Drager Short Term Detection Tubes - Mercaptan 20/a (Pack of 10)
Drager Short Term Detection Tubes - Mercaptan 20/a (Pack of 10)

Product Code - 8101871

exc VAT £72.40 inc VAT £86.88
Drager Detection Tubes - Mercaptan 20/a (Pack of 10)
Description / Features / Spec


Drager Detection Tubes - Mercaptan 20/a (Pack of 10)

These short-term detection tubes are for Mercaptan (20/a) and have a measurement range of 20 to 1000 ppm.  It can detect additional substances such as methyl mercaptan and phenylmercaptan.

It has a shelf life of 2 years and comes in a pack of 10 tubes.

Click here to view more information on the compatible Drager Accuro Gas Detection Pump for short-term detection tubes.

Key Features

  • Designed for short-term, on-the-spot measurement
  • Can take between 10 seconds to 15 minutes to gather a reading
  • Applications may include concentration fluctuations in the workplace, measurement of contaminants in breathing zone, and confined spaces
  • Can be used as pre-entry checks


Application Range  
Standard Measuring Range: 20 to 100 ppm
Number of Strokes n: 10
Time for Measurement: approx. 2.5 min
Standard Deviation: ± 10 to 15 %
Color Change: white --> yellow brown
Ambient Operating Conditions  
Temperature: 0 to 50 °C
Absolute Humidity: 3 to 30 mg H2O / L
Reaction Principle  
a) 2 R-SH + Cu2+ --> Cu(RS)2 + 2 H+
b) Cu(RS)2 + S --> yellow brown copper compound
Cross Sensitivity
Higher molecular weight alkyl mercaptans (e.g. propyl- and butylmercaptans) are indicated with approximately the same sensitivity. Hydrogen sulfide is indicated with approximately twice the sensitivity of the mercaptans (e.g. 10 ppm hydrogen sulfide gives an indication of 20 ppm). In presence of Hydrogen Sulfide a measurement of mercaptans is impossible.
Additional Information
After performing the required ten pump strokes the reagent ampoule must be broken. The liquid of the ampoule must be transferred to the indicating layer and carefully drawn through it using the pump. After completing the measurement wait for 3 min prior to evaluation.

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