The Ultrasonic Level Transmitter is a non-contact, solid state device for the measurement of level, volume, proximity, or distance in corrosive material environments. The IRU operates by transmitting a series of ultrasonic sound waves in a cone shaped pattern. Sound waves reflect from the target being measured back to the sensor, which measures the time interval between transmitting and receiving the sound wave. Calculated by the speed of sound, the time interval is converted to a distance measurement.

The analog output can be configured normally or inversely proportional to distance from the target being measured. The IRU is available with a standard range of 1-10 feet, but is available for closer range applications upon request. Adjustments to zero and span allow for further customization of the measurable range for specific applications. These settings are achieved through the unit’s RS-232 interface, and reside in non-volatile, internal memory.