Compact low cost cadmium sulphide light dependent resistor (LDR) housed in a small package.
Consists of a resistor which is made of semiconductor material whose conductance changes with variations in luminance.
Typical applications include camera automatic photometry, photoelectric control, lighting control, annunciators, industrial control, light control switches and electronic toys.
 
5mm diameter
Clear epoxy finish
Resistance reduces as the light falling on the device increases