> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# URM15 - 75KHZ Ultrasonic Sensor (30~500cm, RS485)

**Type:** Product page · **SKU:** SEN0519 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/urm15-75khz-ultrasonic-sensor-30500cm-rs485.html ([markdown](https://core-electronics.com.au/urm15-75khz-ultrasonic-sensor-30500cm-rs485.html.md))

DFRobot URM15 is an ultrasonic ranging sensor with IP65 waterproof probe that offers 30cm-500cm measuring range. It uses the RS485 interface that follows...

## Pricing

- **Price:** $169.95 (inc GST) — $154.50 AUD, exc GST
- **Quantity discounts:** 6+ $146.77 (exc GST) · 12+ $140.59 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Sep 01 and Sep 07.

## How to buy

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## Description

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.

**![URM15 - 75KHZ Ultrasonic Sensor](https://core-electronics.com.au/attachments/localcontent/1_245397f72c1.jpg)**

### Features

 IP65 grade protectionRS485 communication interface based on standard Modbus RTU protocolHigh sensitivity & small measuring angle ### Applications

 Industrial controlling machines ### Specification

 Operating Voltage: 5-12V DCMax Instantaneous Current: 350mAEffective Measuring Range: 30cm - 500cmDistance Resolution: 10mmDistance Error: ±1%Temperature Resolution: 0.1°CTemperature Error: ±1°CMeasuring Frequency: 10 HzOperating Temperature: -10°C to +70°COperating Humidity Range: RH<75%Sensor Acoustic Frequency: 75KHz±2%Directional Angle: 20±2°(-6dB)Communication: RS485(Modbus-RTU) ### Documents

 [Product wiki](https://wiki.dfrobot.com/SKU_SEN0519_URM15_RS485_Ultrasonic_Sensor)### Parts List

 URM15 75KHZ Ultrasonic Sensor x1

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/S/E/SEN0519-1.jpg)