https://fbelec.en.made-in-china.com/product/twzEmAqUVfcB/China-200kHz-Reliable-Ceramic-Ultrasonic-Transducer-for-Gas-Flow-Meter.html
200kHz Reliable Ceramic Ultrasonic Transducer for Gas Flow Meter - Piezo Ring and Piezo Ceramic Ring
200kHz Reliable Ceramic Ultrasonic Transducer for Gas Flow Meter, Find Details and Price about Piezo Ring Piezo Ceramic Ring from 200kHz Reliable Ceramic...
gas flow meterultrasonic transducer
https://www.garmin.com/es-ES/p/674/
200KHz, 12deg, bronze, thru-hull mount, depth, temp
thru hullbronzemountdepthtemp