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Level control with daisy sensors

daisy sensor

  • Sensor for gravimetric silo level control
  • Contact-free – independent of bulk material geometry, dust and pressure
  • Easy to retrofit – without interrupting production
  • Operates like a weight measurement with load cells
  • High loading pressure of min. 10 N/mm² necessary
  • High repetition accuracy
  • Long term stability
  • Compatible with all full bridge strain gauge control units

 

 

Questionnaire  Data sheet

Description

The daisy sensor is a strain gauge recording very small elongations in steel constructions.

This sensor is ideally used in silos, tanks and other vessels with a own steel substructure. The sensor can be retrofitted at any time without interrupting the production process.

 

In contrast to conventional level control systems, the daisy-sensor is particularly suitable for bulk materials which are difficult to handle, e. g. truck pre-loading, level control in storage silos and tanks, elongation and tension measurements at steel constructions or overload and threshold signaling.

 

The sensors are retrofittable and can be installed even in partly filled silos without interrupting production. The measurements are characterised by high repetition accuracy and good long-term stability.

 

In order to avoid thermal influences due to solar radiation, among other things, the silo props can be provided with an easy-to-fit isolation.

Functioning

The daisy sensor is held in a force-locked manner on the respective steel construction via four screws.


Charging or discharging of the silo produces a mechanical load upon the base frame, thus generating a material deformation within the steel props, which is accurately recorded by the daisy-sensor.


Thereby a positive or negative change in resistance of the sensor bridge is triggered. A control unit connected in series, which ensures power supply at the same time, transforms the change in resistance into an electric output signal.


Different loads resulting from non-uniform charging or from strong winds in case of outdoor vessels can be almost completely compensated by means of parallel connection of several daisy-sensors in one measurement unit.