Description
The Draeger CH21101 is the Trichloroethane 50/d detector tube, measuring range 50 to 600 ppm, 2 + 3 desorption strokes pump strokes, measuring time approx. 1.5 min (handbook, p. 270). Sold by the box of 5, 5 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 Trichloroethane.
Draeger CH21101 specifications
| Item | Draeger data |
|---|---|
| Part number | CH21101 |
| Gas or substance | Trichloroethane |
| Tube type | 50/d |
| Measuring range | 50 to 600 ppm |
| Number of strokes (n) | 2 + 3 desorption strokes |
| Measuring time | approx. 1.5 min |
| Standard deviation | ± 10 to 15 % |
| Color change | gray → brown-red |
| Temperature | 15 to 40 °C |
| Humidity | 5 to 15 mg H2O/L |
| Reaction principle | a) 1,1,1-trichloroethane + IO3– / H2S2O7 → chlorine b) Chlorine + o-tolidine → brown-red reaction product |
| Pack | Box of 5 |
| 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. 270, Dräger Safety AG & Co. KGaA.
Cross-sensitivity (handbook, p. 270): Other chlorinated hydrocarbons are also indicated, but with different sensitivities. The reading is too low in the presence of aromatic hydrocarbons, e.g., the reading for 200 ppm 1,1,1-trichloroethane and 200 ppm toluene is just 1/4, i.e., 50 ppm.
Trichloroethane exposure limits
| Limit | Value |
|---|---|
| OSHA PEL | TWA 350 ppm (1900 mg/m³) |
| NIOSH REL | C 350 ppm (1900 mg/m³) [15-minute] (Chloroethanes) |
| NIOSH IDLH | 700 ppm |
| CAS number | 71-55-6 |
| Formula | CH₃CCl₃ |
| Conversion | 1 ppm = 5.46 mg/m³ |
Source: NIOSH Pocket Guide to Chemical Hazards, Methyl chloroform (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.
Draeger CH21101 questions
What does the Draeger CH21101 measure? Trichloroethane in air, measuring range 50 to 600 ppm.
How many pump strokes does the CH21101 take? 2 + 3 desorption strokes strokes (n) per the handbook, p. 270. Measuring time approx. 1.5 min.
Which pump does the CH21101 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 CH21101? gray → brown-red, read against the scale printed on the tube.
Do Draeger CH21101 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 CH21101? 5. 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.
