Pololu
QTRX-MD-04A Reflectance Sensor Array: 4-Channel, 8mm Pitch, Analog Output, Low Current
£2.00£4.99Unit price /UnavailableSeeed Studio
Grove - Light & Gesture & Colour & Proximity Sensor (TMG39931)
£6.43£16.08Unit price /UnavailablePololu
QTRX-HD-07RC Reflectance Sensor Array: 7-Channel, 4mm Pitch, RC Output, Low Current
£3.20£7.99Unit price /UnavailableSeeed Studio
Pyscan - A Sensor Shield for Pycom Development Boards
£21.48£53.70Unit price /Unavailable