> **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 # HC-SR04 Ultrasonic Module Distance Measuring Sensor **Type:** Product page · **SKU:** CE05112 · **Brand:** [Core Electronics](https://core-electronics.com.au/brands/core-electronics-australia) **Page:** https://core-electronics.com.au/hc-sr04-ultrasonic-module-distance-measuring-sensor.html ([markdown](https://core-electronics.com.au/hc-sr04-ultrasonic-module-distance-measuring-sensor.html.md)) The HC-SR04 ultrasonic sensor uses sonar to determine distance to an object like bats or dolphins do. It offers excellent range accuracy and stable readings in an easy-to-use package. ## Pricing - **Price:** $1.95 (inc GST) — $1.77 AUD, exc GST - **Quantity discounts:** 5+ $1.74 (exc GST) · 15+ $1.68 (exc GST) ## Availability & dispatch - In stock, ships same business day if ordered before 2PM (Australia/Sydney). - We can dispatch 181 today; more stock is typically available with a 8–12 day lead time. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=CE05112:1` (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/CE05112:1.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 Get object/distance detection in your project using the low-cost HC-SR04 Ultrasonic Distance Module from Elegoo. Using the same principle as bats (Echo location), this module uses Trigger and Echo pin to send a signal and listen for it to be 'bounced back'. With a few lines of code you'll be detecting objects for your project. This module is the perfect option for detecting objects between 2cm-500cm in front of your project. - **Range** - This module can detect objects between 2cm and 500cm in front of itself with an angle of 15 degrees either side. - **Accuracy** - The readings of the module can be broken down into 0.3cm increments, which is plenty for most robotics projects - **Mounting** - Used by many makers, in many projects, the 4 holes on the circuit board make for easy mounting into your project - **Software** - As a favorite distance sensor, there are plenty of libraries and examples available to use with Arduino, Raspberry Pi and other maker platforms. - **Distance calculation** - Once it's wired up, you'll use the formula: distance = (traveltime/2) x speed of sound for a measurement in centimeters ### How to use this Ultrasonic Distance Sensor As this module is a 5V sensor, it will work great with Arduino and other 5V microcontrollers. You'll simply need to wire the device up to your board and configure the trigger and echo pins as Output/Input pins respectively. Once you've got it configured correctly, use your code to take the Input reading from the Echo pin and plug it into the distance formula: distance = (traveltime/2) x speed of sound to get a distance reading. It's really that easy. There's even a library for Arduino, NewPing, that makes the process even easier for you. We've written a pretty comprehensive guide on how you can use this module in your projects. It's guaranteed to get you up to speed as fast as possible. If you need a sensor that will work with 3.3V such as [Micro:bit](https://core-electronics.com.au/micro-bit-v2-australia.html) or [Raspberry Pi Pico](https://core-electronics.com.au/raspberry-pi/pico/official-boards.html) then check out [this](https://core-electronics.com.au/33v-ultrasonic-distance-sensor.html)! [Our guide on using Ultrasonic Distance Modules with Arduino](https://core-electronics.com.au/tutorials/how-to-use-ultrasonic-sensors.html) [Our guide on Sensors and how to use them](https://core-electronics.com.au/tutorials/getting-hands-on-with-sensors.html) ### Technical Specifications - Power Supply :+5V DC - Quiescent Current : <2mA - Working Current: 15mA - Effectual Angle: <15° - Ranging Distance : 2cm – 400 cm/1″ – 13ft - Resolution : 0.3 cm - Measuring Angle: 30 degree - Trigger Input Pulse width: 10uS - Dimension: 45mm x 20mm x 15mm [Technical Datasheet for the HC-SR04 Ultrasonice Distance Sensor](https://core-electronics.com.au/attachments/localcontent/HCSR04_80625a9081e.pdf) ## Guides for this product - [Effective Ways To Measure Distance In Maker Projects](https://core-electronics.com.au/guides/sensors/effective-ways-to-measure-distance-in-maker-projects/) - [Ultrasonic Sensing with Pycom](https://core-electronics.com.au/guides/pycom/hc-sr04-ultrasonic-sensor-with-pycom-tutorial/) ## Videos for this product - [Effective Ways To Measure Distance In Your Maker Projects!](https://core-electronics.com.au/videos/effective-ways-to-measure-distance-in-your-maker-projects) ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/d/e/device6_1000.jpg)