© IS Technologies Co., Ltd. PAGE 10 / 41
1. Principle of operation
The sensor transmits ultrasonic pulses to the measurement target. The pulses
are reected from the surface of the target and received back by the sensor.
The running time is converted into the distance and it ows as level or
volume on the display.
=D(C•T)/2
D: DISTANCE
C: SOUND VELOCITY
T: TIME OF FLIGHT
•
Distance: from the sensor bottom to surface of the target
•
Level: from the bottom of storage to surface of the target
•
Empty: from the sensor bottom to the bottom of storage
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