Intelligent and Self Checking
A microprocessor checks the complete system and itself before validating the signal. A flashing green LED serves as a heartbeat to indicate a healthy system In the event of occurrence of a system fault such as incorrect wiring, open or short sensor connection, failure of probe insulation, improper grounding or electronic insert failure, the heartbeat stops, fault LED glows, display indicates "E---" and the relay contacts revert to their fail-safe condition.

Highly Reliable
Two-wire Pulse Frequency Modulation (PFM) is used for interference-free signal transmission between probe and evaluation unit.
Complete system is checked before each measurement. Auto compensation for temperature drift in the vicinity of pre-amplifier.

High Degree of Programmability
Features such as operating mode (independent/pump control), delayed switching in seconds for probe covered or uncovered condition, fail-safe high or low, switching sensitivity and set point calibration are programmable via key pad. The programmed parameters are stored in a non-volatile memory indefinitely requiring no battery backup.

Ignores Build-Up
Special three-element probe and immunocoat circuitry enables the system to ignore coating on the probe, build-up from wall and suspended dust particles, but reacts only to a true level.

Easy Calibration and User-Friendly
All parameters are programmed via four keys and an interactive menu-driven display leaving no chance for incorrect entry. If recalibration is required, the old data is displayed in the program mode, which can be edited as desired.

Automatic Switch Point Optimisation