B E – Ultrasonic Module HC-SR04 Distance Sensor For Arduino, Pack of 10 – STSX0621

Ultrasonic Module HC-SR04 Distance Measuring Ranging Sensor for Arduino. This module has stable performance and accurate measurement distance. 0.78~196 in/ (2cm~500cm); High precision: up to 0.12 in/(0.3 cm). Detection angle <15 °. HC-SR04 for Arduino ultrasonic sensor can send eight 40 kHz and detect whether there is any pulse signal back. If it back, a high level signal will be outputed by IO, and the duration of the signal is the time from sending ultrasonic to returning.