Hello, I get some problems to use T/R40-16P sensors.
This is composed of 1 transmitter and 1 receiver.
Did any one used this kind of sensor and say me if there is some specifications to use or show me a simple installation ?
thank you all 
From what I found these are just the transducers and you will need to build a circuit to send and receive the pulses these use. could you give more details on what you want to do and how you plan to use these parts in that process?