Features Easy to use: DC 5v waterproof ultrasonic distance sensor is small in size, easy to use, and can accurately measure distance. Use IO port TRIG to trigger distance measurement, the high level signal is at least 10uS Low power consumption: Ranging module wave distance measuring board has low voltage, low power consumption and stable performance. The module automatically sends 8 40kHz square waves and automatically detects whether there is a return signal Strong anti-interference ability: The ranging module wave distance measuring board has high measurement accuracy and strong anti-interference ability. Wave emission frequency is 40kHz, the maximum measurement distance is 5m, and the blind area is 25cm Waterproof sensor: 5v ultrasonic distance detector is equipped with an integrated wire-sealed waterproof sensor, which is suitable for wet and harsh measurement occasions Application: Ultrasonic wave distance measuring board can be widely used in horizontal distance measurement, obstacle avoidance, automatic control, security, industrial control, etc. Specifications: Working Voltage DC5V Quiescent Working Current 5mA Total Working Current 30mA Wave Transmit Frequency 40kHz Max. Measuring Distance 5m Blind Zone 25cm Size 28.5*41mm Resolution Approx 0.5cm Angle <50 degree Working Temperature -10℃~70℃ Storage Temperature -20℃~80℃ Wiring: +5V (power supply positive) Trig (control) RX Echo (receive) TX GND (power supply negative) Basic Working Principle: (1) Using IO port TRIG trigger measuring distance, high level signal for at least 10uS. (2) Module automatically sends eight 40kHz square wave, automatically detects whether there is return signal. (3) When there is return signal, through IO port ECHO output a high level, the duration of the high level is the time of ultrasonic wave from sending to returning.Test distance = (high level time * sound velocity (340m/S))/2;     This module is simple to use, a port sends a high level of more than 10uS, then wait for high level output at receive port. Timer was enabled once there is output, and read time when this port becomes low level, which is the time of this measurement. Use the time to calculate distance. Constantly cycle measurement can reach your mobile measuring values.     The ultrasonic timing diagram shows that you only need to provide a more than 10uS pulse trigger signal, the module inside will send eight 40kHz cycle level and detect return wave. Output echo signal once detect return signal. The pulse width of echo signal is proportional to the measured distance. Package Includes: 1 x Distance Measuring Module and Sensor Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List