> **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

# Gravity: Digital Adjustable Infrared Proximity Sensor

**Type:** Product page · **SKU:** SEN0019 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/adjustable-infrared-sensor-switch.html ([markdown](https://core-electronics.com.au/adjustable-infrared-sensor-switch.html.md))

This is an infrared distance switch. It has an adjustable detection range, 3cm - 80cm. It is small, easy to use/assemble, and inexpensive. Useful for robotics, interactive media, industrial assembly line, etc.

## Pricing

- **Price:** $11.70 (inc GST) — $10.64 AUD, exc GST
- **Quantity discounts:** 6+ $10.11 (exc GST) · 12+ $9.68 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 2 today, and up to 350 more in 8–12 days.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=SEN0019:1` (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/SEN0019:1.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

This is an [Arduino](https://core-electronics.com.au/arduino.html) infrared [distance sensor](https://www.dfrobot.com/category-55.html). It has an adjustable detection range, 3cm - 80cm. It is small, easy to use, assemble, and inexpensive.

Useful for [robotics](https://www.dfrobot.com/category-37.html), interactive media, industrial assembly line,etc. Infrared wave length is part of the Sun's natural light spectrum. While is a nice fit for indoor projects, outdoors with plenty of sun light and reflective surfaces on it's sight is not adviced. It's incredibly repurposable and canbe used for a lot of different projects. The adjustable screw on it's back makes it very convenient for different purposes. After digital read shows on your [Arduino](https://core-electronics.com.au/arduino.html) pin andthen you are ready to go. It is a great sensor choice for quick[ prototyping](https://core-electronics.com.au/prototyping.html).

Use it on a [robot](https://www.dfrobot.com/category-37.html) for wall detection and wall follower, or as some of the [projects](https://www.dfrobot.com/category-projects.html) listed below as atrigger system. It's round shape with the screwable holders make it a good choice for a home made assembled robot, with a hole of it's diameter and the holders you can place it aiming at different positions on a robot. Or even place it nearyour PC to turn on and off your monitor.

To ease the difficulty, a [Gravity ](https://core-electronics.com.au/gravity)Interface is adapted to allow plug&play. The [IO expansionshield](https://www.dfrobot.com/product-1009.html) is the best match for this [sound senor](https://www.dfrobot.com/category-63.html) connecting to your [Arduino](https://core-electronics.com.au/arduino.html).

### Specification

- Power supply: 5V
- Current: 100mA
- Range: 3 - 80cm adjustable
- Brown: +5V; Black: Signal; Blue: GND
- Dimension: 45 x 18 x 18 mm (1.8 x 0.7 x0.7 in)

### Documents

- [Wiki (Adjustable Infrared Sensor Switch (SKU:SEN0019))](https://www.dfrobot.com/wiki/index.php/Adjustable_Infrared_Sensor_Switch_(SKU:SEN0019))
- [Dimension](https://core-electronics.com.au/attachments/localcontent/AdjustableInfraRedSEN00190_15368ae888a.png)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/s/e/sen0019.jpg)