Some photoelectric sensor pairs of two types;

A set of 6 photoelectric sensor pairs mounted on 3 pole pairs. These came out of a machine but all I know is that the transmitter is an IR LED (Yel & Blk wires) and have tested them with a phone camera to show up the IR. Both the emitter and the sensor have lenses but I don't know the distance spec, and most of the sensors have a slit to restrict the ambient light input (I assume). One pole on the 2-up has the mounting thread broken off.

White ones - a pile of mainly sensors (only 3 transmitters - on pole) with LED to indicate beam broken. These can be daisy-chained.

That's all I know. Good for experimentation. 1kg in padded bag

Will ship in $6.50 Postshop bag or pickup from Hilling St, Titirangi.