SDT-Ex Intrinsically Safe Dewpoint Transmitter

Shaw Moisture Meters intrinsically safe dewpoint transmitter, the Model SDT-Ex, is designed to meet the stringent demands of industrial applications.

SDT-Ex Intrinsically Safe Dewpoint Transmitter Picture

Manufacture: Shaw Moisture Meters
Model: Model SDT-Ex Intrinsically Safe Dewpoint Transmitter

Compact, 3 wire, 4-20 mA , the Model SDT-Ex is certified intrinsically safe to ATEX: Ex II 1 GD Ex ia IIC T4 Ga (-20 °C ≤ Ta ≤ +60 °C) and IECEx: Ex ia IIIC T200135 °C Da (-20 °C ≤ Ta ≤ +60 °C) for use in hazardous areas using a signal isolator.

Incorporating advanced electronics, this intrinsically safe dewpoint transmitter derives its power from 7 – 28 V DC non-isolated power source and is configured to output a linear, isolated, 4-20 mA signal for distances up to 1,000 metres (3,280 ft).


  • 3 wire, 24 V, 4 – 20 mA dewpoint transmitter
  • Intrinsically safe to ATEX and IECEx standards
  • Overall range: -100 °C to +20 °C (-148 °F to +68 °F) dewpoint
  • Output configurable in °C dewpoint, °F dewpoint, ppm(v), g/m³ and lb/MMSCF
  • Accuracy ±2 °C (±3.6 °F) dewpoint
  • Weatherproof rating IP66 – NEMA 4X
  • Open/short circuit detection
  • Linear 4 – 20 mA output signal
  • Self-contained, robust and reliable
  • Supplied with Calibration Certificate traceable to National & International Humidity Standards