CdS Photo Cell


Thread Starter

Zvi Marcus

Seeking mounting package for light dependent resistor to function as a ambient light sensor. We have Calcium Sulphide type photo resistors that change resistance with amount of light that falls on them. Approx. 12k ohm at 0.1 footcandle, up to 250 ohm at 100 footcandle.

We have the developed table and code to read light levels with these resistors using a PLC.

The resistors are about 5mm in diameter and 2mm thick with tinned short wire leads.

Does anyone know of a low cost indoor mounting package for this resistor to enable mounting it on a wall and make neat connection to instrument cable?