Pololu QTR Reflectance Sensors

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 newer QTR/QTRX/QTRLX reflectance sensor arrays with black PCBs introduced starting in August 2018. This includes both high-density (HD), 4 mm pitch and medium-density (MD), 8 mm pitch versions. Our older QTR sensors can be found here.

QTR sensors
2.9 V to 5.5 V; 30 mA max LED current(1); 5 mm optimal range
Board
width
Configuration Max board
current(2)
Max range Output
type
Name 1-piece
price
5.0 mm 1 sensor (HD)
32 mA 30 mm analog QTR-HD-01A $1.79
RC (digital) QTR-HD-01RC
7.5 mm 1 sensor (MD)
32 mA 30 mm analog QTR-MD-01A $1.61
RC (digital) QTR-MD-01RC
10.2 mm 4 mm × 2
32 mA 30 mm analog QTR-HD-02A $2.12
RC (digital) QTR-HD-02RC
13.0 mm 8 mm × 2
32 mA 30 mm analog QTR-MD-02A $2.18
RC (digital) QTR-MD-02RC
4 mm × 3
62 mA 30 mm analog QTR-HD-03A $2.69
RC (digital) QTR-HD-03RC
17.0 mm 4 mm × 4
62 mA 40 mm analog QTR-HD-04A $3.26
RC (digital) QTR-HD-04RC
21.0 mm 8 mm × 3
62 mA 30 mm analog QTR-MD-03A $2.81
RC (digital) QTR-MD-03RC
4 mm × 5
93 mA 40 mm analog QTR-HD-05A $4.26
RC (digital) QTR-HD-05RC
25.0 mm 4 mm × 6
93 mA 40 mm analog QTR-HD-06A $4.83
RC (digital) QTR-HD-06RC
29.0 mm 8 mm × 4
62 mA 40 mm analog QTR-MD-04A $3.44
RC (digital) QTR-MD-04RC
4 mm × 7
125 mA 40 mm analog QTR-HD-07A $5.40
RC (digital) QTR-HD-07RC
37.0 mm 8 mm × 5
93 mA 40 mm analog QTR-MD-05A $4.50
RC (digital) QTR-MD-05RC
4 mm × 9
155 mA 40 mm analog QTR-HD-09A $6.97
RC (digital) QTR-HD-09RC
45.0 mm 8 mm × 6
93 mA 40 mm analog QTR-MD-06A $5.13
RC (digital) QTR-MD-06RC
4 mm × 11
185 mA 40 mm analog QTR-HD-11A $8.54
RC (digital) QTR-HD-11RC
61.0 mm 8 mm × 8
125 mA 40 mm analog QTR-MD-08A $6.39
RC (digital) QTR-MD-08RC
4 mm × 15
250 mA 50 mm analog QTR-HD-15A $10.82
RC (digital) QTR-HD-15RC
125.0 mm 4 mm × 31
495 mA 50 mm analog QTR-HD-31A $21.66
RC (digital) QTR-HD-31RC
QTRX sensors
2.9 V to 5.5 V; 3.5 mA max LED current(1); 10 mm optimal range
Board
width
Configuration Max board
current(2)
Max range Output
type
Name 1-piece
price
5.0 mm 1 sensor (HD)
5 mA 30 mm analog QTRX-HD-01A $2.17
RC (digital) QTRX-HD-01RC
7.5 mm 1 sensor (MD)
5 mA 30 mm analog QTRX-MD-01A $1.99
RC (digital) QTRX-MD-01RC
10.2 mm 4 mm × 2
5 mA 30 mm analog QTRX-HD-02A $2.88
RC (digital) QTRX-HD-02RC
13.0 mm 8 mm × 2
5 mA 30 mm analog QTRX-MD-02A $2.94
RC (digital) QTRX-MD-02RC
4 mm × 3
9 mA 30 mm analog QTRX-HD-03A $3.83
RC (digital) QTRX-HD-03RC
17.0 mm 4 mm × 4
9 mA 40 mm analog QTRX-HD-04A $4.78
RC (digital) QTRX-HD-04RC
21.0 mm 8 mm × 3
9 mA 30 mm analog QTRX-MD-03A $3.95
RC (digital) QTRX-MD-03RC
4 mm × 5
14 mA 40 mm analog QTRX-HD-05A $6.16
RC (digital) QTRX-HD-05RC
25.0 mm 4 mm × 6
14 mA 40 mm analog QTRX-HD-06A $7.11
RC (digital) QTRX-HD-06RC
29.0 mm 8 mm × 4
9 mA 40 mm analog QTRX-MD-04A $4.96
RC (digital) QTRX-MD-04RC
4 mm × 7
17 mA 40 mm analog QTRX-HD-07A $8.06
RC (digital) QTRX-HD-07RC
37.0 mm 8 mm × 5
14 mA 40 mm analog QTRX-MD-05A $6.40
RC (digital) QTRX-MD-05RC
4 mm × 9
22 mA 40 mm analog QTRX-HD-09A $10.39
RC (digital) QTRX-HD-09RC
45.0 mm 8 mm × 6
14 mA 40 mm analog QTRX-MD-06A $7.41
RC (digital) QTRX-MD-06RC
4 mm × 11
26 mA 40 mm analog QTRX-HD-11A $12.72
RC (digital) QTRX-HD-11RC
61.0 mm 8 mm × 8
17 mA 40 mm analog QTRX-MD-08A $9.43
RC (digital) QTRX-MD-08RC
4 mm × 15
34 mA 50 mm analog QTRX-HD-15A $16.52
RC (digital) QTRX-HD-15RC
125.0 mm 4 mm × 31
68 mA 50 mm analog QTRX-HD-31A $33.44
RC (digital) QTRX-HD-31RC
QTRXL sensors
2.9 V to 5.5 V; 30 mA max LED current(1); 20 mm optimal range
Board
width
Configuration Max board
current(2)
Max range Output
type
Name 1-piece
price
5.0 mm 1 sensor (HD)
32 mA 80 mm analog QTRXL-HD-01A $2.17
RC (digital) QTRXL-HD-01RC
7.5 mm 1 sensor (MD)
32 mA 80 mm analog QTRXL-MD-01A $1.99
RC (digital) QTRXL-MD-01RC
1 Can be dynamically reduced to any of 32 available dimming levels.
2 With all LEDs on at max brightness setting.

Subcategories

These reflectance sensors feature linear arrays of IR emitter/phototransistor pair modules in a high-density (4 mm pitch) arrangement. These products all start with the identifier QTR-HD or QTRX-HD and offer dimmable brightness control independent of the 2.9 V to 5.5 V supply voltage.

These reflectance sensors feature linear arrays of IR emitter/phototransistor pair modules in a medium-density (8 mm pitch) arrangement. These products all start with the identifier QTR-MD or QTRX-MD and offer dimmable brightness control independent of the 2.9 V to 5.5 V supply voltage.

This category contains our selection of QTR reflectance sensors without integrated LED drivers (so the emitter brightness depends on the supply voltage). These modules were all introduced prior to August 2018.


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