Description
The Draeger 6728981 is the Mercaptan 0.5/a detector tube, measuring range 0.5 to 5 ppm, 20 pump strokes, measuring time approx. 5 min (handbook). 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 Mercaptan.
Draeger 6728981 specifications
| Item | Draeger data |
|---|---|
| Part number | 6728981 |
| Gas or substance | Mercaptan |
| Tube type | 0.5/a |
| Measuring range | 0.5 to 5 ppm |
| Number of strokes (n) | 20 |
| Measuring time | approx. 5 min |
| Standard deviation | ± 10 to 15 % |
| Color change | white → yellow |
| Temperature | 10 to 40 °C |
| Humidity | 3 to 15 mg H2O/L |
| Reaction principle | 2 R-SH + Pd2+ → Pd(RS)2 + 2 H+ |
| 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), Dräger Safety AG & Co. KGaA.
Cross-sensitivity (handbook): Higher alkyl mercaptans (propyl and butyl mercaptan) are also indicated with roughly the same sensitivity. The indication is not affected by: 1000 ppm ethylene 2000 ppm carbon monoxide 200 ppm hydrogen sulfide Hydrogen sulfide discolors the pre-layer black.
Mercaptan exposure limits
| Limit | Value |
|---|---|
| OSHA PEL | C 10 ppm (20 mg/m³) |
| NIOSH REL | C 0.5 ppm (1 mg/m³) [15-minute] |
| NIOSH IDLH | 150 ppm |
| CAS number | 74-93-1 |
| Formula | CH₃SH |
| Conversion | 1 ppm = 1.97 mg/m³ |
Source: NIOSH Pocket Guide to Chemical Hazards, Methyl mercaptan (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 Mercaptan
| Part number | Tube | Measuring range | Pack |
|---|---|---|---|
| 8103281 | Draeger Mercaptan 0.1/a Detector Tubes, Box of 10 | 0.1 to 2.5 ppm / 3 to 15 ppm | Box of 10 |
| 8101871 | Draeger Mercaptan 20/a Detector Tubes, Box of 10 | 20 to 100 ppm | Box of 10 |
Every Draeger tube for this gas, with live prices: Mercaptan detector tubes.
Draeger 6728981 questions
What does the Draeger 6728981 measure? Mercaptan in air, measuring range 0.5 to 5 ppm.
How many pump strokes does the 6728981 take? 20 strokes (n) per the handbook. Measuring time approx. 5 min.
Which pump does the 6728981 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 6728981? white → yellow, read against the scale printed on the tube.
Do Draeger 6728981 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 6728981? 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.
