Electronics » Sensors » Pololu QTR Reflectance Sensors »
Medium-Density (MD) QTR Arrays
These reflectance sensors feature a linear array of IR emitter/phototransistor pair modules that are 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. A variety of sensor counts and densities is available so you can pick the ideal arrangement for your application. Since the outputs are all independent, you can connect just some of the channels to attain an irregular or non-standard sensor spacing.
The following tables show all of the QTR/QTRX/QTRXL reflectance sensor arrays with IR emitter/phototransistor pair modules that are arranged in a medium-density (MD), 8 mm pitch. We also have high-density (HD) versions available with sensors arranged on an 4 mm pitch.
| QTR sensors 2.9 V to 5.5 V; 30 mA max LED current(1); 5 mm optimal range |
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| Board width |
Configuration | Max board current(2) |
Max range | Output type |
Name | 1-piece price |
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| 7.5 mm | 1 sensor (MD) |
32 mA | 30 mm | analog | QTR-MD-01A | $2.15 | |||||||||||||||||||||||||||||||
| RC (digital) | QTR-MD-01RC | $2.15 | |||||||||||||||||||||||||||||||||||
| 13.0 mm | 8 mm × 2 |
32 mA | 30 mm | analog | QTR-MD-02A | $2.80 | |||||||||||||||||||||||||||||||
| RC (digital) | QTR-MD-02RC | $2.80 | |||||||||||||||||||||||||||||||||||
| 21.0 mm | 8 mm × 3 |
62 mA | 30 mm | analog | QTR-MD-03A | $3.51 | |||||||||||||||||||||||||||||||
| RC (digital) | QTR-MD-03RC | $3.51 | |||||||||||||||||||||||||||||||||||
| 29.0 mm | 8 mm × 4 |
62 mA | 40 mm | analog | QTR-MD-04A | $4.22 | |||||||||||||||||||||||||||||||
| RC (digital) | QTR-MD-04RC | $4.22 | |||||||||||||||||||||||||||||||||||
| 37.0 mm | 8 mm × 5 |
93 mA | 40 mm | analog | QTR-MD-05A | $5.82 | |||||||||||||||||||||||||||||||
| RC (digital) | QTR-MD-05RC | $5.82 | |||||||||||||||||||||||||||||||||||
| 45.0 mm | 8 mm × 6 |
93 mA | 40 mm | analog | QTR-MD-06A | $6.53 | |||||||||||||||||||||||||||||||
| RC (digital) | QTR-MD-06RC | $6.53 | |||||||||||||||||||||||||||||||||||
| 53.0 mm | 8 mm × 7 |
125 mA | 40 mm | analog | QTR-MD-07A | $7.24 | |||||||||||||||||||||||||||||||
| RC (digital) | QTR-MD-07RC | $7.24 | |||||||||||||||||||||||||||||||||||
| 61.0 mm | 8 mm × 8 |
125 mA | 40 mm | analog | QTR-MD-08A | $7.95 | |||||||||||||||||||||||||||||||
| RC (digital) | QTR-MD-08RC | $7.95 | |||||||||||||||||||||||||||||||||||
| 101.0 mm | 8 mm × 13 |
220 mA | 40 mm | analog | QTR-MD-13A | $13.28 | |||||||||||||||||||||||||||||||
| RC (digital) | QTR-MD-13RC | $13.28 | |||||||||||||||||||||||||||||||||||
| 125.0 mm | 8 mm × 16 |
250 mA | 50 mm | analog | QTR-MD-16A | $15.41 | |||||||||||||||||||||||||||||||
| RC (digital) | QTR-MD-16RC | $15.41 | |||||||||||||||||||||||||||||||||||
| QTRX sensors 2.9 V to 5.5 V; 3.5 mA max LED current(1); 10 mm optimal range |
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| Board width |
Configuration | Max board current(2) |
Max range | Output type |
Name | 1-piece price |
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| 7.5 mm | 1 sensor (MD) |
5 mA | 30 mm | analog | QTRX-MD-01A | $2.89 | |||||||||||||||||||||||||||||||
| RC (digital) | QTRX-MD-01RC | $2.89 | |||||||||||||||||||||||||||||||||||
| 13.0 mm | 8 mm × 2 |
5 mA | 30 mm | analog | QTRX-MD-02A | $4.28 | |||||||||||||||||||||||||||||||
