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QTR-1A Reflectance Sensor (2-Pack)
The QTR-1A reflectance sensor carries a single infrared LED and phototransistor pair in an inexpensive, tiny 0.5" x 0.3" module that can be mounted almost anywhere and is great for edge detection and line following. The reflectance measurement is output as an analog voltage. This sensor is sold in packs of two units.
Compare all products in Older QTR Sensors or
Single-Channel QTR Reflectance Sensors.
| Description | Specs (3) | Pictures (8) | Resources (11) | FAQs (1) | On the blog (2) | Distributors (65) |
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Dimensions
| Size: | 0.3″ × 0.5″ × 0.1″1 |
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| Weight: | 0.2 g2 |
Identifying markings
| PCB dev codes: | irs01a |
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Notes:
Coupon Discount
MEMORIALDAY26: Get 15% off one or more items with brand Pololu and an active status (limit 10 per item). This offer is valid through 27 May 2026.




















