TCO-3040A rectangular inductive proximity sensor
Technical Specifications

• Detecting Distance (Sensing Range): 40 mm (with a set distance of roughly 0–36 mm)
• Working / Supply Voltage: 6–36V DC (commonly operated on 12V or 24V DC systems) 
• Current Output: 300 mA (max switching current) 
• Output Type: NPN, Normally Open (NO), 3-wire configuration
• Mounting / Hole Diameter: 30 mm 
• Housing Material: ABS / plastic-metal composite 
• Protection Rating: IP67 (dust and water resistant) 
• Key Features: Built-in power supply reverse-connection protection and short-circuit protection; can interface directly with Programmable Logic Controllers (PLCs). 

You can view purchasing availability and specs via the  or alternative vendor specs on If you need help with this sensor, let me know:

• What voltage or PLC you are connecting it to
• Whether you need help with pinout / wiring diagrams (Brown, Blue, Black wires)
• If you are looking for a PNP variant instead of NPN