Sensors » Pololu QTR Reflectance Sensors » Medium-Density (MD) QTR Arrays »
QTRX-MD-01A-S Reflectance Sensor: 1-Channel, 8mm Wide, Analog Output, Low Current, Side-Entry Connector
| sensors | size (mm) |
output | max current | optimal range |
connector | |
|---|---|---|---|---|---|---|
| LED | board | |||||
| 1 | 8.1 × 15.2 | analog | 3.5 mA | 5 mA | 10 mm | side-entry |
This sensor uses an IR LED and a phototransistor to measure the light reflected from nearby surfaces. It operates from 2.9–5.5 V, with dimmable brightness control independent of the supply voltage. The optimal range is <5 mm, but it can detect high-reflectance objects out to around 30 mm. This version features a high-performance, low-current QTRX sensor with lenses and a connector that works with our 4-pin JST SH-style cables (compatible with SparkFun’s Qwiic and Adafruit’s STEMMA QT cables, but the interface is not I²C).
Alternatives available with variations in these parameter(s):
Compare all products in Medium-Density (MD) QTR Arrays or Single-Channel QTR Reflectance Sensors.
| Description | Resources (6) | FAQs (0) | sedog (5) |
|---|
 |
QTRX-MD-01A-S Reflectance Sensor. |
|---|
 |
QTRX-MD-01A-S Reflectance Sensor, front and back views. |
|---|
 |
QTRX/QTRXL-MD-01A-S Reflectance Sensor, connector side. |
|---|
 |
QTRX/QTRXL-MD-01A-S Reflectance Sensor, connector view with basic dimensions and a US quarter for size reference. |
|---|
 |
Pinout of the QTRX/QTRXL-MD-01x-S Reflectance Sensor (QTRX-MD-01RC-S version pictured, cable not included). |
|---|
 |
We can customize the QTRX/QTRXL-MD-01x-S to have a vertical connector instead of the standard side-entry one. |
|---|
 |
We can customize the QTRX/QTRXL-MD-01x-S to have a vertical connector instead of the standard side-entry one. |
|---|
 |
Demo of IR LED dimming and independent even/odd control on the QTRX-HD-07x (as seen through an old digital camera that can see IR). |
|---|
 |
Schematic diagrams of individual QTR sensor channels for A version (left) and RC version (right). This applies only to the newer QTRs with dimmable emitters. |
|---|
 |
The QTR Reflectance Sensor Arrays are available in many different sizes. |
|---|
Related categories
Home | Forum | Blog | Support | Ordering Information | Lists | sedog | BIG Order Form | About | Contact
© 2001–2026 Pololu Corporation
