SONO-VARIO: The Universal Moisture Sensor featuring RbC
Precise moisture and temperature measuring for bulk materials – also suited for applications which conventional sensors can not handle. Ideal for the measurements of sand moisture and gravel moisture. Easy to integrate into containers, hoppers and silos.

SONO-VARIO Standard: The Universal Moisture Sensor featuring RbC.
The exact solution for:

  • Bulk Materials Industry
  • Chemical- and Pharmaceutical Industry
  • Construction Industry
  • Food Industry
  • Feed Production
  • Glass-Ceramic Industry

    SONO-VARIO Standard is suited for measuring of abrasive materials like Sand and gravel. The probe head consists of stainless steel with a rectangular ceramic window.

  • Higher reliability at the measurement of sand moisture and gravel moisture or other complex materials. The TRIME technology guarantees precise measurements even under difficult conditions (e.g., if water and sand are charged with minerals with up to 12dS/m pore water conductivity). The additionally measured radar-based conductance (RbC – Radar based Conductance)enables conclusions regarding further parameters of the material recipe. For you, this has the following effect: improved quality control, more safety and less recipe errors.
  • Highest Reliability in comparison to Microwave probes, SONO probes provide accurate measurement values even when aggregates are exposed to steam in winter and where the sand and the gravel feature differing grain sizes.
  • Even in the event of abrasion at the probe head, the automatic measurement compensation enables significantly longer operating periods without the necessity of recalibration.
  • The intelligent pre-processing of the measurement values featuring smooth mean value accumulation, adjustable filters, and up to 15 calibration curves for the calibration which is already conducted in the sensor itself. Usually, external evaluation devices are not required.
  • Two variably adjustable analogue outputs 0(4)...20mA allow for the easy connection to any currently existing control system.
  • A RS485 interface enables network operation of the sensor. It already contains a data bus protocol for the connection of several SONO sensors. The connection of the sensor to industrial buses such as Profibus, Ethernet, etc. is possible via optional external modules (available upon request).

Sensor Design
Casing: High Grade Steel V2A 1.4301
SONO-VARIO Standard: The surface consists of highly abrasion-resistant aluminium oxide ceramic.
SONO-VARIO PTFE: The surface consists of 15mm PTFE.
A high-temperature version is available upon request!
SONO-VARIO Standard: 108 x 45mm (Diameter x Length)
SONO-VARIO PTFE: 108 x 65mm (Diameter x Length)
The mounting flange can be screwed on to the rear side of any container, hopper or silo.
Measurement Range Moisture
The sensor measures from 0% up to the point of material saturation. Measurement ranges up to 90% moisture are possible with a material specific calibration.
Measurement Range Conductivity
The sensor, as a material-specific characteristic value, delivers the radar-basedconductance (RbC – Radar-based-Conductance) in a range of 0…12dS/m. Theconductivity range is reduced in measurement ranges >50%.
Measurement Range Temperature
Measurement Range: 0°C ...100°C
The temperature is measured at the ceramic disc inside the sensor casing and isissued at the analogue output 2. The material temperature can be measured withan external calibration and compensation of the sensor intrinsic-heating.
Measurement Data-Preprocessing
MEASUREMENT MODE CA: (Cyclic-Average) For relative short measuring processes with continual average value, filtering and an accuarcy of up to 0.1%.
MEASUREMENT MODE CF: (Cyclic-Float-Average) For very slow measuring processes with floating average value, filtering and an accuarcy of up to 0.1%.
MEASUREMENT MODE CS: (Cyclic-Successive) For very short measuring processes without floating average with internal up to 100 measurements per second and a cycle time of 200 milliseconds at the analogue output.
Power Supply
+7V to +30V DC, 1,5 W max.
Ambient Conditions
0 - 70°C; A higher temperature range is available upon request!
Signal Output
2 x Analogue Outputs 0(4)…20mA
Output 1: Moisture in % (variably adjustable)
Output 2: Conductivity (RbC) or optionally the temperature.
In addition, there is the option to split the analogue output 2 into two ranges: into4..11mA for the temperature and 12..20mA for the conductivity. The analogueoutput 2 hereby changes over into an adjustable one-second cycle betweenthese two (current) measurement windows.
The two analogue outputs can be variably aligned with the SONO-CONFIG software. For a 0-10V DC voltage output, a 500R resistor can be installed.
The sensor is provided with a universal calibration. A maximum of 15 different calibrations can be stored. For special materials, variable calibrations with polynomials up to the 5th order are possible and can be downloaded into the sensor with the SONO-CONFIG software. A zero point correction can be performed easily with the SONO-CONFIG software.
A RS485 interface enables network operation of the sensor, whereby a databus protocol for the connection of several SONO sensors to the RS485 is implemented by default. The connection of the sensor to industrial buses such as Profibus, Ethernet, etc. is possible via optional external modules (available upon request).
Connector Plug
The sensor is equipped with a robust 10-pole MIL flange connector. Ready made connection cables with MIL connectors are available in the lengths 4m, 10m, or 25 m.
Measurement Field Expansion
Approximately 50 - 80 mm, depending on material and moisture.

peterbeton GmbH & Co. KG Kies- und Betonwerke