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Full machine-readable index: https://core-electronics.com.au/llms.txt # 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. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=POLOLU-4306:1` (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/POLOLU-4306:1.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 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)