NF500A IFM Sensor
Key Specifications

• Brand/Model: ifm electronic NF500A (IFB2007-N/US/1G/1D)
• Sensing Range: 7 mm (non-flush)
• Dimensions: M12 x 1 thread size, 50 mm length
• Housing Material: Threaded brass with special coating / metal housing
• Electrical Design: NAMUR, normally closed (NC) output
• Switching Frequency: 700 Hz
• Protection Rating: IP67
• Temperature Range: -20°C to 70°C
• Certifications: ATEX and IECEx approved for hazardous areas (Zone 0/20) 

If you want to proceed, please tell me:

• What kind of hazardous zone or environment are you installing this in?
• Do you need help finding a compatible switching amplifier or connection cable?