PololuPololu· Sensors

QTR-MD-01A-S Reflectance Sensor: 1-Channel, 8mm Wide, Analog Output, Side-Entry Connector

Name: QTR-MD-01A-S Reflectance Sensor: 1-Channel, 8mm Wide, Analog Output, Side-Entry Connector
Brand: Pololu
Price: 3.95 USD
Availability: InStock

Manufacturer part no. 4240

$3.95≈ 3.50 €

Price summary

Listed by Pololu at €3.50. Delivered to France, including shipping, VAT and any customs duty, it comes to about €34.20. 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.

In stock — 441 units

origin USA
RoHS3

View at seller ↗

Estimated landed cost

Landed cost breakdown
Item	€3.50
Shipping	€25.00
VAT (20%)	€5.70
Total delivered	€34.20

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	$3.95
≥ 5	$3.63	−8 %
≥ 25	$3.34	−15 %
≥ 100	$3.08	−22 %

Datasheets & documents

Specifications (automatically extracted)

Electrical

Current	1 A
Voltage max.	5.5 V
Voltage min.	2.9 V

Mechanical

Weight

0.4 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	1
Connector	side-entry, 4-pin JST SH-type
Other pcb markings	0J15852
Output type	A (analog voltages)
Pcb dev codes	irs21c

Description

This sensor uses an IR LED and a phototransistor to measure the light reflected from nearby surfaces. It operates from 2.9–5.5 V, with dimmable brightness control independent of the supply voltage. The optimal range is <5 mm, but it can detect high-reflectance objects out to around 30 mm. This version features a traditional-style QTR sensor without lenses and a connector that works with our 4-pin JST SH-style cables (compatible with SparkFun’s Qwiic and Adafruit’s STEMMA QT cables, but the interface is not I²C).