DFRobot
URM15 - 75KHZ Ultrasonic Sensor (30~500cm, RS485)
The DFRobot URM15 is an industrial-grade ultrasonic ranging sensor with an IP65-rated waterproof probe. It provides an effective measuring range of 30–500 cm...
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The DFRobot URM15 is an industrial-grade ultrasonic ranging sensor with an IP65-rated waterproof probe. It provides an effective measuring range of 30–500 cm (tested against a flat wall) and communicates via an RS485 interface using the standard Modbus RTU protocol, making it compatible with PLCs and other industrial controllers.
The sensor features a 75 kHz ultrasonic transducer with a 40 mm diameter, delivering a relatively narrow beam angle (20° ±2°) and high sensitivity. Built-in temperature compensation — selectable between onboard and external sources — helps reduce the impact of ambient temperature variations on measurement accuracy.
Key Features
- IP65 Waterproof Probe – Suitable for outdoor and harsh-environment installations
- RS485 / Modbus RTU – Standard industrial communication protocol
- Configurable Address & Serial Parameters – Supports multiple sensors on a single bus
- Temperature Compensation – Onboard or external, for improved accuracy across temperature ranges
- Narrow Beam Angle – 20° ±2° (−6 dB) for focused detection
Specifications
- Operating Voltage – 5–12 V DC
- Max Instantaneous Current – 350 mA
- Effective Measuring Range – 30–500 cm
- Distance Resolution – 10 mm
- Distance Error – ±1%
- Temperature Resolution – 0.1 °C
- Temperature Error – ±1 °C
- Measuring Frequency – 10 Hz
- Operating Temperature – −10 °C to +70 °C
- Operating Humidity – RH <75%
- Acoustic Frequency – 75 kHz ±2%
- Directional Angle – 20° ±2° (−6 dB)
- Communication – RS485 (Modbus RTU)
Resources
Package Contents
- 1× URM15 75 kHz Ultrasonic Sensor
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.
- Modbus
- Modbus is an industrial communication protocol used by many meters, sensors, PLCs and automation devices. When a product lists Modbus support, it is generally easier to integrate with existing industrial equipment that speaks the same protocol.
- Modbus RTU
- Modbus RTU is a version of the Modbus protocol that runs over serial wiring, commonly RS485. When a product lists Modbus RTU, it can connect to industrial sensors, meters or drives that use serial Modbus rather than Ethernet.
- RS485
- RS485 is a robust differential serial communication standard often used in factories, farms and buildings where cables may be long or electrically noisy, and it can link many devices on a single pair of wires. When a product lists RS485, it can communicate with industrial sensors, meters and control equipment over longer distances than typical hobby serial wiring.
- 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.
Find this product in
Brands
Supplier page — dfrobot.com
Supplier Description · 557.7 KB · Click any page to view full size
SEN0519 ultrasonic ranging sensor ce 1.0
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SEN0519 ultrasonic ranging sensor rohs 1.0
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Resources & Downloads
Guides, code examples, and more
Related Tutorials
Free guides on learn.littlebird.com.au
