Item is new, never used factory surplus.

Following details from Danaher Motion 

Posit ion Sensor Specifications for Sensors used on EC, N2, and NV Series Electric Cylinders
Sensor Series     PSN-1Q
Sensor Type       Hall-Effect
Output Type        Sinking, Open Collector (NPN)
Connection         Normally Open
LED Color           Green
Number of Leads 3 + shield, 26 AWG, 4-meter cable
Supply
Voltage                10 - 24 VDC
Current                5 mA @ 12 VDC; 10 mA @ 24 VDC
Power                  0.24 W
Leakage Current (max.) 0.01 mA
Output
DC Maximum       24 VDC
Current Max.        100 mA
Power Max.          3 W
Operating Temp.   -4° to 158°F [-20° to 70°C]
Storage Temp.      -4° to 176°F [-20° to 80°C]
Environmental Rating IEC Standard IP67

If You Ordered:     PSN-1Q
You Should Have Received:  Sensor with 4m quick-disconnect cable

PSN (Hall-Effect Switches)
• Higher tolerance to vibration
• Greater durability and reliability
• Requires external DC power (readily available from IDC Controls)
• Best used for long cable lengths (greater than 9 meters)