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Digital Microwave Moisture Measurement for Concrete, Asphalt and Process Industries from Hydronix
Hydro-Mix HT High Temperature Microwave Sensor - Dimensions

The Hydro-Mix HT is a microwave sensor designed to measure at high temperature in manufacturing industries that use drying, ducting, conveying and mixing systems during processing.


  • Body: 316 Stainless Steel (Food Safe)
  • Faceplate: Ceramic (Food Safe)
  • Internal Seals: FDA approved O-Rings


The Hydro-Mix HT is flush mounted with the internal wall using the included mounting assembly.

Analogue Outputs

Two configurable 0-20mA or 4-20mA current loop source available for moisture and temperature. May also be converted to 0-10V DC.

Digital Inputs/Output

Two configurable digital signals are provided for batch average start/stop or for moisture / temperature multiplexing purposes.

Digital (Serial) Communications

Opto-isolated RS485 2-wire port. Uses Hydro-Com communications protocol for read/write access to sensor parameters and values. RS232 converter, Ethernet and USB interfaces are also available.

Measurement Range

  • Moisture: 0-100%, material dependant.
  • Depth: Approx. 75-100mm, material dependant.

Operating Temperature


  • Continuous: 0-120°C
  • Intermittent: 120-130°C ≤10 minutes


  • 0-60°C

Refresh Rate

Outputs are updated 25 times per second.


The sensor is fitted with a 10-way MIL-SPEC connector. A 4, 10 or 25 metre, 6 twisted pair cable pre-assembled for connection to a waterproof junction box is available.

Power Supply

+15Vdc to +30Vdc. 4W