Detection tube system
October 1st 2005

Anachem’s Gastec offers cost effective detection of more than 500 gases and vapours.

The detection tube system provides employees with a portable device that gives an instant, on-thespot reading within hazardous environments.

Easy-to-use, it accurately measures gases and vapours from ppb/ppm to % volume values.

Comprising a Gastec precision piston sampling pump and standard detector tubes, the handheld, cylindrical pump delivers precise volumes using a vacuum.

Gastec detector glass tubes are filled with an absorbent material, such as silica gel, impregnated with a chemical reagent that reacts with the target gas. A Gastec tube is inserted in the sampling pump and air is drawn through the tube. Only one pump stroke is required on average for an accurate reading.

Sampled air reacts in the presence of the target gas to produce a colour change. The length of the colour stain is proportional to the concentration of gas present.