1.27

50

1.27

50

12.15

478

2.50

98

Board dimensions (top view)1

Scale 3:1

Connector callouts (bottom view)2

Scale 3:1

Profile4

Scale 3:1 Scale 1:16

Actual sizeQTR sensor5

Scale 3:1

Isometric view3

Scale 3:1

4×1.02

40 5.1

200

20.0

787

2.5

100

2.5

98

2.18

86

Emitter

Phototransistor

1.02

40

1.5

59

1.1

43

1.

1.

R

https://www.pololu.com/category/123

Name:

Units:

Drawing date:

mm[mil]

Material:© 2019 Pololu Corporationmixed

Item number:

QTR-HD-01x Reflectance Sensor

15 February 2019

4101, 4201Intended for #2 and M2 screws.1.Grid lines indicate 2.54 mm [100 mil] spacing.2.To get the specified scale, select 100% in print settings.3.Drill location tolerance: ±0.1 [±5].4.Board edge tolerance: ±0.3 [±10].5.

Dev code:irs21a

Board dimensions (top view)1

Scale 3:1

Connector callouts (bottom view)2

Scale 3:1

Profile4

Scale 3:1 Scale 1:16

Actual sizeQTRX/QTRXL sensor5

Scale 3:1

Isometric view3

Scale 3:1

2.50

98

11.65

459

1.27

50

1.27

50

1.02

40

2.0

80

1.1

43

1.

1.

Shown in same

orientation as

in view 1.

2.18

86

2.5

98

2.5

100

5.1

200

20.0

787

R

https://www.pololu.com/category/123

Name:

Units:

Drawing date:

mm[mil]

Material:© 2019 Pololu Corporationmixed

Item number:

QTRX/QTRXL-HD-01x Reflectance Sensor

15 February 2019

4301, 4401, 4501, 4601Intended for #2 and M2 screws.1.Grid lines indicate 2.54 mm [100 mil] spacing.2.To get the specified scale, select 100% in print settings.3.Drill location tolerance: ±0.1 [±5].4.Board edge tolerance: ±0.3 [±10].5.

Dev code:irs21j

4×1.02

40

Emitter

Phototransistor

1.27

50

1.27

50

Board dimensions (top view)1

Scale 3:1

Connector callouts (bottom view)2

Scale 3:1

Profile4

Scale 3:1 Scale 1:16

Actual sizeQTR sensor5

Scale 3:1

Isometric view3

Scale 3:1

12.15

478

3.81

150

Emitter

Phototransistor

4×1.02

40

1.

1.

R

https://www.pololu.com/category/123

Name:

Units:

Drawing date:

mm[mil]

Material:© 2019 Pololu Corporationmixed

Item number:

QTR-MD-01x Reflectance Sensor

15 February 2019

4141, 4241Intended for #2 and M2 screws.1.Grid lines indicate 2.54 mm [100 mil] spacing.2.To get the specified scale, select 100% in print settings.3.Drill location tolerance: ±0.1 [±5].4.Board edge tolerance: ±0.3 [±10].5.

Dev code:irs21b

20.0

787

7.6

300

3.8

150

2.5

98

2.18

86

1.5

59

1.02

40

11.65

459

3.81

150

Board dimensions (top view)1

Scale 3:1

Connector callouts (bottom view)2

Scale 3:1

Profile4

Scale 3:1 Scale 1:16

Actual sizeQTRX/QTRXL sensor5

Scale 3:1

Isometric view3

Scale 3:1

1.27

50

1.27

50

3.8

150

2.5

98

20.0

787

7.6

300

2.18

86

R

https://www.pololu.com/category/123

Name:

Units:

Drawing date:

mm[mil]

Material:© 2019 Pololu Corporationmixed

Item number:

QTRX/QTRXL-MD-01x Reflectance Sensor

15 February 2019

4341, 4441, 4541, 4641Intended for #2 and M2 screws.1.Grid lines indicate 2.54 mm [100 mil] spacing.2.To get the specified scale, select 100% in print settings.3.Drill location tolerance: ±0.1 [±5].4.Board edge tolerance: ±0.3 [±10].5.

Dev code:irs21k

2.0

80

1.02

40

Emitter

Phototransistor

1.

1.

Shown in same

orientation as

in view 1.

4×1.02

40

12.15

478

3.08

121

4.00

157

Board dimensions (top view)1

Scale 3:1

Connector callouts (bottom view)2

Scale 3:1

Profile4

Scale 3:1 Scale 1:16

Actual sizeQTR sensor5

Scale 3:1

Isometric view3

Scale 3:1

1.27

50

1.27

50

R

https://www.pololu.com/category/123

Name:

Units:

Drawing date:

mm[mil]

Material:© 2019 Pololu Corporationmixed

Item number:

QTR-HD-02x Reflectance Sensor Array

15 February 2019

4102, 4202Intended for #2 and M2 screws.1.Grid lines indicate 2.54 mm [100 mil] spacing.2.To get the specified scale, select 100% in print settings.3.Drill location tolerance: ±0.1 [±5].4.Board edge tolerance: ±0.3 [±10].5.

Dev code:irs22a

2.18

86

2.5

98

5.1

200

20.0

787

10.2

400

1.

1.

Emitter

Phototransistor

5×1.02

40

1.5

59

1.02

40

1.27

50

1.27

50

6Scale 1:1

Actual sizeProfile4

Scale 3:1

Board dimensions (top view)1

Scale 3:1

Connector callouts (bottom view)2

Scale 3:1

QTRX/QTRXL sensor5

Scale 3:1

Isometric view3

Scale 3:1

4.00

157

3.08

121

11.70

461

5×1.02

40

1.

1.

Shown in same

orientation as

in view 1.

R

https://www.pololu.com/category/123

Name:

Units:

Drawing date:

mm[mil]

Material:© 2019 Pololu Corporationmixed

Item number:

QTRX-HD-02x Reflectance Sensor Array

15 February 2019

4302, 4402Intended for #2 and M2 screws.1.Grid lines indicate 2.54 mm [100 mil] spacing.2.To get the specified scale, select 100% in print settings.3.Drill location tolerance: ±0.1 [±5].4.Board edge tolerance: ±0.3 [±10].5.

Dev code:irs22j

Emitter

Phototransistor

5.1

200

10.2

400

2.18

86

2.5

98

20.0

787

2.0

80

1.02

40

B B

1.27

50

12.15

478

2.50

98

P

Board dimensions (top view)1

Scale 2:1

Connector callouts (bottom view)2

Scale 2:1

Profile3

Scale 2:1 4QTR sensor

Scale 2:1

1.02

40

1.5

59

Item numbers*

W (width)

P (pitch)

N (number of sensors)

BC

(hole count)

4103, 420313.0 [512]

4.00 [157]

31.42 [56]

74142, 4242 8.00

[315]2

4104, 420417.0 [669]

4.00 [157] 4

3.42 [135] 8

4105, 420521.0 [827]

4.00 [157] 5

4.15 [163] 9

4143, 42438.00 [315] 3

4106, 420625.0 [984]

4.00 [157] 6

6.15 [242] 10

4107, 420729.0

[1142]

4.00 [157] 7

6.88 [271] 11

4144, 42448.00 [315] 4

4108, 420833.0

[1299]4.00 [157] 8

8.88 [350] 12

4109, 420937.0

[1457]

4.00 [157]

99.61 [378]

134145, 4245 8.00

[315]5

4111, 421145.0

[1772]

4.00 [157]

1112.34 [486]

154146, 4246 8.00

[315]6

4113, 421353.0

[2087]

4.00 [157]

1315.07 [593]

174147, 4247 8.00

[315]7

4115, 421561.0

[2402]

4.00 [157] 15

17.80 [701] 19

4108, 42088.00 [315] 8

4117, 421769.0

[2717]

4.00 [157] 17

20.53 [808] 21

4109, 42098.00 [315] 9

4119, 421977.0

[3031]

4.00 [157] 19

23.26 [916] 23

4110, 42108.00 [315] 10

1.

1.

*Some items available by special order only.

R

https://www.pololu.com/category/123

Name:

Units:

Drawing date:

mm[mil]

Material:© 2019 Pololu Corporationmixed

Item number:

QTR Reflectance Sensor Array

15 February 2019

see tableIntended for #2 and M2 screws.1.Grid lines indicate 2.54 mm [100 mil] spacing.2.To get the specified scale, select 100% in print settings.3.Drill location tolerance: ±0.1 [±5].4.Board edge tolerance: ±0.3 [±10].5.

Dev code:irs23a-irs39a

W

20.0

787

2.5

98

2.5

98

2.5

98

2×

2.18

86

C×1.02

40

Emitter

Phototransistor

B B

1.27

50

12.15

478

2.50

98

P

P

11.65

459

2.50

98

B B

1.27

50

Board dimensions (top view)1

Scale 2:1

Connector callouts (bottom view)2

Scale 2:1

Profile3

Scale 2:1QTRX/QTRXL sensor

4Scale 2:1

20.0

787

2×2.18

86

2.5

98

W

2.5

98

2.5

98

2.0

80

1.02

40

Item numbers*

W (width)

P (pitch)

N (number of sensors)

BC

(hole count)

4303, 440313.0 [512]

4.00 [157]

31.42 [56]

74342, 4442 8.00

[315]2

4304, 440417.0 [669]

4.00 [157] 4

3.42 [135] 8

4305, 440521.0 [827]

4.00 [157] 5

4.15 [163] 9

4343, 44438.00 [315] 3

4306, 440625.0 [984]

4.00 [157] 6

6.15 [242] 10

4307, 440729.0

[1142]

4.00 [157] 7

6.88 [271] 11

4344, 44448.00 [315] 4

4308, 440833.0

[1299]4.00 [157] 8

8.88 [350] 12

4309, 440937.0

[1457]

4.00 [157]

99.61 [378]

134345, 4445 8.00

[315]5

4311, 441145.0

[1772]

4.00 [157]

1112.34 [486]

154346, 4446 8.00

[315]6

4313, 441353.0

[2087]

4.00 [157]

1315.07 [593]

174347, 4447 8.00

[315]7

4315, 441561.0

[2402]

4.00 [157] 15

17.80 [701] 19

4348, 44488.00 [315] 8

4317, 441769.0

[2717]

4.00 [157] 17

20.53 [808] 21

4349, 44498.00 [315] 9

4319, 441977.0

[3031]

4.00 [157] 19

23.26 [916] 23

4350, 44508.00 [315] 10

1.

1.

*Some items available by special order only.

Shown in same

orientation as

in view 1.

C×1.02

40

R

https://www.pololu.com/category/123

Name:

Units:

Drawing date:

mm[mil]

Material:© 2019 Pololu Corporationmixed

Item number:

QTRX Reflectance Sensor Array

15 February 2019

see tableIntended for #2 and M2 screws.1.Grid lines indicate 2.54 mm [100 mil] spacing.2.To get the specified scale, select 100% in print settings.3.Drill location tolerance: ±0.1 [±5].4.Board edge tolerance: ±0.3 [±10].5.

Dev code:irs23j-irs39j

Emitter

Phototransistor

P

11.65

459

2.50

98

B B

1.27

50

B B

1.27

50

2.50

98

12.15

478

P

Board dimensions (top view)1

Scale 4:3

Connector callouts (bottom view)2

Scale 4:3

Profile3

Scale 4:34

QTR sensor

Scale 4:3

C×1.02

40

R

https://www.pololu.com/category/123

Name:

Units:

Drawing date:

mm[mil]

Material:© 2019 Pololu Corporationmixed

Item number:

QTR Reflectance Sensor Array

15 February 2019

see tableIntended for #2 and M2 screws.1.Grid lines indicate 2.54 mm [100 mil] spacing.2.To get the specified scale, select 100% in print settings.3.Drill location tolerance: ±0.1 [±5].4.Board edge tolerance: ±0.3 [±10].5.

Dev code:irs41a-irs49d

Item numbers*

W (width)

P (pitch)

N (number of sensors)

BC

(hole count)

4121, 422185

[3346]

4.00 [157]

21 24.72 [973]

30

4151, 4251 8.00 [315]

11 31.07 [1123]

20

4123, 422393

[3661]

4.00 [157] 23

27.45 [1081] 32

4152, 42528.00 [315] 12

35.07 [1381] 20

4125, 4225101

[3976]

4.00 [157] 25

30.18 [1188] 34

4153, 42538.00 [315] 13

37.80 [1488] 22

4127, 4227109

[4291]

4.00 [157] 27

32.91 [1296] 36

4154, 42548.00 [315] 14

41.80 [1646] 22

4129, 4229117

[4606]

4.00 [157] 29

35.64 [1403] 38

4155, 4255 8.00 [315]

15 44.53 [1753]

24

1.

1.

*Some items available by special order only.

2×2.18

86

2.5

98

2.5

98

W

2.5

98

Emitter

Phototransistor

1.57

62

1.5

59

B B

1.27

50

2.50

98

12.15

478

P

P

2.50

98

11.65

459

B

1.27

50

B

Board dimensions (top view)1

Scale 4:3

Connector callouts (bottom view)2

Scale 4:3

Profile3

Scale 4:3QTRX/QTRXL sensor

4Scale 4:3

2.0

80

1.57

62

2.5

98

2.5

98

2×

2.18

86

2.5

98

W

Item numbers*

W (width)

P (pitch)

N (number of sensors)

BC

(hole count)

4321, 442185

[3346]

4.00 [157]

21 24.72 [973]

30

4351, 4451 8.00 [315]

11 31.07 [1123]

20

4323, 442393

[3661]

4.00 [157] 23

27.45 [1081] 32

4352, 44528.00 [315] 12

35.07 [1381] 20

4325, 4425101

[3976]

4.00 [157] 25

30.18 [1188] 34

4353, 44538.00 [315] 13

37.80 [1488] 22

4327, 4427109

[4291]

4.00 [157] 27

32.91 [1296] 36

4354, 44548.00 [315] 14

41.80 [1646] 22

4329, 4429117

[4606]

4.00 [157] 29

35.64 [1403] 38

4355, 4455 8.00 [315]

15 44.53 [1753]

24

1.

1.

*Some items available by special order only.

Shown in same

orientation as

in view 1.

R

https://www.pololu.com/category/123

Name:

Units:

Drawing date:

mm[mil]

Material:© 2019 Pololu Corporationmixed

Item number:

QTRX Reflectance Sensor Array

15 February 2019

see tableIntended for #2 and M2 screws.1.Grid lines indicate 2.54 mm [100 mil] spacing.2.To get the specified scale, select 100% in print settings.3.Drill location tolerance: ±0.1 [±5].4.Board edge tolerance: ±0.3 [±10].5.

Dev code:irs41j-irs49m

C×1.02

40

Emitter

Phototransistor

P

2.50

98

11.65

459

B

1.27

50

B

1.27

50

38.37

1511

38.37

1511

2.50

98

4.00

157

12.15

478

Board dimensions (top view)1

Scale 1:1

Connector callouts (bottom view)2

Scale 1:1

3Profile

Scale 1:1

QTR sensor4

Scale 2:1

Isometric view5

Scale 1:1

1.57

62

1.5

59

R

https://www.pololu.com/category/123

Name:

Units:

Drawing date:

mm[mil]

Material:© 2019 Pololu Corporationmixed

Item number:

QTR-HD-31x Reflectance Sensor Array

15 February 2019

4131, 4231Intended for #2 and M2 screws.1.Grid lines indicate 2.54 mm [100 mil] spacing.2.To get the specified scale, select 100% in print settings.3.Drill location tolerance: ±0.1 [±5].4.Board edge tolerance: ±0.3 [±10].5.

