The item available here is a new old stock Namco Controls proximity sensor.  This comes as shown in new condition in the original packaging.  There are FOUR initially available (see last picture).

  It has not been tested and comes with a 30 day return policy from the date the item was shipped, EXCEPT INTERNATIONAL SHIPPING.   Postage is not covered.

Here's the specs:

Part No: EE560-83401

Items will be paid for immediately and will be shipped using USPS.  Most orders over $300 will require signature confirmation at no extra cost to the purchaser.