Compressed Air Measurement

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Optimize your compressed air quality with the right dew point instrument

Compressed air that is clean and dry can be ensured by accurate dew point measurement instruments. By using stable dew point measurement you can also avoid over-drying and save energy.

The measurement instruments must withstand exposure to a number of contaminants like water spikes, ambient humidity, compressor oil, and chemical impurities. Vaisala sensors can handle all of the above. What’s more, they have the fastest wet-to-dry response time on the market and minimal drift allowing for a 2-year calibration interval.

Dew point measurement combined with pressure measurement offers further unique advantages. When dew point data is coupled with live pressure input, conversions to atmospheric pressure or ppm are available online leaving no ambiguity in the information. As an example, regulative requirements of medical gas can be fulfilled easily and quickly. As a market first, Vaisala now has a product specifically designed to meet this need. The Vaisala Dew point and Pressure Transmitter DPT146 is especially well suited for demanding compressed air applications.

Facts and Figures

  • Stable instruments
  • Fastest wet-to-to dry response time on the market
    Vaisala dew point transmitters incorporate the DRYCAP® sensor for which it takes just minutes to reach an accurate reading after a step change from ambient humidity to a -40°C dew point. 
  • High resistance to contamination
    DRYCAP® sensor is immune to compressor oil and most other chemical contaminants. 
  • Long 2-year calibration interval
    Stable polymer material, advanced auto-calibration and purge features keep the sensor stable for a record time.
  • Easy calibration services
  • Wide variety of instruments
    Lightweight hand-held instruments, configurable &  customized fixed mount transmitters, OEM models and as a market first, a model which combines dew point and pressure measurement.
  • With accurate dew point measurement you can reduce energy consumption by up to 20%.
Firefighters with Oxygen Tanks

Breathing Air Measurement

Bottled/compressed air is used as breathing gas in a number of critical applications such as medical & hospital air and self contained breathing apparatus for rescue personnel.  Dew point monitoring is required for compliance with most medical gas and breathing air regulations. Stringent control guarantees safe breathing conditions for hospital patients and firefighters.

Vaisala offers various dew point transmitters ideal for monitoring breathing air with dew points down to  -80°C and pressures up to 50 bar.

Plastic Molding

Plastics Drying

Dryer performance is critical when moisture sensitive materials, such as PET resin and nylon, are dried prior to molding. Dew point measurement can be used to monitor a dryer’s performance or conditions in the hopper, assuring that the drying process remains within specification. 

Vaisala has a range of stable and reliable dew point transmitters both for OEM configurations as well as for end users.

For those who prefer a direct measurement of humidity or dew point temperature within the hopper, which can correlate to moisture content of the material in the hopper, Vaisala offers a portable sampling system DSS70A to be used with a hand-held meter DM70.

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