Electronics > Beginners
Ultrasonic transducers.
(1/3) > >>
CJay:
Not so much a beginner's question but one from way back in the mists...

I seem to remember reading that although ultrasonic transducer pairs were marked T and R that they are exactly the same thing?

Am I right or is my mind playing tricks on me?
Benta:
Not sure about the T and R, but I do remember that they were matched and sold in pairs.
McBryce:
I think there are/were very minor differences between the physical and electrical properties of the T and R devices that were sold in pairs, but that they were essentially the same device. Probably sold in pairs because they were tuned to the same centre frequency. I know that modern automobile parkaid systems only use one device to transmit and recieve the signal, so the T and R devices must have been extremely similar.

McBryce.
Gyro:
As the T/R indication is usually either a stick-on label or ink stamp, I suspect it's more of a 'selection' process. Maybe they keep the lower impedance ones for TX. The internal construction looks identical, same little metal cone. They both seem to work ok in bat detectors.
CJay:

--- Quote from: Gyro on June 05, 2018, 02:35:37 pm ---As the T/R indication is usually either a stick-on label or ink stamp, I suspect it's more of a 'selection' process. Maybe they keep the lower impedance ones for TX. The internal construction looks identical, same little metal cone. They both seem to work ok in bat detectors.

--- End quote ---

Exactly the application I have in mind, thanks. I've ordered a couple of pairs of 40KHz ones.
Navigation
Message Index
Next page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod