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QTR-MD-01A-S Reflectance Sensor: 1-Channel, 8mm Wide, Analog Output, Side-Entry Connector
| sensors | size (mm) |
output | max current | optimal range |
connector | |
|---|---|---|---|---|---|---|
| LED | board | |||||
| 1 | 8.1 × 15.2 | analog | 30 mA | 32 mA | 5 mm | side-entry |
This sensor uses an IR LED and a phototransistor to measure the light reflected from nearby surfaces. It operates from 2.9–5.5 V, with dimmable brightness control independent of the supply voltage. The optimal range is <5 mm, but it can detect high-reflectance objects out to around 30 mm. This version features a traditional-style QTR sensor without lenses and a connector that works with our 4-pin JST SH-style cables (compatible with SparkFun’s Qwiic and Adafruit’s STEMMA QT cables, but the interface is not I²C).
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| Description | Specs (15) | Pictures (10) | Resources (6) | FAQs (0) | On the blog (0) | Distributors (0) |
|---|
Dimensions
| Size: | 8.1 × 15.2 × 5.5 mm |
|---|---|
| Weight: | 0.4 g |
General specifications
| Maximum range: | 30 mm |
|---|---|
| Optimal range: | 5 mm |
| Minimum operating voltage: | 2.9 V |
| Maximum operating voltage: | 5.5 V |
| Connector: | side-entry, 4-pin JST SH-type |
| LED current: | 30 mA1 |
| Peak wavelength: | 940 nm |
| Maximum current draw: | 32 mA2 |
| Sensor type: | QTR |
| Sensor count: | 1 |
| Output type: | A (analog voltages) |
Identifying markings
| PCB dev codes: | irs21c3 |
|---|---|
| Other PCB markings: | 0J158523 |
Notes:
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QTRSINTRO: Get 15% off one or more items from category Single-Channel QTR Reflectance Sensors (limit 5 per item). This offer is valid through 31 Oct 2025.
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