PololuPololu· Sensors
QTR-MD-04A Reflectance Sensor Array: 4-Channel, 8mm Pitch, Analog Output
Manufacturer part no. 4244
$5.26≈ 4.66 €
Manufacturer part no. 4244
Listed by Pololu at €4.66. Delivered to France, including shipping, VAT and any customs duty, it comes to about €35.59. Prices last checked on 2026-10-02.
Delivered cost is an estimate for a single item shipped to mainland France; the seller's checkout is authoritative.
| Item | €4.66 |
|---|---|
| Shipping | €25.00 |
| VAT (20%) | €5.93 |
| Total delivered | €35.59 |
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.
| Qty | Unit price | Saving |
|---|---|---|
| ≥ 1 | $5.26 | |
| ≥ 5 | $4.84 | −8 % |
| ≥ 25 | $4.45 | −15 % |
| Current | 4 A |
| Voltage max. | 5.5 V |
| Voltage min. | 2.9 V |
| Weight | 1.5 g |
| Led current | 30 mA |
| Maximum current draw | 62 mA |
| Maximum range | 40 mm |
| Optimal range | 5 mm |
| Peak wavelength | 940 nm |
| Sensor count | 4 |
| Sensor pitch | 8 mm |
| Other pcb markings | 0J11363 |
| Output type | A (analog voltages) |
| Pcb dev codes | irs27a |
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 40 mm. This version features the traditional-style QTR sensors without lenses.
Semantically close products available for less — check the specs match your need.
| Sensor type | QTR |
| Size | 29.0 × 20.0 × 2.5 mm |
