Ultrasonic proximity switch applies ultrasonic sensor of transceiver type, from which ultrasonic wave is remitted and spread through air in certain direction, and some of the wave be reflected by water and be received by the sensor. Then the built-in microprocessor can calculate the time “t” between transmitting and receiving, as a result, the height “L” between water level and the proximity switch can be counted together with the spread speed “V” of ultrasonic wave.
Shape : rectangular
Measuring range : Min.:
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