| RC (digital) | QTRX-MD-02RC | $4.28 | |||||||||||||||||||||||||||||||||||
| 21.0 mm | 8 mm × 3 |
9 mA | 30 mm | analog | QTRX-MD-03A | $5.73 | |||||||||||||||||||||||||||||||
| RC (digital) | QTRX-MD-03RC | $5.73 | |||||||||||||||||||||||||||||||||||
| 29.0 mm | 8 mm × 4 |
9 mA | 40 mm | analog | QTRX-MD-04A | $7.18 | |||||||||||||||||||||||||||||||
| RC (digital) | QTRX-MD-04RC | $7.18 | |||||||||||||||||||||||||||||||||||
| 37.0 mm | 8 mm × 5 |
14 mA | 40 mm | analog | QTRX-MD-05A | $9.52 | |||||||||||||||||||||||||||||||
| RC (digital) | QTRX-MD-05RC | $9.52 | |||||||||||||||||||||||||||||||||||
| 45.0 mm | 8 mm × 6 |
14 mA | 40 mm | analog | QTRX-MD-06A | $10.97 | |||||||||||||||||||||||||||||||
| RC (digital) | QTRX-MD-06RC | $10.97 | |||||||||||||||||||||||||||||||||||
| 53.0 mm | 8 mm × 7 |
17 mA | 40 mm | analog | QTRX-MD-07A | $12.42 | |||||||||||||||||||||||||||||||
| RC (digital) | QTRX-MD-07RC | $12.42 | |||||||||||||||||||||||||||||||||||
| 61.0 mm | 8 mm × 8 |
17 mA | 40 mm | analog | QTRX-MD-08A | $13.87 | |||||||||||||||||||||||||||||||
| RC (digital) | QTRX-MD-08RC | $13.87 | |||||||||||||||||||||||||||||||||||
| 101.0 mm | 8 mm × 13 |
31 mA | 40 mm | analog | QTRX-MD-13A | $22.90 | |||||||||||||||||||||||||||||||
| RC (digital) | QTRX-MD-13RC | $22.90 | |||||||||||||||||||||||||||||||||||
| 125.0 mm | 8 mm × 16 |
34 mA | 50 mm | analog | QTRX-MD-16A | $27.25 | |||||||||||||||||||||||||||||||
| RC (digital) | QTRX-MD-16RC | $27.25 | |||||||||||||||||||||||||||||||||||
| QTRXL sensors 2.9 V to 5.5 V; 30 mA max LED current(1); 20 mm optimal range |
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| Board width |
Configuration | Max board current(2) |
Max range | Output type |
Name | 1-piece price |
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| 7.5 mm | 1 sensor (MD) |
32 mA | 80 mm | analog | QTRXL-MD-01A | $2.89 | |||||||||||||||||||||||||||||||
| RC (digital) | QTRXL-MD-01RC | $2.89 | |||||||||||||||||||||||||||||||||||
| 1 Can be dynamically reduced to any of 32 available dimming levels. 2 With all LEDs on at max brightness setting. |
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These modules all operate from 2.9 V to 5.5 V and offer dimmable brightness control independent of the supply voltage, and units with 11 or more sensors provide separate controls for the odd-numbered and even-numbered LEDs, which gives you extra options for detecting light reflected at various angles. Two different sensor options are available, denoted by “QTR” or “QTRX” in the product name. The “QTR” versions feature lower-cost sensor modules without lenses while the “QTRX” versions feature higher-performance sensor modules with lenses, which allow similar performance at a much lower IR LED current. We also have several single-channel modules with the “QTRXL” designator that offer extra-long range by using the QTRX-style sensor module with higher current through the emitter.
Each sensor option is available in two output types: an “A” version with analog voltage outputs between 0 V and VCC, and an “RC” version with outputs that can be read with a digital I/O line on a microcontroller by first setting the lines high and then releasing them and timing how long it takes them to read as low (typically anywhere from a few microseconds to a few milliseconds).
