URM12 Ultra Long Range Ultrasonic Distance Sensor (70~1500cm)

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-Read Measured Distance

This article provides a detailed guide on how to use Arduino and RS485 Shield to measure distance using the URM12 ultrasonic sensor. It includes hardware and software preparation, wiring diagrams, and sample code to perform accurate distance measurement.

2. Example Code for Arduino-Read Onboard Temperature Sensor

This article guides users through setting up an Arduino system to read onboard temperature sensors using an RS485 shield. It covers hardware and software preparation, offers a sample code, and explains the wiring diagram needed for successful implementation.

3. Example Code for Arduino-Modify Module Address

This article provides a detailed guide on modifying module addresses using Arduino, including hardware preparation, software setup, and sample code implementation for effective use with RS485 shield.

4. Example Code for Arduino-Modify Module Baud Rate

The article provides a comprehensive guide on modifying the baud rate for Arduino modules using RS485. It includes hardware requirements, software setup, and detailed sample code. Ideal for Arduino enthusiasts looking to enhance their projects with specific baud rate configurations.

Reference

This article provides comprehensive information on RS485 communication interface and Modbus-RTU protocol for sensors, including library installation in Arduino IDE, detailed register descriptions, and the principles behind ultrasonic sensor detection in various environments.

Parameter	Value
Operating Voltage	DC 9-24V
Rated Power	4.8W
Effective Detection Range	70 ~ 1500cm
Distance Resolution	1cm
Distance Accuracy	1%
Temperature Resolution	0.1℃
Temperature Accuracy	±1℃
Measuring Frequency	3Hz
Operating Temperature	-10℃～＋70℃
Operating Humidity Range	RH<75%
Acoustics Frequency	38~42KHz
Direction Angle	15°±2°(-6dB)
IP Grade	IP65
Communication Interface	RS485

No.	Wire Color	Function
1	Black (thick line)	Shielded cable
2	White	VCC
3	Black (thin line)	GND
4	Orange	RS485-A
5	Brown	RS485-B

URM12 Ultra Long Range Ultrasonic Distance Sensor (70~1500cm)

Specification

Pinout

Wiring Order

What is the detection range of the ultrasonic sensor?