AcuDew Dewpoint Transmitter

Designed for the measurement of trace moisture in process gases and dry compressed air.

The AcuDew dewpoint transmitter is fully compatible with the range of single channel displays, which include:

The SHAW AcuDew high performance dewpoint transmitter. A robust and reliable, 2 wire, 4-20 mA loop powered transmitter.

Utilising the ultra high capacitance SHAW moisture sensing technology, the AcuDew offers superior sensitivity, accuracy, repeatability and speed of response.

This dewpoint transmitter incorporates the SHAW AutoCal feature. AutoCal allows users to check the span of the instrument and correct for any deviation between annual laboratory calibrations. Notably, you can AutoCal dewpoint instruments in situ and without the need for skilled personnel or special equipment.

Various dewpoint ranges are available covering an overall range from -120 °C to +20 °C (-184 °F to +68 °F) dewpoint and output units are configurable in °C dewpoint, °F dewpoint, ppm(V), ppb(v), g/m³ and lb/MMSCF.

Built of stainless-steel, its strong construction includes an industrial M12 connector. SHAW designed the dewpoint transmitter to withstand extreme environmental conditions and harsh environments, manufacturing the AcuDew with a protection rating of IP66 (NEMA 4X). The M12 connector reduces the setup time, saving you time when installing and maintaining wiring systems.

The AcuDew dewpoint transmitter provides a linear, 4 – 20 mA signal over the chosen measurement range and is loop powered by a 7-28 V DC source (24 V option is available). If your requirement includes installation in a remote location, the 4-20 mA signal is ideal for data transmission over long distances (up to 1,000 metres (3,280 feet)) without signal degradation. Additional benefits of a 4-20 mA current loop include: resilience against any background electrical noise and easy fault detection if the loop is broken.

Whether you wish to install the dewpoint transmitter directly in to the process line or combine as part of a sample conditioning system, the AcuDew is easy to operate and requires little or no maintenance.

Our dewpoint transmitter is tested to withstand pressures up to 35,000kPA (350 bar) and can be connected directly into pipelines. Another key point is the absence of controls to operate during use, this is because we designed the AcuDew for long term unattended operation.

The AcuDew is supplied ready to use with a Certificate of Calibration traceable to National and International Humidity Standards, instruction manual and two metres of cable.

Key features of the AcuDew dewpoint transmitter

  • Shaw brand accurate held hygrometer
    2 wire, loop powered, 4-20 mA dewpoint transmitter
  • Shaw brand accurate held hygrometer
    Various ranges available: overall range of -120 °C to +20 °C (-184 °F to +68 °F) dewpoint
  • Shaw brand accurate held hygrometer
    Accuracy ±2 °C (±3.6 °F) dewpoint
  • Shaw brand accurate held hygrometer
    Output configurable in °C dewpoint, °F dewpoint, ppm(V), ppb(v), g/m³ and lb/MMSCF
  • Shaw brand accurate held hygrometer
    AutoCal (automatic calibration) feature
  • Shaw brand accurate held hygrometer
    Open/short circuit detection
  • Shaw brand accurate held hygrometer
    Weatherproof rating IP66 (NEMA 4X)
  • Shaw brand accurate held hygrometer
    Fully compatible with the single channel displays: AcuLoop, AcuVu, AcuTrak and SU4 Sample System
Shaw SDT 4-20 mA dewpoint transmitter,process gas compressed air

Various ranges

Various dewpoint ranges are available, covering an overall range from -120 °C to +20 °C (-184 °F to +68 °F) dewpoint. We have colour coded all ranges for easy reference.

dewpoint transmitter, AutoCal, AcuDew, Shaw Moisture Meters, 4-20 mA loop powered


The most important and unique feature of the SHAW system is the AutoCal (automatic calibration) function… (read more)

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