GX-5SU Panasonic sensor
Key Specifications

• Sensor Type: Inductive proximity
• Sensing Distance: 1.2 mm stable range (1.5 mm max)
• Diameter/Size: 5.4 mm smooth outer diameter head
• Operating Voltage: 10 to 30 VDC (2-wire)
• Output Type: NPN-NO (Normally Open)
• Response Frequency: 1.75 kHz
• Enclosure/Housing: Stainless steel (SUS303) body with a nylon or polyarylate sensing face
• Environmental Rating: IP67 dust and water protection
• Status: Discontinued by Panasonic in September 2022 

You can check distributor inventory or alternative options directly on the If you want, let me know:

• What application or machine you are repairing
• Whether you need a direct functional replacement for this discontinued model

I can help you find a suitable modern alternative.