This specification includes 40F16TR-A1 ultrasonic sensor size, characteristics, performance parameters and precautions, before using this product, please read this specification. 40F16TR-A1 has the functions of transmitter and receiver. It generally can be used for ultrasonic range finder, ultrasonic sensor for non-contact detect objects, ultrasonic distance sensor, ultrasonic automation control, ultrasonic liquid level sensor, etc. If you have any questions for other applications, please contact us for details.