To measure the 'spot concentrations' of water vapour for use with an Accuro® pump.

Uses include determination and measurement of concentration peaks, measurement of personal exposure in the inhalation area, detection of leaks in pipelines or gas installations.

One stroke is equivalent to a volume of 100 ±5 ml of gas passing through the tube.

The standard measuring range is calibrated at 20 °C and 1013 hPa.