Process Moisture Measurement Devices

Achieve the highest accuracy and repeatability possible with the SONO-series of sensors, designed for measuring the moisture of industrial materials from wood chips to grains. The novel SONO series sensors are a new generation of moisture sensors, based on 25-years of sensor development know how, customer relations and manufacturing experience. Special attention was places on the material and construction of the SONO series sensors, with each sensor especially robust and suited for its intended application.

It is possible to integrate the SONO sensors into a wide array of various industrial plant types and locations. With standard interfaces, you can connect it to all existing control systems.

The SONO-SILO offers fast and smooth averaged moisture output values (4 per second) allow for accurate real-time moisture values even from batch operation. Select one of our standard material calibrations, stored in the sensor, or develop your own calibration.

SONO sensors are truly user friendly and intelligent. Measured values are pre-processed using algorithms and filters with all setting being selectable and adjustable. Simulation of the analog output is simple and commonly used during commissioning. As a sensor’s face wares due to abrasion the automatic measurement compensation feature offers significantly longer operating periods without the necessity of recalibration. When a SONO sensor requires service, only the sensor’s head needs to be replaced.

Interfacing to PLC-based control system is simple using the analog output. The most common analog output is a current loop 4…20mA or a voltage of 0…5 or 0….10 VDC, scaled to 0…100% moisture. Selection of any calibration, analog output, range scale and all other settings needed for setup, adjustment and simulation can be accessed using the SONO-VIEW menu. The SONO-VIEW can be wired to up to 12 SONO sensors, to display the individual sensor’s moisture reading. If a local display in not required then the optional USB interface module, a notebook computer and free software will give you access to all the same settings, adjustments and parameters, available in the SONO-VIEW.

All SONO sensors use TRIME® TDR-method for moisture measurement, more commonly known as Guided Wave Radar or Cable Radar. Cable Radar uses a high frequency low voltage pules that travels along a radar track, imbedded in the surface of a SONO sensor. The pulses travel close to the speed of light generating a measurement field that propagates in slices out from the sensor’s surface, similar to computer tomographic (CT-scan) but for moisture measurement.

Uniquely the measurement field of SONO sensor adapts to the material being measured. Fine materials tend to contain the measurement field. Larger materials to expand measurement field which penetrates further into the material volume. By selecting a material specific calibration materials or all size and shape can be measured. In addition to the adaptive measurement field feature, cable radar and SONO sensor electronics are not influence by material temperature or color.

Details on each product version can be found in the "Data Sheet" and "Technical Manual" links on this page!

SONO-VARIO for Bulk Materials

The SONO-VARIO — for precise moisture and temperature measurements of bulk materials.

SONO-VARIO LD for Granular Materials

The SONO VARIO LD is designed for precise moisture and temperature measurements of bulk granular materials with large particle size.

SONO-GS1 for Low density

The SONO-GS1 measures moisture and temperature of Low Density bulk goods. Suitable for products having larger particle sizes

TRIME GW for Grains

The TRIME GW measures material moisture in organic or inorganic materials in industrial process dryers.


The SONO-VIEW is a smart stand-alone display/interface to any SONO-sensor

SONO-Config software for setting up any SONO moisture sensor

Free utility software for selecting a calibration, averaging method and time, making offset adjustments and simulating the sensor’s analog outputs to a control system.

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