> **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

# Miniature Reflective Infrared Optical Sensors - 5 Pack - ITR20001/T

**Type:** Product page · **SKU:** ADA3930 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/miniature-reflective-infrared-optical-sensors-5-pack-itr20001-t.html ([markdown](https://core-electronics.com.au/miniature-reflective-infrared-optical-sensors-5-pack-itr20001-t.html.md))

This Reflective IR Sensor is a simple plastic casing with two elements - an IR LED and an IR phototransistor. You can control the IR LED and turn it on to bounce...

## Pricing

- **Price:** $5.30 (inc GST) — $4.82 AUD, exc GST
- **Quantity discounts:** 10+ $4.67 (exc GST) · 50+ $4.58 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 2 today, and up to 500 more in 8–12 days.

## How to buy

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## Description

This **Reflective IR Sensor** is a simple plastic casing with two elements - an IR LED and an IR phototransistor. You can control the IR LED and turn it on to bounce IR off objects to determine their reflectivity. White & light colored stuff will bounce the light, so you can detect it. Black & dark colored stuff will absorb the IR light so that it isn't detected. Likewise, if something isn't in the way of the sensor, it won't trigger either.

These sensors are handy when you want to detect if something has passed by the sensor, or a very simple hand-detector. Also sometimes these are used as rotary encoder, if the encoder wheel has black and white stripes, the photo sensor is fast enough to tell you the RPM. Most common usage of these sensors is for line following robots, they're so small and easy to solder, you can pack them together very close.

This sensor is compact, breadboard friendly and easy to solder to. It even has handy markings on the plastic so you know which side is the LED and which side is the phototransistor output. Adafruit don't include any 470O -1KO resistors for the Infrared LED, or a 10KO for the output pullup. But you do get a pack of 5!

This works best when detecting a light-colored object approximately 5mm away - 2mm to 10mm worked fairly well but your results may vary with the LED brightness, object shininess, etc.

### Technical Details

- [Datasheet](https://core-electronics.com.au/attachments/localcontent/ITR20001-T_107237959dc.pdf)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/m/i/miniature-reflective-ir-optical-sensors-5pack-itr20001-t-1.jpg)