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

The Hydro-Mix is a rugged microwave sensor designed to measure moisture in manufacturing industries that use mixers and blenders during processing. Typical applications that use this sensor are aggregates, concrete and asphalt production.


  • Body: Stainless Steel
  • Protection Ring : Hardened Steel
  • Faceplate: Ceramic


The Hydro-Mix is secured to a fixing plate by a clamp ring. This allows the height of the sensor to be adjusted if necessary.

Analogue Outputs

2 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

2 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. Ethernet and USB interfaces are also available.

Moisture Range

The sensor will measure up to saturation of material.

Material Penetration

Approximately 75-100mm dependent on material.

Operating Temperature

0-60 degrees C. The sensor will not measure in ice.

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