Item is new, never used factory surplus.

Following details from Danaher Motion 

Position Sensor Specifications for Sensors used on EC, N2, and NV Series Electric Cylinders

Sensor Series        PSR-1
Sensor Type          Mechanical Reed
Output Type           Contact Closure
Connection            Norm. Open
LED Color              Green Red Green Red Yellow Red
Number of Leads   2 + shield, 26 AWG
Supply Voltage       4 - 120 V (AC or DC) 
Output
  DC Maximum       120 VDC
  AC Maximum       120 VAC
  Current Max.        50 mA
Power Max.            6 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: PSR-1
You Should Have Received:  Sensor with 3m flying-lead cable
 
PSR (Reed Switch)
• More noise immunity (EMI)
• Does not require a power supply
• Slightly lower cost
• Does not work with inductive loads
• Switches AC voltages
• Can be used with Sinking or Sourcing Inputs