PololuPololu· Electronics
QTR-MD-01A-S Reflectance Sensor: 1-Channel, 8mm Wide, Analog Output, Side-Entry Connector
Manufacturer part no. 4240
$3.95≈ 3.43 €
In stock — 453 units
- origin USA
- RoHS3
Estimated landed cost
| Item | €3.43 |
|---|---|
| Shipping | €25.00 |
| VAT (20%) | €5.69 |
| Total delivered | €34.12 |
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
- 📄 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 | 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).
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