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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. |
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Compare all products in this category
Products in category “Medium-Density (MD) QTR Arrays”
| Pololu item #: 4541 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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| sensors | size (mm) |
output | max current | optimal range |
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| LED | board | ||||
| 1 | 7.5 × 20.0 | RC (digital) | 30 mA | 32 mA | 20 mm |
This IR LED/phototransistor pair is great for precisely identifying changes in reflectance (like line detection). It operates from 2.9 V to 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 80 mm. This version features a high-performance QTRXL sensor with lenses and a high-brightness emitter for extra-long range.
| Pololu item #: 4641 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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| sensors | size (mm) |
output | max current | optimal range |
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| LED | board | ||||
| 1 | 7.5 × 20.0 | analog | 30 mA | 32 mA | 20 mm |
This IR LED/phototransistor pair is great for precisely identifying changes in reflectance (like line detection). It operates from 2.9 V to 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 80 mm. This version features a high-performance QTRXL sensor with lenses and a high-brightness emitter for extra-long range.
| Pololu item #: 4341 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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| sensors | size (mm) |
output | max current | optimal range |
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| LED | board | ||||
| 1 | 7.5 × 20.0 | RC (digital) | 3.5 mA | 5 mA | 10 mm |
This IR LED/phototransistor pair is great for precisely identifying changes in reflectance (like line detection). It operates from 2.9 V to 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 30 mm. This version features a high-performance, low-current QTRX sensor with lenses.
| Pololu item #: 4441 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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| sensors | size (mm) |
output | max current | optimal range |
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| LED | board | ||||
| 1 | 7.5 × 20.0 | analog | 3.5 mA | 5 mA | 10 mm |
This IR LED/phototransistor pair is great for precisely identifying changes in reflectance (like line detection). It operates from 2.9 V to 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 30 mm. This version features a high-performance, low-current QTRX sensor with lenses.
| Pololu item #: 4141 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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| sensors | size (mm) |
output | max current | optimal range |
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| LED | board | ||||
| 1 | 7.5 × 20.0 | RC (digital) | 30 mA | 32 mA | 5 mm |
This IR LED/phototransistor pair is great for precisely identifying changes in reflectance (like line detection). It operates from 2.9 V to 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 30 mm. This version features a traditional-style QTR sensor without lenses.
| Pololu item #: 4241 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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| sensors | size (mm) |
output | max current | optimal range |
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|---|---|---|---|---|---|
| LED | board | ||||
| 1 | 7.5 × 20.0 | analog | 30 mA | 32 mA | 5 mm |
This IR LED/phototransistor pair is great for precisely identifying changes in reflectance (like line detection). It operates from 2.9 V to 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 30 mm. This version features a traditional-style QTR sensor without lenses.
| Pololu item #: 4142 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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| pitch × sensors | size (mm) |
output | max current | optimal range |
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|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 2 | 13.0 × 20.0 | RC (digital) | 30 mA | 32 mA | 5 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 30 mm. This version features the traditional-style QTR sensors without lenses.
| Pololu item #: 4242 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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| pitch × sensors | size (mm) |
output | max current | optimal range |
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|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 2 | 13.0 × 20.0 | analog | 30 mA | 32 mA | 5 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 30 mm. This version features the traditional-style QTR sensors without lenses.
| Pololu item #: 4342 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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| pitch × sensors | size (mm) |
output | max current | optimal range |
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|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 2 | 13.0 × 20.0 | RC (digital) | 3.5 mA | 5 mA | 10 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 30 mm. This version features high-performance, low-current QTRX sensors with lenses.
| Pololu item #: 4442 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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| pitch × sensors | size (mm) |
output | max current | optimal range |
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|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 2 | 13.0 × 20.0 | analog | 3.5 mA | 5 mA | 10 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 30 mm. This version features high-performance, low-current QTRX sensors with lenses.
| Pololu item #: 4143 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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| pitch × sensors | size (mm) |
output | max current | optimal range |
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| LED | board | ||||
| 8 mm × 3 | 21.0 × 20.0 | RC (digital) | 30 mA | 62 mA | 5 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 30 mm. This version features the traditional-style QTR sensors without lenses.
| Pololu item #: 4243 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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| pitch × sensors | size (mm) |
output | max current | optimal range |
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| LED | board | ||||
| 8 mm × 3 | 21.0 × 20.0 | analog | 30 mA | 62 mA | 5 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 30 mm. This version features the traditional-style QTR sensors without lenses.
| Pololu item #: 4343 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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| pitch × sensors | size (mm) |
output | max current | optimal range |
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|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 3 | 21.0 × 20.0 | RC (digital) | 3.5 mA | 9 mA | 10 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 30 mm. This version features high-performance, low-current QTRX sensors with lenses.
