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How to choice ultrasonic device?

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ltg

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Hi,

I will use ultrasonic sensors to design a range finder. I search on Google there are a lot of projects made by ultrasonic transmitter and receiver. But there are ultrasonic transceiver to use, these transceiver are used "only" in car application. In my application should I use transeiver or separete ultrasonic transmitter and reciever? Do they have same performance? If I choice transceiver do I need a tx/rx swith to my drive cicuirt? Thanks very much!

Best Regards,
ltg
 

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