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Key features
  • RS232 and RS485 digital outputs
  • Advanced digital communications including Modbus, Ethernet Modbus TCP/IP and PROFIBUS
Easy to use
Low cost of ownership
Unrivalled performance
Benchmark compliance

Designed specifically to work in harmony with the AquaXact 1688 ultra-thin film Aluminum Oxide moisture transmitter, this digital controller provides a high-clarity color touchscreen display, alarms, relays and advanced communications protocols. 

It gives AquaXact 1688 users access to powerful, intuitive software control, and allows easy sensor replacement in the field. The sensor tip can be replaced by the user and the calibration file loaded into the transmitter via the digital controller, removing the need for return-to-factory calibrations and thus lowering costs of ownership.

Dense Al2O3 pore structure and geometry provides the AquaXact sensor with greater stability and reduced drift over 12 months.


  • Dimensions of case 14 cm (H) x 20.5 cm (W) x 23 cm (D)  
  • 3200 grams
  • IEC 61010-1
  • Overvoltage Category II, Pollution Degree 2
  • EU EMC Directive
  • EU Low Voltage Directive
Key Applications
  • Air separation units
  • Natural gas processing and transportation
  • Glove boxes
  • Instrument air units
  • Ethylene production
  • Refining gases
  • Medical gases
  • Semiconductors
  • Furnace gas/heat treating
  • Power generation
  • Air dryers
  • Pharmaceutical
  • Aerospace
Service and Spares

Ensure your AquaXact 1688 Controller delivers optimum performance with Servomex Service Network.
Through our global network of engineers and service centers, we provide complete lifetime support for your device. Our services range from installation and commissioning to supplying high quality spares and arranging scheduled servicing: visit our Service Network pages to find out more.

Global Service Network