The PR124DN and PR124DO are compact round proximity sensor switches that operate on DC power and use a 3wire output. They provide noncontact metal detection for reliable position sensing in automation equipment. The two variants offer different switching configurations to fit your circuit logic, while sharing the same compact round form and DC operation. Key benefits Wear sensing: detects metal targets without physical contact, reducing mechanical wear and maintenance. Compact round design: small footprint that fits tight installation spaces on machines, conveyors, and control panels. Simple wiring: 3wire DC connection simplifies installation and integration with typical control systems. Flexible switching options: PR124DN and PR124DO variants accommodate different switching needs in your circuitry. Reliable performance: designed for dependable operation in industrial environments with steady switching in response to target presence. Key attributes Functionality: round proximity sensor switch for noncontact metal detection. Configuration: 3wire DC output for straightforward connection to control inputs. Variants: PR124DN and PR124DO, offering different switching configurations. Size: round housing in the PR12 family, suitable for compact mounting (12 mm class size implied by model name). Material: housing material not specified in the listing. Performance: provides switching behavior when a metal target is within sensing range, intended for continuous operation. Compatibility: intended for DC control circuits and automation controllers that accept 3wire proximity inputs. Packaging: sold as 1 piece per (1 Pcs PR124DO listed). Applications and use cases Endofline or endoftravel sensing on conveyors to trigger stops, starts, or diverters. Position sensing on machine tools, clamps, or actuators where noncontact detection improves reliability and reduces wear. Safety interlock or door/cover detection in panels and enclosures, enabling safe control logic without mechanical switches. General metal target detection in automation systems where a compact round sensor is advantageous. Mounting and integration notes Designed for DC operation with a 3wire connection; ensure proper wiring to your control module. Select PR124DN or PR124DO based on whether NO or NC style switching fits your logic (as available in the DN/DO variants). Verify mechanical fit and clearance for the round housing in your mounting area and ensure compatibility with your control system's input expectations. This description reflects the product's brand reference, model identifiers, and stated features: round DC 3wire proximity sensor switches with PR124DN and PR124DO variants, offered as single piece units.