Kotron® Sentinel II Models 822, 832 and 842 Point Level Switches
The Sentinel is a powerful multi-point level switch for alarm or control applications. The microprocessor-based circuitry permits calibration with only a small change in level. Push buttons and display permit ease in calibration and set up.
Measurement Principle:
As the media rises and falls in the tank, the amount of capacitance developed between the probe and the ground reference changes. The electronics convert the capacitance to a level. When the level reaches the desired setpoint, the relays will activate.