uxcell 10 Pcs Piezo Discs 10mm Acoustic Pickup Transducer Element Trigger Buzzer CBG Guitar

The shipment arrived quickly.

This was a perfect replacement for a humidifier. Works great and exactly what I needed.

Works great. Used for my homebrew electric violin

At least 3 of them broke in the soldering process. There was too much noise in the signal and the cables kept breaking from the sensor.

Good element very sensitive all of them consistently worked well.

as described

I wasnt expecting these to be <.5" or so, never seen piezo elements this small... but it is a force sensor I guess but you can drive audio thru it as a tiny (feeble really) speaker if you wish... that is how I tested it ... just hooked it up to my function gen to produce tones. I should have read the print carefully I guess... they didnt seem that small in the picture but oh well.

These are good piezo discs and they worked well for what I needed. The price and quality are both great.