Servomex ServoPro AQUAXACT 1688



Servomex – Dew Point and ppm H2O Measurements

The AquaXact 1688 is a rugged, ultra-thin film Aluminum Oxide moisture sensor that enables fast and accurate dew point and ppm H2O measurements of moisture in a wide variety of gas phase process applications.

Not only is it a standalone 4-20mA transmitter, but it is also able to be remotely interfaced to the SERVOPRO MonoExact DF310E and the AquaXact 1688 digital controller. The controller provides a high-clarity color touchscreen display, alarms, relays and advanced communication protocols including RS485, Modus RDU, Modbus TCP/IP and PROFIBUS. Optional internal oxygen sensors provide ppm to percent level O2 measurement capabilities.

  • Dew point range -100°C to +20°C
  • Functions as a standalone dew point transmitter – 4-20 mA loop-powered
  • Range of engineering units: °C, °F, ppmV



4-20 mA



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