4443
QTRX-MD-03A Reflectance Sensor Array: 3-Channel, 8mm Pitch, Analog Output, Low Current
£4.25
£3.54
This array of IR LED/phototransistor pairs is great for precisely identifying changes in reflectance (like line detection). It operates from 2.9 V to 5.5 V and offers dimmable brightness control independent of the supply voltage.
In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 30 mm. This version features high-performance, low-current QTRX sensors with lenses.
Specifications
- Dimensions: 21.0 × 20.0 × 3.0 mm
- Operating voltage: 2.9 V to 5.5 V
- Sensor type: QTRX
- Sensor count: 3
- Sensor pitch: 8 mm
- Full-brightness LED current: 3.5 mA (independent of supply voltage)
- Max board current: 9 mA
- Output format: analog voltages (0 V to VCC)
- Optimal sensing distance: 10 mm
- Maximum recommended sensing distance: 30 mm
- Weight: 1.1 g
| pitch × sensors | size (mm) | output | max current | optimal range | |
|---|---|---|---|---|---|
| LED | board | ||||
| 8 mm × 3 | 21.0 × 20.0 | analog | 3.5 mA | 9 mA | 10 mm |
General specifications
| Maximum range: | 30 mm |
|---|---|
| Optimal range: | 10 mm |
| Minimum operating voltage: | 2.9 V |
| Maximum operating voltage: | 5.5 V |
| LED current: | 3.5 mA1 |
| Peak wavelength: | 940 nm |
| Maximum current draw: | 9 mA2 |
| Sensor type: | QTRX |
| Sensor pitch: | 8.0 mm |
| Sensor count: | 3 |
| Output type: | A (analog voltages) |
Identifying markings
| PCB dev codes: | irs25j3 |
|---|---|
| Other PCB markings: | 0J113813 |
Notes:
- 1
- Can be dynamically reduced to any of 32 available dimming levels.
- 2
- With all LEDs on at max brightness setting.
- 3
- Note: this does not differentiate between the A and RC output types.
Documentation
Pololu QTR Reflectance Sensor Application Note (Printable PDF)
Arduino Library for the Pololu QTR Reflectance Sensors (Printable PDF)
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