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Dial Instruments Pte Ltd
Level Measurement Solutions for Petrolchemical, Pharmaceutical,
Marine & General Industries
 
Subpage :: Masthead
Capacitive level sensors KRD

Capacitive level sensors KRD

CLSKRD

Description

Applications

Level measurement of liquids, solids, slurries and interface detection
 

Features

  • Various types available for different materials
  • Buildup prevention
  • Static electricity prevention
  • Remote installation
  • Suits a wide range of applications
  • Easy sensitivity adjustment
  • Local status indication
  • RoHS compliant model available (KRC)
 

Principle of Operation

Every substance has a unique dielectric constant (dK). The sensor uses the difference in dK between material and air or vacuum to determine material presence.
Different types of oscillation and detection circuits, as well as electrodes, are available to suit a wide range of materials and process conditions.

A parallel resonant circuit is used, where a high-frequency oscillation circuit and a synchronization (detection) circuit are separated. The detection circuit is synchronized with the oscillation frequency to create the largest high-frequency voltage.
When the measured material reaches the detection circuit, synchronization is broken, decreasing high-frequency voltage at the circuit.
This decreased voltage is rectified, and the decreased amount is dc amplified to give output signals.