> **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

# URM09 Ultrasonic Sensor (Gravity I²C)

**Type:** Product page · **SKU:** SEN0304 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/urm09-ultrasonic-sensor-gravity-i-c.html ([markdown](https://core-electronics.com.au/urm09-ultrasonic-sensor-gravity-i-c.html.md))

DFRobot URM09 is an ultrasonic sensor specifically designed for fast ranging and obstacle avoidance application. Its measuring frequency can reach up to 50Hz. The...

## Pricing

- **Price:** $21.70 (inc GST) — $19.73 AUD, exc GST
- **Quantity discounts:** 6+ $18.75 (exc GST) · 12+ $17.95 (exc GST)

## Availability & dispatch

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

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=SEN0304:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart.
- **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/SEN0304:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.)
- **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there.
- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

DFRobot URM09 is an ultrasonic sensor specifically designed for fast ranging and obstacle avoidance application. Its measuring frequency can reach up to 50Hz. The sensor adopts built-in temperature compensation and I2C communication. There are three measurement ranges designed for programs to select: 150cm, 300cm and 500cm. Please note that shorter range will provide shorter ranging cycle and lower sensitivity. You may need to set it according to your actual use. Besides, the sensor is equipped with on-board LDO, which is able to avoid performance attenuation within power supply range.

### Specification

- Supply Voltage: 3.3~5.5V DC
- Operating Current: 20mA
- Operating Temperature Range: -10°C ~ +70°C
- Measurement Range: 2cm~500cm (can be set)
- Resolution: 1cm
- Accuracy: 1%
- Frequency: 50Hz Max
- Dimension: 47mm × 22 mm/1.85”× 0.87”
 
### Documents

5. Product wiki
### Parts List

- URM09 Ultrasonic Sensor(Gravity I²C)(V1.0) x1
- PH2.0-4P Connector x1

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/s/e/sen0304-900x600.jpg)