The PA18C series of Carlo Gavazzi general purpose reflective sensors includes inexpensive general purpose Diffuse-reflective, Retro-reflective, and Polarized Retro-reflective sensors.

Housed in industrial standard 18mm cylindrical PBTP or nickel-plated brass housings, Carlo Gavazzi general purpose reflective sensors are useful for simple applications where a basic sensor provides adequate sensing performance. Carlo Gavazzi general purpose sensors are simple to use and no adjustments are necessary (except the 400mm diffuse adjustable type). The output is a 4-wire complementary (NO and NC) output in NPN (current sinking) or PNP (current souring) or 2-wire NO or NC thyristor (SCR) output.