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QTR-3A Reflectance Sensor Array
This compact module packs three IR LED/phototransistor pairs onto a 1.25″ × 0.3″ board. The sensors are mounted on a 0.375″ pitch, making this array a great minimal sensing solution for a line-following robot. Each sensor provides a separate analog voltage output.
| Description | Specs (5) | Pictures (7) | Resources (11) | FAQs (0) | On the blog (2) | Distributors (53) |
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Dimensions
| Size: | 1.25″ × 0.3″1 |
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| Weight: | 0.6 g2 |
General specifications
| Supply current: | 50 mA |
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Identifying markings
| PCB dev codes: | irs07a |
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| Other PCB markings: | 0J7448 |
Notes:
Coupon Discount
25THANVC123: Get 25% off one or more items from category Pololu QTR Reflectance Sensors (limit 4 per item). This offer is valid through 30 Apr 2026.