| Pololu item #: 4443 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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| pitch × sensors | size (mm) |
output | max current | optimal range |
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|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 3 | 21.0 × 20.0 | analog | 3.5 mA | 9 mA | 10 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 30 mm. This version features high-performance, low-current QTRX sensors with lenses.
| Pololu item #: 4344 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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| pitch × sensors | size (mm) |
output | max current | optimal range |
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|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 4 | 29.0 × 20.0 | RC (digital) | 3.5 mA | 9 mA | 10 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 40 mm. This version features high-performance, low-current QTRX sensors with lenses.
| Pololu item #: 4444 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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| pitch × sensors | size (mm) |
output | max current | optimal range |
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|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 4 | 29.0 × 20.0 | analog | 3.5 mA | 9 mA | 10 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 40 mm. This version features high-performance, low-current QTRX sensors with lenses.
| Pololu item #: 4144 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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| pitch × sensors | size (mm) |
output | max current | optimal range |
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|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 4 | 29.0 × 20.0 | RC (digital) | 30 mA | 62 mA | 5 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 40 mm. This version features the traditional-style QTR sensors without lenses.
| Pololu item #: 4244 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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| pitch × sensors | size (mm) |
output | max current | optimal range |
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|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 4 | 29.0 × 20.0 | analog | 30 mA | 62 mA | 5 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 40 mm. This version features the traditional-style QTR sensors without lenses.
| Pololu item #: 4145 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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| pitch × sensors | size (mm) |
output | max current | optimal range |
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|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 5 | 37.0 × 20.0 | RC (digital) | 30 mA | 93 mA | 5 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 40 mm. This version features the traditional-style QTR sensors without lenses.
| Pololu item #: 4245 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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| pitch × sensors | size (mm) |
output | max current | optimal range |
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|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 5 | 37.0 × 20.0 | analog | 30 mA | 93 mA | 5 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 40 mm. This version features the traditional-style QTR sensors without lenses.
| Pololu item #: 4345 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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| pitch × sensors | size (mm) |
output | max current | optimal range |
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|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 5 | 37.0 × 20.0 | RC (digital) | 3.5 mA | 14 mA | 10 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 40 mm. This version features high-performance, low-current QTRX sensors with lenses.
| Pololu item #: 4445 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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| pitch × sensors | size (mm) |
output | max current | optimal range |
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|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 5 | 37.0 × 20.0 | analog | 3.5 mA | 14 mA | 10 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 40 mm. This version features high-performance, low-current QTRX sensors with lenses.
| Pololu item #: 4146 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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| pitch × sensors | size (mm) |
output | max current | optimal range |
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|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 6 | 45.0 × 20.0 | RC (digital) | 30 mA | 93 mA | 5 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 40 mm. This version features the traditional-style QTR sensors without lenses.
| Pololu item #: 4246 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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| pitch × sensors | size (mm) |
output | max current | optimal range |
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|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 6 | 45.0 × 20.0 | analog | 30 mA | 93 mA | 5 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 40 mm. This version features the traditional-style QTR sensors without lenses.
| Pololu item #: 4346 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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| pitch × sensors | size (mm) |
output | max current | optimal range |
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|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 6 | 45.0 × 20.0 | RC (digital) | 3.5 mA | 14 mA | 10 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 40 mm. This version features high-performance, low-current QTRX sensors with lenses.
| Pololu item #: 4446 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
|
|
| pitch × sensors | size (mm) |
output | max current | optimal range |
|
|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 6 | 45.0 × 20.0 | analog | 3.5 mA | 14 mA | 10 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 40 mm. This version features high-performance, low-current QTRX sensors with lenses.
| Pololu item #: 4347 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
|
|
| pitch × sensors | size (mm) |
output | max current | optimal range |
|
|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 7 | 53.0 × 20.0 | RC (digital) | 3.5 mA | 17 mA | 10 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 40 mm. This version features high-performance, low-current QTRX sensors with lenses.
| Pololu item #: 4447 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
|
|
| pitch × sensors | size (mm) |
output | max current | optimal range |
|
|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 7 | 53.0 × 20.0 | analog | 3.5 mA | 17 mA | 10 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 40 mm. This version features high-performance, low-current QTRX sensors with lenses.
