Kingbright KTIR0821DS Photointerrupter

Kingbright Sub-miniature Photoreflective Sensors - Kingbright KTIR0821DS, Compact, thin 1.2V photo reflective sensor from Kingbright with Darlington transistor output. Kingbright KTIR0821DS Photointerrupter

Price: £ 0.57 from Rapid Online Rapid Electronics Ltd.