This is a NPN type Inductive Proximity Sensor also called as proxy switch which can be used to detect metal upto 5mm. The distance may vary according to metal size. This is a Square Type low cost water proof and dust proof proximity sensor with LED indicator and easy Mounting.
SN04-N Sensor is very easy to use can be used with PLC for CNC applications.

Sensor Pinouts: 

• Brown: +VDD
• Blue: GND
• Black: Signal

Specification SN04-N Inductive Sensor:

• Output:  NPN NO
• Operating Voltage: 12 to 24 Volt DC
• Current Consumption:  <8mA
• Reverse polarity protection YES
• Output
• Function Normally Open
• Load Current 200 mA max.
• Frequency 600Hz
• Sensing Range
• Rated Distance 5 mm
• Recommended Distance 3.2 mm
• Hysteresis 10% of Sensing Range
• Environment Ratings
• Ambient Temperature -20~+70°C