LJ18A38Z/AY Inductive Proximity Sensor Switch 3wire DC 636V PNP NC Key benefits Reliable noncontact detection of metal targets for longer service life and reduced mechanical wear. Simple integration into DC control systems thanks to a wide supply range of 6 to 36 volts and a standard 3wire connection. Compact threaded body for easy mounting and repeatable positioning in machinery and fixtures. PNP normallyclosed output provides a predictable switching logic option for control and safety circuits. What it does and why you need it Detects the presence or absence of metallic objects without physical contact, improving uptime and reducing maintenance compared to mechanical switches. Works with common DC control equipment and PLC inputs that accept PNP type signals. The normallyclosed output configuration helps maintain a defined circuit state when no target is present, useful in systems requiring failsafe or continuous monitoring behavior. Important attributes Model: LJ18A38Z/AY. Function: Inductive proximity sensing for metallic targets; noncontact switch. Electrical: DC supply 6 to 36 volts, 3wire wiring, PNP output, normallyclosed operation. Form factor: Cylindrical threaded sensing body suitable for panel or bracket mounting. Durability: Designed for industrial applications where repeated, reliable switching is required. How it stands out Broad voltage compatibility fits many DC control environments without additional converters. Standard 3wire PNP NC configuration makes it straightforward to or add to existing sensing points. Threaded housing supports secure, repeatable installation and alignment. Typical applications Conveyor systems: detect passing metal parts for counting, sorting, or triggering downstream equipment. Automated assembly: confirm part presence or correct positioning on fixtures and feeders. Machine tooling and robotics: provide position feedback or endoftravel detection for metal components. Installation tips Mount so the target enters the sensor face within the recommended sensing range for reliable switching. Use the threaded body and locknut for secure placement and repeatable alignment. Observe correct wiring for 3wire PNP NC sensors to match the control input logic of your system. This LJ18A38Z/AY inductive proximity sensor is suited for industrial and automation tasks where noncontact, reliable metal detection is required and where a PNP normallyclosed output is preferred for control logic.