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.

Specifications:

• Maximum range: 40 mm
• Optimal range: 5 mm
• Minimum operating voltage: 2.9 V
• Maximum operating voltage: 5.5 V
• LED current: 30 mA
• Peak wavelength: 940 nm
• Maximum current draw: 125 mA
• Sensor type: QTR
• Sensor pitch: 8.0 mm
• Sensor count: 8
• Output type: RC (measurable by digital I/O)
• Size: 61.0 × 20.0 × 2.5 mm
• Weight: 3.1 g

Documents:

• Schematic Diagram
• Dimension diagram
• 3D models
• Drill guides

Package Includes:

• 1 x Pololu 4148 QTR-MD-08RC Reflectance Sensor Array 8-Channel, 8mm Pitch, RC Output