DFRobot
URM07-UART Low-Power Consumption Ultrasonic Sensor (20~750cm)
The URM07 is an ultra-low-power UART ultrasonic distance sensor with an effective range of 20–750 cm. Operating on 3.0–5.5 V, it is directly compatible with ...
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The URM07 is an ultra-low-power UART ultrasonic distance sensor with an effective range of 20–750 cm. Operating on 3.0–5.5 V, it is directly compatible with 3.3 V and 5 V microcontrollers including Arduino and Raspberry Pi. With an average operating current of just 5 mA and standby current under 14 µA, it is well suited for battery-powered and remote sensing applications.
A built-in temperature sensor provides automatic temperature compensation for improved distance accuracy. The integrated ultrasonic probe offers an approximately 60° detection angle in a compact 27 × 27 mm package, communicating via UART over a 2.54 mm 4-pin interface.
Key Features
- Ultra-Low Power – Average 5 mA operating, <14 µA standby
- Wide Range – 20–750 cm effective detection distance
- Built-In Temperature Compensation – On-board sensor corrects for ambient temperature
- Wide Voltage Range – 3.0–5.5 V DC, compatible with 3.3 V and 5 V systems
- UART Interface – 2.54 mm 4-pin connector
- Protection – Reverse polarity and overvoltage protection
- Compact – Integrated probe design, 27 × 27 mm
Specifications
- Operating Voltage – 3.0–5.5 V DC
- Effective Range – 20–750 cm
- Detection Angle – ~60°
- Distance Resolution – 1 cm
- Distance Error – 1%
- Average Current – <5 mA (continuous measurement)
- Peak Current – <9 mA
- Standby Current – <14 µA
- Acoustic Frequency – 38–42 kHz
- Boot Time – <20 ms
- Measurement Period – <60 ms
- Temperature Error – ±1 °C
- Operating Temperature – −10 °C to +70 °C
- Operating Humidity – <75% RH
- I/O Mode – Open drain with integrated pull-up resistor
- Dimensions – 27 × 27 mm
- Weight – ~4.2 g
Ideal For
- Battery-powered distance sensing
- Robotics obstacle avoidance
- Level measurement and proximity detection
- IoT and remote monitoring projects
Package Contents
- 1× URM07 UART Ultrasonic Sensor (20–750 cm)
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
- IoT
- Short for Internet of Things, meaning physical devices that connect to networks or the internet to send data or be controlled remotely. It matters if you want projects such as connected sensors, remote controls or classroom data-logging activities.
- Temperature compensation
- Temperature compensation is when a sensor or instrument adjusts its readings to reduce errors caused by changes in temperature. This matters because a sensor's raw output often drifts as conditions warm or cool, so compensation keeps readings more consistent and accurate over time.
- UART
- UART is a simple asynchronous serial interface that sends data over separate transmit and receive wires, usually labelled TX and RX, with both ends set to the same baud rate. It is a common way for microcontrollers and other serial devices to exchange data.
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