300 KHz Air Transducer. Waterproof and it is Transmitter/Receiver on the same unit.
Housing Material: AluminumDimensions: 13mm X 9mmNominal frequency fr: 300kHz ± 2%Wires/Connections: 10.5mm, 7.5mm contact PinsSensitivity: -74dB min (0dB=100Vp-p,Term:10,Range:10cm)Transmitting Beam Angle（-6dB): 8°Detecting Range: 0.1m ~ 0.8mCapacitance: 265pF±20% Max. Input Voltage: =100 Vp-pProtection Class: IP65Working Temperature: -30～80℃Test Condition: 22±3 °C 40~70% R.H.Applications, among others, are: Distance Meter, Distance Sensor, Sound Detector, Robot Navigation and Anemometers.Notes: Minimum sensor range: 10cm. Maximum sensor range: 0.8m (Pulse-Echo Mode). Actual range may vary, depending on drive Circuitry and signal processing.