for sale is a Honeywell, request-to-Exit passive Infrared Sensor, No. IS310WH.  The sensor is new and unused and comes in the original box, although the box has been opened, and includes the instruction sheet.  I have several available so if you buy more than one, a discount is applied and shipping is reduced on the additional units.  The sensor(s) will be shipped promptly from Missouri.  Thanks for looking.