppm |
| CAS number | 7782-50-5 |
| Formula | Cl₂ |
| Conversion | 1 ppm = 2.90 mg/m³ |
Source: NIOSH Pocket Guide to Chemical Hazards, Chlorine (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 Chlorine
| Part number | Tube | Measuring range | Pack |
|---|---|---|---|
| CH24301 | Draeger Chlorine 0.2/a Detector Tubes, Box of 10 | 0.2 to 3 ppm / 3 to 30 ppm | Box of 10 |
Every Draeger tube for this gas, with live prices: Chlorine detector tubes.
Draeger CH20701 questions
What does the Draeger CH20701 measure? Chlorine in air, measuring range 50 to 500 ppm.
How many pump strokes does the CH20701 take? 1 strokes (n) per the handbook, p. 154. Measuring time approx. 20 s.
Which pump does the CH20701 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 CH20701? gray-green → orange-brown, read against the scale printed on the tube.
Do Draeger CH20701 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 CH20701? 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.
