Ultrasonic Sensor Module HC-SR04 Distance Measuring Sensor For Arduino 1PCS/5PCS

Feature: This module performance is stable, measure the distance accurately. Performance nearly the same as SRF05, SRF02 SRF05, SRF02 ultrasonic distance measuring module and other comparable. Module High precision, blind spots (2cm) super close.Detection distance: 2cm-450cmWiring: VCC, trig (control side), echo (receiving end), GNDVoltage: DC 5VMain technical parameters:Voltage: DC 5VStatic current: less than 2mAElectrical level output: 5V highElectrical level output: at the end of 0VInduction angle: not more than 15 degreesDetection distance: 2cm-450cmHigh precision: 2mmWiring: VCC, trig (control side), echo (receiving end), GNDModule works:using IO trigger distance, the high signal to at least 10usmodule automatically sends eight 40khz square wave, automatically detects whether a signal return;a signal back, through the IO output a high electrical level, high electrical level duration is: the ultrasound time from launch to return. Test distance = (time of the high electrical level * speed of sound (340M / S)) / 2;