> **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

# Large Ultrasonic (Sonar) Sensor with Horn and UART Output

**Type:** Product page · **SKU:** ADA4664 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/large-ultrasonic-sonar-sensor-with-horn-and-uart-output.html ([markdown](https://core-electronics.com.au/large-ultrasonic-sonar-sensor-with-horn-and-uart-output.html.md))

This impressive looking horn is actually an ultrasonic sensor, ready for panel mount use. Inside is a module that uses high frequency signals to determine distance to a surface, and the horn helps guide the waveform so it can reach farther without spreading too wide. It's elegant looking and is more durable than the 'raw' ultrasonics Adafruit sell a lot of, so it would do well in a garage, robot or installation where you want a durable dust and weather-resistant design

## Pricing

- **Price:** $52.40 (inc GST) — $47.64 AUD, exc GST
- **Quantity discounts:** 10+ $46.21 (exc GST) · 50+ $45.25 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 2 today; more stock is typically available with a 8–12 day lead time.

## How to buy

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## Description

This impressive looking horn is actually an ultrasonic sensor, ready for panel mount use. Inside is a module that uses high frequency signals to determine distance to a surface, and the horn helps guide the waveform so it can reach farther without spreading too wide. It's elegant looking and is more durable than the 'raw' ultrasonics Adafruit sell a lot of, so it would do well in a garage, robot or installation where you want a durable dust and weather-resistant design. It has a range of 28 cm to 750 cm with a read resolution of 1mm (precision isn't specified, but its probably about 5-10 mm). As you get to the longer distances, its important to take into account the spread of the cone, which is about 40 degrees. Adafruit weren't able to get a reading of 750cm, but Adafruit did reach 600 cm (in Adafruit's small apartment).

This sensor has UART output, so it can connect to a microcontroller or microcomputer with a TTL serial port. You can also connect it to a computer [using a USB-to-serial adapter](https://core-electronics.com.au/usb-to-ttl-serial-cable-debug-console-cable-for-raspberry-pi.html) and read data from the operating system's COM or serial port device.

It comes with a 2mm pitch connector you can cut off or re-purpose. To use, simply connect the red wire #1 to 3 or 5V, black wire #2 to ground, skip #3 and connect #4 to your serial input pin and read the data in at 9600 baud. A blue LED on the back will blink with each reading. [Check out the Arduino and Python example code to get readings in a jiffy!](https://github.com/adafruit/Adafruit_Learning_System_Guides/tree/master/DYP_ultrasonics)

This sensor has a 'blind' zone distance of 0 to 28 cm, that means *it can't accurately tell when something is less than that distance away*. it's best used when you know that the object you're sensing is at least 30 cm from the sensor!

[We carry a large variety of distance sensors here if this fellow isn't what you're looking for.](https://core-electronics.com.au/search/?q=distance+sensors)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/4/6/4664-03.jpg)