| Pololu item #: 4147 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
|
|
| pitch × sensors | size (mm) |
output | max current | optimal range |
|
|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 7 | 53.0 × 20.0 | RC (digital) | 30 mA | 125 mA | 5 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 40 mm. This version features the traditional-style QTR sensors without lenses.
| Pololu item #: 4247 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
|
|
| pitch × sensors | size (mm) |
output | max current | optimal range |
|
|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 7 | 53.0 × 20.0 | analog | 30 mA | 125 mA | 5 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 40 mm. This version features the traditional-style QTR sensors without lenses.
| Pololu item #: 4348 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
|
|
| pitch × sensors | size (mm) |
output | max current | optimal range |
|
|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 8 | 61.0 × 20.0 | RC (digital) | 3.5 mA | 17 mA | 10 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 40 mm. This version features high-performance, low-current QTRX sensors with lenses.
| Pololu item #: 4448 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
|
|
| pitch × sensors | size (mm) |
output | max current | optimal range |
|
|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 8 | 61.0 × 20.0 | analog | 3.5 mA | 17 mA | 10 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 40 mm. This version features high-performance, low-current QTRX sensors with lenses.
| Pololu item #: 4148 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
|
|
| pitch × sensors | size (mm) |
output | max current | optimal range |
|
|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 8 | 61.0 × 20.0 | RC (digital) | 30 mA | 125 mA | 5 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 40 mm. This version features the traditional-style QTR sensors without lenses.
| Pololu item #: 4248 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
|
|
| pitch × sensors | size (mm) |
output | max current | optimal range |
|
|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 8 | 61.0 × 20.0 | analog | 30 mA | 125 mA | 5 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 40 mm. This version features the traditional-style QTR sensors without lenses.
| Pololu item #: 4353 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
|
|
| pitch × sensors | size (mm) |
output | max current | optimal range |
|
|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 13 | 101.0 × 16.5 | RC (digital) | 3.5 mA | 31 mA | 10 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage and separate controls for the odd and even emitters. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 40 mm. This version features high-performance, low-current QTRX sensors with lenses.
| Pololu item #: 4453 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
|
|
| pitch × sensors | size (mm) |
output | max current | optimal range |
|
|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 13 | 101.0 × 16.5 | analog | 3.5 mA | 31 mA | 10 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage and separate controls for the odd and even emitters. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 40 mm. This version features high-performance, low-current QTRX sensors with lenses.
| Pololu item #: 4153 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
|
|
| pitch × sensors | size (mm) |
output | max current | optimal range |
|
|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 13 | 101.0 × 16.5 | RC (digital) | 30 mA | 220 mA | 5 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage and separate controls for the odd and even emitters. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 40 mm. This version features the traditional-style QTR sensors without lenses.
| Pololu item #: 4253 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
|
|
| pitch × sensors | size (mm) |
output | max current | optimal range |
|
|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 13 | 101.0 × 16.5 | analog | 30 mA | 220 mA | 5 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage and separate controls for the odd and even emitters. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 40 mm. This version features the traditional-style QTR sensors without lenses.
| Pololu item #: 4356 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
|
|
| pitch × sensors | size (mm) |
output | max current | optimal range |
|
|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 16 | 125.0 × 16.5 | RC (digital) | 3.5 mA | 34 mA | 10 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage and separate controls for the odd and even emitters. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 50 mm. This version features high-performance, low-current QTRX sensors with lenses.
| Pololu item #: 4456 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
|
|
| pitch × sensors | size (mm) |
output | max current | optimal range |
|
|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 16 | 125.0 × 16.5 | analog | 3.5 mA | 34 mA | 10 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage and separate controls for the odd and even emitters. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 50 mm. This version features high-performance, low-current QTRX sensors with lenses.
| Pololu item #: 4156 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
|
|
| pitch × sensors | size (mm) |
output | max current | optimal range |
|
|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 16 | 125.0 × 16.5 | RC (digital) | 30 mA | 250 mA | 5 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage and separate controls for the odd and even emitters. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 50 mm. This version features the traditional-style QTR sensors without lenses.
| Pololu item #: 4256 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
|
|
| pitch × sensors | size (mm) |
output | max current | optimal range |
|
|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 16 | 125.0 × 16.5 | analog | 30 mA | 250 mA | 5 mm |
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 5.5 V and offers dimmable brightness control independent of the supply voltage and separate controls for the odd and even emitters. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 50 mm. This version features the traditional-style QTR sensors without lenses.
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