PololuPololu· Electronics
QTR-MD-02A Reflectance Sensor Array: 2-Channel, 8mm Pitch, Analog Output
Manufacturer part no. 4242
$3.44≈ 2.99 €
In stock — 122 units
- origin USA
- RoHS3
Estimated landed cost
| Item | €2.99 |
|---|---|
| Shipping | €25.00 |
| VAT (20%) | €5.60 |
| Total delivered | €33.59 |
Estimate for a single item delivered to mainland France, shipped from outside the EU: customs duty and clearance fees may apply and are charged by the carrier.
Volume pricing
| Qty | Unit price | Saving |
|---|---|---|
| ≥ 1 | $3.44 | |
| ≥ 5 | $3.16 | −8 % |
| ≥ 25 | $2.91 | −15 % |
Datasheets & documents
- 📄 Pololu QTR Reflectance Sensor Application Note
- 📄 Schematic diagrams of the QTR/QTRX/QTRXL Reflectance Sensor Arrays
- 📄 Dimension diagrams of the QTR/QTRX Reflectance Sensor Arrays
- 📄 3D models (STEP) of the QTR/QTRX Reflectance Sensor Arrays
- 📄 Drill guides (DXF) for the QTR/QTRX Reflectance Sensor Arrays
- 📄 Arduino library for the Pololu QTR Reflectance Sensors
Specifications (automatically extracted)
Electrical
| Current | 2 A |
| Voltage max. | 5.5 V |
| Voltage min. | 2.9 V |
Mechanical
| Weight | 0.7 g |
Other characteristics
| Led current | 30 mA |
| Maximum current draw | 32 mA |
| Maximum range | 30 mm |
| Optimal range | 5 mm |
| Peak wavelength | 940 nm |
| Sensor count | 2 |
| Sensor pitch | 8 mm |
| Other pcb markings | 0J11359 |
| Output type | A (analog voltages) |
| Pcb dev codes | irs23a |
| Sensor type | QTR |
| Size | 13.0 × 20.0 × 2.5 mm |
Description
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 the traditional-style QTR sensors without lenses.
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