1. This module performance is stable, measure the distance accurately. It can compare with the abroad ultrasonic measuring module SRF05, SRF02, etc. the module is high precision and nearly blind alleys (2cm), this product successful to the market, because of its stable measuring.

2. Main technical parameters:

       1. Working Voltage : DC 5V.

       2. Static current: Less than 2mA.

       3. level output: more than 5V

       4. level input: less than 0V

       5. Sensor angle: Not more than 15 degrees.

       6. Detection distance: 2cm-450cm.

       7. High precision: better than 2mm.

Mode of connection: VCC?trig(T)?echo(R)?GND

   3.Working Principle:

  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. Test distance = (high level time * sound velocity (340M/S) / 2.  

This module provides a full range of ranging process: C51, PIC18F877 ultrasonic LCD1602 displays, ultrasonic LCD12864 display, digital display, serial display, ranging reference program.