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By certification 
This specification includes 40B14TR-3 ultrasonic sensor size, characteristics, performance parameters and precautions, before using this product, please read this specification. 40B14TR-3 has the functions of transmitter and receiver. It generally can be used for ultrasonic parking sensor, ultrasonic sensor for non-contact detect objects, ultrasonic automation control, etc. If you have any questions for other applications, please contact us for details.
