The EI1204NPOSS1 is an inductive proximity sensor with a stainless steel M12 housing and NPN NO configuration. It features a short body design with non-flush mounting, 4mm sensing range, and operates at 10-40VDC supply voltage. With a maximum output current of 200mA and switching frequency up to 500Hz, it performs reliably in temperatures ranging from -25°C to +70°C.