Use a proximity sensor switch to signal a machine (i.e. CNC router or laser machine) that it has reached an end or home position. This is an inductive proximity sensor detection switch. - Switch transistor type polarity: PNP, or NPN (depending on purchase option) - Voltage Range: 6VDC to 30VDC - Detection distance from a conductive material: 4mm - Normally Open type switch: Should be connected in Parallel or on a single input - 4mm distance activation

Inductive Proximity Sensor Technical Specification

Basic Operation

• Detects conductive metals (ferrous materials) without physical contact
• Activates when ferrous metal approaches within 4mm of the sensor tip
• Features an LED indicator that illuminates when activated
• Solid-state design eliminates mechanical bounce issues

Electrical Specifications

• Operating voltage: 6-36V DC (optimized for 24V DC industrial systems)
• Configuration: NPN, Normally Open (NO)
• Three-wire connection:
  • Brown wire: Positive (V+)
  • Blue wire: Negative (V-)
  • Black wire: Signal output

Signal Behavior

• Normal state (no metal detected): Black wire outputs ~24V
• Activated state (metal detected): Black wire outputs ~0V
• Detection occurs only at sensor tip, not along sides
• Signal is clean and bounce-free due to solid-state design

Mounting Features

• Threaded cylindrical body for secure mounting
• Includes mounting nuts for position adjustment
• Can be mounted in two configurations:
  • Static sensor with moving metal target
  • Moving sensor with static metal target
• Requires appropriate mounting hole in machinery

Installation Considerations

• Should be protected from metal chips in machining environments
• Compatible with common CNC controllers (e.g., Mach3 USB, Pokeys57CNC)
• Can be used as limit switches in industrial machinery
• Requires proper grounding and common V- connection for multiple sensors

Integration with Mach3 CNC Software

• Connects to controller input terminals (IN1-IN4)
• Requires specific configuration in Mach3 software:
  • Port and pin assignment in "Ports & Pins" settings
  • Axis designation (X++, etc.) based on installation position
  • Can be verified through diagnostics tab