GENERAL DESCRIPTION
The LVUN-600 Series Liquid Level Detection system is an ideal, low cost ultrasonic liquid level detection system for many applications. It operates in a broad spec- trum of viscous to light liquids.
PRINCIPLES OF OPERATION
The LVUN-600 Series operates using ultrasonic sound wave propagation. Ultrasonic sound waves are greatly attenuated when transmitted through air. Conversely, when liquid is present, transmission of the sound waves is greatly enhanced. The electronic control unit, either integral or remote to the sensor, generates electrical signals that are converted to bursts of ultrasonic energy at the sensor. The ultra- sonic bursts are transmitted across the liquid sensing gap of the sensor. Upon receipt of a valid signal at the receiver, the solid state electronics generate a “data enable” condition indicating liquid is present. This signal energizes a relay and provides an output condition.
4For Ultrasonic Point Level Switches LVUN-600 Series
