# QTRX-HD-06RC Reflectance Sensor Array: 6-Channel, 4mm Pitch, RC Output, Low Current

**Type:** Product page · **SKU:** POLOLU-4306 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia)
**Page:** https://core-electronics.com.au/qtrx-hd-06rc-reflectance-sensor-array-6-channel-4mm-pitch-rc-output-low-current.html ([markdown](https://core-electronics.com.au/qtrx-hd-06rc-reflectance-sensor-array-6-channel-4mm-pitch-rc-output-low-current.html.md))

This array of IR LED/phototransistor pairs is great for precisely identifying changes in reflectance (like line detection). It operates from 2.9 V to...

## Pricing

- **Price:** $20.95 (inc GST) — $19.05 AUD, exc GST
- **Quantity discounts:** 10+ $18.28 (exc GST) · 25+ $17.71 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 31 and Sep 02.

## Description

This reflectance sensor feature a linear array of infrared emitter/phototransistor pair modules in a high-density (4 mm pitch) arrangement, which makes it well suited for applications that require detection of changes in reflectivity. This change in reflectivity can be due to a color change at a fixed distance, such as when sensing a black line on a white background, as well as due to a change in the distance to or presence of an object in front of the sensor.

### **Specifications**

- Dimensions: 25.0 × 20.0 × 3.0 mm (see the [dimension diagram](https://core-electronics.com.au/attachments/localcontent/qtr-qtrx-dimensions_11729b1aebc.pdf) (1MB pdf) for more details)
- Operating voltage: 2.9 V to 5.5 V
- Sensor type: QTRX
- Sensor count: 6
- Sensor pitch: 4 mm
- Full-brightness LED current: 3.5 mA (independent of supply voltage)
- Max board current: 14 mA
- Output format: digital I/O-compatible signals that can be read in parallel as timed high pulses
- Optimal sensing distance: 10 mm
- Maximum recommended sensing distance: 40 mm
- Weight: 1.5 g
 
### **Dimensions**

 | Size: | 25.0 × 20.0 × 3.0 mm |
|---|---|
| Weight: | 1.5 g |

**Identifying markings**

 | PCB dev codes: | irs26j[1](https://core-electronics.com.au/#note1) |
|---|---|
| Other PCB markings: | 0J11382[1](https://core-electronics.com.au/#note1) |

### **Notes:**

 1 Note: this does not differentiate between the A and RC output types. ### **Documents**

- **Pololu QTR Reflectance Sensor Application Note ([Printable PDF](https://core-electronics.com.au/attachments/localcontent/QTR_application_note_8746975ebf4.pdf))**
- Information about using the Pololu QTR reflectance sensors, including differences between A-type and RC-type sensors and sampleoscilloscope screen captures of sensor outputs.
- **[Schematic diagrams of the QTR/QTRX-HD Reflectance Sensor Arrays](https://core-electronics.com.au/attachments/localcontent/qtr-qtrx-hd-reflectance-sensor-array-schematic_20642049ddd.pdf) (206k pdf)**
- **[Dimension diagrams of the QTR/QTRX Reflectance Sensor Arrays](https://core-electronics.com.au/attachments/localcontent/qtr-qtrx-dimensions_11729b1aebc.pdf) (1MB pdf)**
- **[3D models (STEP) of the QTR/QTRX Reflectance Sensor Arrays](https://core-electronics.com.au/attachments/localcontent/qtr-qtrx-models_499007b3ad7.zip) (50MB zip)**
    
    This file contains 3D models (in the step file format) of the QTR and QTRX Reflectance Sensor Arrays.
- **[Drill guides (DXF) for the QTR/QTRX Reflectance Sensor Arrays](https://core-electronics.com.au/attachments/localcontent/qtr-qtrx-drill-drawings_858437d6710.zip) (86k zip)**
    
    These DXF drawings show the locations of all of the holes on the QTR and QTRX Reflectance Sensor Arrays.
 
### **Recommended links**

- **[Arduino library for the Pololu QTR Reflectance Sensors](https://github.com/pololu/qtr-sensors-arduino)**
    
    This library for [Arduino](https://core-electronics.com.au/hardware.html) makes it easy to interface with Pololu [QTR Reflectance Sensors](https://core-electronics.com.au/category/123/pololu-qtr-reflectance-sensors).

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/i/m/image_7113.jpg)