Principle

The probe is mounted from the top of the vessel and it comprises of a sense electrode which is electrically isolated from the metallic tank by means of a suitable insulator. The sense electrode and the vessel wall serve as the two electrodes of a capacitor with the service material acting as the dielectric. A change in the material level causes a change in the dielectric, which in turn causes the value of this tank capacitor to change. An accurate measurement of this change affords an indirect measure of the level of the material in the tank.

Features

Microprocessor based system for higher degree of reliability and stable operation in noisy environments, made possible with the use of intelligent digital communication between the electronic insert and the evaluation unit

Calibration possible without completely filling and emptying the vessel

Three relays for programming three levels independently or as pump control logic

Three potential free change over relay output contacts

All parameters programmable via Five keys and Five multi-purpose LED displays

Galvanically isolated 4 to 20mA output available for connecting to PLC

Built-in universal power supply for 90 to 260 V AC or for 24 V DC operation.