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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 (72) |
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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:
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Coupon Discount
BF25C123: Get 37% off one or more items from category Pololu QTR Reflectance Sensors (limit 4 per item). This offer is valid from 24 Nov 2025 to 01 Dec 2025.
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