Gravity: URM09 Ultrasonic Ranging Sensor

Q: Many ultrasonic sensors on the platform, how to choose?

It is recommended to refer to this <a target="_blank" rel="noopener noreferrer" href="https://www.dfrobot.com/blog-1491.html">selection guide</a>.

Q: <h3>What is the detection range of the ultrasonic sensor?</h3>

The detection range of an ultrasonic sensor depends on the wavelength and frequency it uses. The longer the wavelength and the smaller the frequency, the greater the detection distance. The following is the detection range of several popular products on our platform for your reference.<figure class="image"><img src="https://dfimg.dfrobot.com/62469707aa9508d63a41ca96/makelog/266dead0757a3d416694f553fe5c720d_0x0.png.webp"></figure>

1. Example Code for Arduino-Ultrasonic Distance Measurement

This example is the ultrasonic distance measurement of the module. The mainboard outputs a high-level about tens of microseconds to trigger the sensor to start ranging. Then, the sensor will output a high-level pulse proportional to the ultrasonic flight time. The distance can be easily obtained after a simple calculation by detecting high-level time.

2. Example Code for micro:bit-Ultrasonic Distance Measurement

Use micro:bit and MakeCode to realize ultrasonic distance measurement with URM09 Ultrasonic Sensor(Gravity Trig).

Reference

Parameter	Value
Operating Voltage	3.3~5.5V DC
Max Instantaneous Working Current	<20mA
Operating Temperature Range	-10℃～＋70℃
Effective Ranging Range	2cm～500cm
Resolution	1cm
Accuracy	1%
Acoustic Frequency	40±2KHz
Ranging Frequency	25Hz Max
Dimension	47×22mm/1.85×0.87”

Num	Label	Description
1	-	Ground
2	+	Power Input(3.3V-5.5V)
3	D	Digital IO(TRIG/ECHO multiplexing, internally pulled-down)

Gravity: URM09 Ultrasonic Ranging Sensor

Specification

Measuring Angle

Pinout

What is the detection range of the ultrasonic sensor?