How to measure dew point in Nitrogen

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Dewpoint measurement is critical at two points in the process:-

  1. Measuring Moisture/Dewpoint after the dryer provides a warning if the dryer malfunctions, protecting the generator from damaging condensate.
  2. Measuring the Moisture/Dewpoint of the Nitrogen generated is an essential part of quality control.

Continuous online measurement of Moisture/Dewpoint is recommended in this application using a Dewpoint Transmitter such as Alpha Moisture Systems’ AMT or PDT Dewpoint Transmitters and a Dewpoint Hygrometer such as the DS1200 or the DS4000.

Ideally, the gas should be sampled at atmospheric pressure with a flow rate of around 1-5 L/min; we can identify and supply ancillary items such as a sensor holder, valves and regulators and sampling systems of all sizes etc.

Many Nitrogen Generator installations now incorporate Dewpoint Measurement as part of their original equipment supply; Alpha Moisture Systems can provide the engineering support required to add this feature to your equipment.

Our latest Portable Dewpoint Hygrometer Model SADPmini2 is recommended for system functionality periodic spot checks.


Alpha Moisture Systems are manufactures and global distributors of dew point instrumentation, and also provide a design service for sampling systems etc. – see our website amsystems.co.uk for more details.