PololuPololu· Sensors

QTR-MD-02A Reflectance Sensor Array: 2-Channel, 8mm Pitch, Analog Output

Name: QTR-MD-02A Reflectance Sensor Array: 2-Channel, 8mm Pitch, Analog Output
Brand: Pololu
Price: 3.44 USD
Availability: InStock

Manufacturer part no. 4242

$3.44≈ 3.03 €

Price summary

Listed by Pololu at €3.03. Delivered to France, including shipping, VAT and any customs duty, it comes to about €33.64. Prices last checked on 2026-09-30.

Delivered cost is an estimate for a single item shipped to mainland France; the seller's checkout is authoritative.

In stock — 122 units

origin USA
RoHS3

View at seller ↗

Estimated landed cost

Landed cost breakdown
Item	€3.03
Shipping	€25.00
VAT (20%)	€5.61
Total delivered	€33.64

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

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

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.