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:
Working Temperature:-10℃~70℃
Storage Temperature:-20℃~80℃
Wiring:
+5V (power supply positive)
Trig (control) RX
respond (receive) TX
GND (power supply negative)
Ultrasonic Range Sensor Board: 6*3mm
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 respond 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;

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 respond signal once detect return signal. The pulse width of respond signal is proportional to the measured distance.Thus calculate the distance with interval between sending signal and receiving respond signal.

Formula:
uS/58= cm or uS/148= inches;
Or:
Distance = high level time * sound velocity(340m/S)/2;
Suggested test cycle is more than 60ms, in order to prevent effect of transmitting signal on respond signal.

Package Includes:
1 x Distance Measuring Module and Sensor