Dev code:irs51a

1.27

50

40×1.02

40

28.0

1102

28.0

1102

2.5

98

125.0

4921

4×2.18

86 64.0

2520

2.5

98

16.5

650

1.

1.

Emitter

Phototransistor

Board dimensions (top view)1

Scale 1:1

Connector callouts (bottom view)2

Scale 1:1

3Profile

Scale 1:1

QTR sensor4

Scale 2:1

Isometric view5

Scale 1:1

2.50

98

12.15

478

8.00

315

48.53

1911

48.53

1911

1.27

50

R

https://www.pololu.com/category/123

Name:

Units:

Drawing date:

mm[mil]

Material:© 2019 Pololu Corporationmixed

Item number:

QTR-MD-16x Reflectance Sensor Array

15 February 2019

4156, 4256Intended for #2 and M2 screws.1.Grid lines indicate 2.54 mm [100 mil] spacing.2.To get the specified scale, select 100% in print settings.3.Drill location tolerance: ±0.1 [±5].4.Board edge tolerance: ±0.3 [±10].5.

Dev code:irs51d

1.57

62

1.5

59

Emitter

Phototransistor

1.

1.

125.0

4921

16.5

650

28.0

1102

64.0

2520

4×2.18

86 28.0

1102

2.5

98

2.5

98

24×1.02

40

38.37

1511

38.37

1511

1.27

50

Board dimensions (top view)1

Scale 1:1

Connector callouts (bottom view)2

Scale 1:1

QTRX/QTRXL sensor4

Scale 2:13

Profile

Scale 1:1

Isometric view5

Scale 1:1

11.65

459

2.50

98

4.00

157

2.0

80

1.57

62

40×1.02

40

1.

1.

Shown in same

orientation as

in view 1.

R

https://www.pololu.com/category/123

Name:

Units:

Drawing date:

mm[mil]

Material:© 2019 Pololu Corporationmixed

Item number:

QTRX-HD-31x Reflectance Sensor Array

15 February 2019

4331, 4431Intended for #2 and M2 screws.1.Grid lines indicate 2.54 mm [100 mil] spacing.2.To get the specified scale, select 100% in print settings.3.Drill location tolerance: ±0.1 [±5].4.Board edge tolerance: ±0.3 [±10].5.

Dev code:irs51j

125.0

4921

16.5

650

64.0

2520

28.0

1102

28.0

1102

2.5

98

2.5

98

4×2.18

86

Emitter

Phototransistor

Connector callouts (bottom view)2

Scale 1:1

3Profile

Scale 1:1

Isometric view5

Scale 1:1

QTRX/QTRXL sensor4

Scale 2:1

Board dimensions (top view)1

Scale 1:1

48.53

1911

48.53

1911

1.27

50

2.50

98

8.00

315

11.65

459

2.0

80

1.57

62

24×1.02

40

Emitter

Phototransistor

1.

1.

Shown in same

orientation as

in view 1.

R

https://www.pololu.com/category/123

Name:

Units:

Drawing date:

mm[mil]

Material:© 2019 Pololu Corporationmixed

Item number:

QTRX-MD-16x Reflectance Sensor Array

15 February 2019

4356, 4456Intended for #2 and M2 screws.1.Grid lines indicate 2.54 mm [100 mil] spacing.2.To get the specified scale, select 100% in print settings.3.Drill location tolerance: ±0.1 [±5].4.Board edge tolerance: ±0.3 [±10].5.

Dev code:irs51m

125.0

4921

16.5

650

4×2.18

86 28.0

1102

64.0

2520

28.0

1102

2.5

98

2.5

98