Product Name: 40kHz Waterproof Ultrasonic Sensor Module for Car Parking Model NO.: KT40-M087 Material: Mixture Brand: Kangtong Output: Analog Sensor Production Process: Integration RoHS: RoHS Trademark: Kangtong Transport Package: Box Specification: customized Origin: China, Shenzhen Product Description 1.Technical parameterNO.ItemParameter1Working voltage5V2Static working current<25mA3Detection angle70°±15°4Detection range2-200cm5Detection accuracy1cm6Blind area2cm7Response cycle70mx8Waterproof and dust proofYES9Working temperature-10ºC~+60ºC4.Interface definition NO.InterfaceDescription1VccPower supply 2TrigGPIO mode is Trig,triggering signals3EchoGPIO mode is Echo,feedback signals4GndGround5.Working principle 1) IO triggers ranging by outputting a more than 10us high-level signal;2) The module automatically sends 8 square waves of 40KHz ,and detects whether there is signal return;3) IO outputs a high level when there is a signal return, and the duration of high level is the time for the ultrasonic wave from transmitting to returning.4) Detection distance = high level time * sound speed (340m / s) /2