The NORPS-12 is a CdS photoconductive cell produced by Advanced Photonix, designed with a spectral response similar to the human eye. Encased in a TO-18 package, it features a moisture-resistant coating and a plastic casing. The sensor has a maximum light resistance of 12.6 kΩ and a dark resistance of 1 MΩ. It can dissipate up to 250 mW at 30°C and is rated for a voltage of 250 V (peak AC or DC). The operating temperature range spans from -60°C to 75°C, with a spectral peak at 550 nm. It is typically used in industrial applications.