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 40mm.

Specifications:

• Dimensions: 29.0 20.0 2.5 mm
• Operating voltage: 2.9 V to 5.5 V
• Sensor type: QTR
• Sensor count: 4
• Sensor pitch: 8 mm
• Full-brightness LED current: 30 mA (independent of supply voltage)
• Max board current: 62 mA
• Output format: digital I/O-compatible signals that can be read in parallel as timed high pulses
• Optimal sensing distance: 5 mm
• Maximum recommended sensing distance: 40 mm
• Weight: 1.5 g