Thanks for the reply.
I have looked for the Optex variants but have drawn a blank for the criteria I am looking for could you possible advise of a specific part number or range please.
I cannot find any UL approved takex types.
Appreciate your help with this.
No other than the spec in the original query above, i.e) floor area (6m x 4m), elevation (2.5 - 3m), single volt free contact switching on motion detection, adjustment in 2 planes, 24Vdc operation preferred, 24Vdc switching on the contact, UL approval.