DPS3 High Performance, High Temperature Hygrometer

Featured Product from Edgetech Instruments Inc.

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The Model DPS3 is a heated dew point hygrometer that can measure dew/frost points up to 95°C (203°F) and as low as -35°C (-31°F). This integrated system includes a microprocessor based electronics, a chilled mirror dew/frost point sensor, a sample flow metering valve, a 3 foot heated sample line, assorted tubing and fittings; all contained in a heated, temperature controlled NEMA-4 enclosure.

The heated system allows the measurement of high dew points that are above ambient temperature. Without the heated system, condensation would occur and measurements could not be taken.

The DPS3 is ideal for applications including measuring the dew/frost point or moisture content in furnaces, heat treat systems, fuel cells, chemical reactors, fluidized bed dryers, centrifuges, getters, glass plants, RTP, and heated MAP systems.

The two-stage, primary method chilled mirror dew/frost point sensor in the DPS3 provides an accurate and fundamental measurement of the dew point of the sample gas.


  • Heated Sensor
  • Temperature Range: 20 to 99°C (68 to 210°F)
  • Dew/Frost Point Measurement Range: -35 to 95°C (-31 to 203°F)
  • Measurement Accuracy: ±0.2°C (±0.4°F)
  • Microprocessor Controlled
  • User Programmable Temperature Controller
  • Automatic Balance Control
  • Integral Adjustable Flowmeter
  • Two Available Alarm Relays
  • Selectable 4 to 20 mA, 0 to 5 Vdc or 0 to 10 Vdc Analog Outputs
  • RS232 Serial Interface
  • Sample Connection: ¼ inch Compression Fitting
  • Sample Pressure: Up to 150 psig
  • 3 foot (1m) Heated Hose Supplied
  • AC Power: 100 to 240 Vac, 50/60Hz, 250 W
  • Optional Pressure Transducer/Compensation

Edgetech Instruments designs and manufacturers accurate and reliable absolute humidity hygrometers, relative humidity transmitters, humidity probes, moisture and dew/frost point analyzers, relative humidity calibrators, dew/frost point generators and oxygen measurement instrumentation. Edgetech Instruments products are manufactured, calibrated and serviced to the highest industry standards in a modern, ISO/IEC 17025:2017 accredited, ISO 9001:2015 registered facility located in Hudson, Massachusetts. All certifications and calibrations are traceable to NIST.