ELEGOO Proximity Sensor for Neptune 4 Series

This is the inductive proximity sensor the Neptune 4 uses to map the bed. It senses the metal build surface as the nozzle approaches and reports the gap back to the mainboard, and those readings become the mesh that compensates for an uneven bed. It's the part you replace when first layers start drifting in height across the plate or the printer aborts calibration with a probe error.

Specifications

• Inductive non-contact sensor, three-wire hookup
• Reads the metal bed surface without touching the nozzle down
• Pre-terminated harness — no soldering
• Mounts in the stock position, no mods needed

Compatibility: ELEGOO Neptune 4, Neptune 4 Pro, Neptune 4 Plus and Neptune 4 Max. Third-party sellers list the same part as Neptune 3/4, so check the connector against the listing photos.