Ultra Sonic Sensors
Ultrasonic
sensors (also known as transducers when they both send and receive)
work on a principle similar to radar or sonar which evaluate attributes of a
target by interpreting the echoes from radio or sound waves respectively.
Ultrasonic sensors generate high frequency sound waves and evaluate the echo
which is received back by the sensor. The Sensors then calculates the time
interval between sending the signal and receiving the echo to determine the
distance to an object.
This
technology can be used for measuring the height of liquid in a tank.
Systems
typically use a transducer which generates sound waves in the ultrasonic range,
above 20KHz, by turning electrical energy into sound, then upon receiving the
echo turn the sound waves into electrical energy which can be measured and
displayed (via 3rd party display or one of our OPLC’s)
The
technology is limited by the shapes of surfaces and the density or consistency
of the material. For example foam on the
surface of a fluid in a tank could distort a reading.