HALJIA HC-SR04 Ultrasonic Sensor Distance Measuring Module Compatible with Arduino

• Using IO trigger for at least 10us high level signal.
• Module can send 8 pro 40 kz square wave automatically, and will test if there is any signal returned.
• If there is signals returning, through outputting high level and the time of high level continuing is the time of that from the ultrasonic transmitting to receiving. Test distance = (high level time * sound velocity (340M/S) / 2
• Working Voltage : 5V(DC); Static current: < 2mA; Sensor angle: <15°; Detection distance: 2cm-450cm; High precision: Up to 0.3cm

Specifications: This performance of the sonic sensor distance measuring module is stable, measure the distance accurately. The module is with high precision, blind spots (3cm) super close. This module provides a full set of ranging process. Model: HC-SR04. Color: blue and silver. Operating voltage: 5V DC. Static current: less than 2 mA. Output signal: Electric frequency signal, high level 5V, low level 0V. Sensor angle: Not more than 15 degrees. Detection distance: 2 cm ~ 450 cm. High precision: up to 3 mm. Mode of connection: VCC / Trig (T) / Echo (R) / GND. Working principle of the module: Adopt IO trigger through supplying at least 10us sequence of high level signal. The module automatically send eight 40khz square wave and automatically detect whether receive the returning pulse signal. If there is signals returning, through outputting high level and the time of high level continuing is the time of that from the ultrasonic transmitting to receiving. Package Included: 1 x ultrasonic sensor module.