Part Number: SMATR18H40XLK3Our Piezo Air Transducer is Water proof and it is Transmitter/Receiver on the same unit. Housing Material: AluminumDimensions: 18mm Diameter x 9 mm HeightNominal frequency fr: 40 KHzWires/Connections: 28mm WiresSensitivity: =150mV (1*)Directivity: X:120±10° Y:50±10°° (2*)Capacitance: 1800pF±10% Pf (3*)Max. Input Voltage: =140Vp-pTest Condition: 25±3 °C 40~70% R.H.Applications, among others, are: Distance Meter, Distance Sensor, Sound Detector, Robot Navigation, Send/Receive dataNotes: Echo Sensitivity =150mV, Decay Time =1.4ms1* => Sensitivity: 1V/ſbar2* => Directivity is a typical value. It can be changed by operating circuit and fixing method of the transducer.3* => at 1KHz
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