SN04-N NPN NO 4mm Distance Detector Proximity Sensor Switch Module

SN04-N NPN NO 4mm Distance Detector Proximity Sensor Switch Module is a widely used industrial-grade proximity sensor that detects the presence of metallic objects within a 4mm sensing range. It operates using NPN Normally Open logic, making it suitable for automation, CNC machines, robotic systems, and object detection tasks.

Key Features:

• Non-contact detection: Uses electromagnetic induction to detect metal objects.
• 4mm sensing range: Accurate detection distance for standard applications.
• NPN NO output: Normally open configuration for versatile control circuits.
• Fast response: Suitable for high-speed detection in automated systems.
• LED indicator: Visual status indication when object is detected.

Technical Specifications:

• Model: SN04-N
• Type: Inductive proximity sensor
• Sensing Distance: 4mm ±10%
• Output Type: NPN Normally Open (NO)
• Output Current: ≤300mA
• Supply Voltage: 6V to 36V DC
• Detection Object: Ferrous metal (best), other metals with reduced distance
• Response Frequency: 500Hz

Mechanical Specifications:

• Shell Material: ABS plastic (epoxy-sealed)
• Protection Level: IP67 (water and dust resistant)
• Indicator: Built-in red LED
• Wire Type: 3-wire (brown, blue, black)

Dimensions:

• Body Size: Approx. 36mm × 18mm × 18mm
• Cable Length: ~1.2 meter
• Mounting Hole Distance: ~20mm center-to-center

Mounting Options:

• Panel or bracket mount: Easy integration into frames or machines
• Horizontal or vertical alignment: Install in flexible orientations

Schematic Diagram, Connection, Wiring and Pinout:

• Brown (VCC): Connect to +6V~36V DC
• Blue (GND): Connect to ground
• Black (Signal): NPN NO output signal to load or microcontroller
• Connection Type: 3-wire output to external controller or relay

Datasheet/User Manual:

• Download SN04-N Sensor Datasheet (PDF)

Applications:

• CNC and 3D Printers: End-stop or position detection
• Automation Systems: Object presence detection in conveyors
• Robotics: Edge or metal part detection
• Factory Equipment: Feedback sensor for linear motion
• DIY Projects: Home automation, gate sensing

Equivalent:

• LJ12A3-4-Z/BX: Similar NPN NO proximity sensor with cylindrical body
• TL-W5MC1: Omron-style flat proximity sensor
• SN04-P: PNP variant for sourcing output circuits

Package Includes:

• 1 x SN04-N Proximity Sensor Switch Module