DFRobot URM15 – 75KHZ Ultrasonic Sensor (30~500cm, RS485)


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Approx Restocking Date: 25 to 30 Days
SKU: 1397844
  1. Operating Voltage: 5-12V DC
  2. Max Instantaneous Current: 350mA
  3. Effective Measuring Range: 30cm – 500cm
  4. Distance Resolution: 10mm
  5. Distance Error: ±1%
  6. Temperature Resolution: 0.1℃


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Brand: DF Robot
Category: Ultrasonic Sensors and Modules

DFRobot URM15 is an ultrasonic ranging sensor with an IP65 waterproof probe that offers an effective measuring range of 30cm-500cm (test on flat wall). It uses the RS485 interface that follows the standard Modbus-RTU protocol for reliable data communication. The sensor supports revisable slave addresses and serial parameters, which can be conveniently used with all kinds of industrial controlling machines.

In addition, the URM15 comes with a temperature compensation function. Users can select external or onboard temperature compensation to reduce the impact of ambient temperature on the measurement. The sensor adopts 75KHz ultrasonic transducer with diameter of 40mm, so it features a relatively small measuring angle and high sensitivity.


  1. Industrial controlling machines


  1. IP65 grade protection
  2. RS485 communication interface based on standard Modbus RTU protocol
  3. High sensitivity & small measuring angle

Packages Includes:

1 x DFRobot URM15 – 75KHZ Ultrasonic Sensor (30~500cm, RS485)

SKU: 1397844 Category:
Operating Voltage

5-12V DC

Max Instantaneous Current


Effective Measuring Range

30cm – 500cm

Distance Resolution


Distance Error


Temperature Resolution


Temperature Error


Measuring Frequency

10 Hz

Operating Temperature

-10℃ to+70℃

Operating Humidity Range


Sensor Acoustic Frequency


Directional Angle




Shipping Weight 0.254 kg
Shipping Dimensions 20 × 14 × 5 cm
3 Months Warranty

This item is covered with a standard supplier warranty of 3 months from the time of delivery against manufacturing defects only. This is a quality product & only manufacturing defects are covered under this warranty. Reimbursement or replacement will be done against manufacturing defects.

What voids warranty:

If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.

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Country Of Origin: China