Level Switch
Microwave Level Switch
The CMS210X type microwave level switch is a level switch consisting of a emitting unit and a receiving unit installed face to face. The emitting unit emits a continuous, low power microwave beam towards the receiving unit. If there is medium between emitting unit and receiving unit, the signal is damped. This change is detected by the build-in electronics module and converted into a switching command.
Tuning Fork Level Switch

An electronic circuit continuously excites the tuning fork, causing it to mechanically vibrate. When the prongs of the fork contact anything with substantial mass, the resonant frequency of the fork decreases. The circuit detects this frequency change and indicates the presence of mass contacting the fork.

Vibrating Rod Level Switch

The working principle of the rod type level switch is based on continuously vibrating a mechanical rod at its natural frequency. The working principle of the rod type level switch is the same as the vibrating fork level switch. The only difference is that a vibrating rod kept vibrating instead of tuning fork. A vibrating rod is kept in mechanical vibrations at its resonance frequency by piezo-electric crystals. When the service material covers the rod probe, vibrations are damped which is sense electronically and processed signal is used for switching.

RF Admittance Level Switch

The electrode rod of RF admittance level switch consists of measuring electrode, shielding electrode and grounding electrode. These three kinds of electrodes are isolated by insulating material. When the media touches the measuring electrode the admittance between the measuring electrode and the grounding electrode will increase and the media level changes can be judged by the change of admittance.

Microwave Capacitive Level Switch

The microwave capacitive level switch consists of a sensor, a metal housing and an internal electronic unit. An alternating electric field is generated at the tip of the sensor. When the sensor is covered by a media or the dielectric constant of the media to be measured changes, the capacitance of the sensor will change greatly. This change is detected by the internal electronic unit and converted into a switching command. This measurement method can eliminate the influence of adhesion effectively.

 

© Copyright 2018, Beijing Connetech LTD. All rights reserved.京ICP备14031084号-2