Detailed Product Description Ultrasonic piezoelectric transducer,transducer,waterproof ultrasonic sensorUltrasonic transducer - E16401 Features of ultrasonic tranducer E16401:Functions: combined use type (transmitter and receiver ... reliability,less power consumption and waterproof.Technical Specifications:Φ16mm, waterproof ultrasonic transducer; Waterproof level: IP68; Nominal frequency: 40±0.5 kHz ...