SN04-N 4mm Proximity Sensor NPN NO 10-30VDC 300mA 3-wire Inductive
Price in Sri Lanka

The SN04-N 4mm Proximity Sensor is a compact inductive sensor designed for reliable non-contact detection of metallic objects. With a 4 mm sensing distance, NPN normally-open output, and wide 10–30 VDC operating range, this sensor is ideal for automation, robotics, industrial control systems, and electronic projects requiring object presence detection.

Features

• Inductive (metal detecting) proximity sensor
• 4 mm sensing distance (typical)
• NPN Normally Open (NO) output
• 3-wire configuration: Brown (V+), Blue (GND), Black (Output)
• Wide voltage range: 10–30 VDC
• Output current up to 300 mA
• Fast response time
• LED indicator for detection status
• Rugged metal/housing protection
• Compact design for easy mounting
• Ideal for automation & motion control

Specifications

• Model: SN04-N
• Sensing Type: Inductive (detects metal objects)
• Sensing Distance: 4 mm (flush mount)
• Output Type: NPN, Normally Open (NO)
• Number of Wires: 3
• Operating Voltage: 10 – 30 VDC
• Max Load Current: 300 mA
• Response Frequency: Typically 1 kHz
• Protection: Short-circuit and reverse polarity (varies by model)
• Indicator: Built-in LED detection indicator
• Operating Temperature: –25 °C to +70 °C (common range)

Applications

• Object detection in automation systems
• Robotic position sensing
• Conveyor and material handling systems
• Manufacturing and assembly machines
• End-of-travel detection
• Proximity switch replacement in control panels
• DIY robotics and electronic projects