The Siemens 3RG7134-0GA00 is a SIMATIC PXO250 M18 diffuse photoelectric sensor with background suppression — a fixed-focus NPN dark-on unit rated for 10-120 mm sensing range, 10-36 V DC supply, and 200 mA output. The 2-meter PUR cable (3x0.34 mm²) and IP67 rating suit it for washdown or oily environments on packaging lines or conveyor stations where reliable object presence detection at a set distance is needed.
The 10-120 mm range is the sensing window for the background-suppression optics — objects beyond 120 mm are ignored, which avoids false triggers from a shiny belt or a machine frame behind the target. The NPN dark-on output means the load (PLC input or relay) is switched when the sensor sees the target (dark condition); if your control system expects a PNP or light-on signal, this part will not work without an interface relay or a logic inversion. Supply is 10-36 V DC, which covers standard 24 V DC panels, and the 200 mA rating drives most small contactors or indicator lamps directly.