PololuPololu· Sensors

QTR-HD-04A Reflectance Sensor Array: 4-Channel, 4mm Pitch, Analog Output

Name: QTR-HD-04A Reflectance Sensor Array: 4-Channel, 4mm Pitch, Analog Output
Brand: Pololu
Price: 4.97 USD
Availability: InStock

Manufacturer part no. 4204

$4.97≈ 4.38 €

Price summary

Listed by Pololu at €4.38. Delivered to France, including shipping, VAT and any customs duty, it comes to about €35.26. Prices last checked on 2026-10-01.

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

In stock — 85 units

origin USA
RoHS3

View at seller ↗

Estimated landed cost

Landed cost breakdown
Item	€4.38
Shipping	€25.00
VAT (20%)	€5.88
Total delivered	€35.26

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	$4.97
≥ 5	$4.57	−8 %
≥ 25	$4.21	−15 %

Datasheets & documents

Specifications (automatically extracted)

Electrical

Current	4 A
Voltage max.	5.5 V
Voltage min.	2.9 V

Mechanical

Weight

1 g

Other characteristics

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	4 mm
Other pcb markings	0J11360
Output type	A (analog voltages)
Pcb dev codes	irs24a

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 40 mm. This version features the traditional-style QTR sensors without lenses.