Ya, what is photobeam sensor btw?

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a long sensor about 2.5 feets long and 1 inch width, will trigger the security system if there is any big object tresspass the signal. Its something like a invisible barrier sensor.

Tohsan, can you upload some pics?? hard to imagine what you mention here. Thanks

http://www.seco-larm.com/E-964-QxxxQ.htm

tohsan, since this thing is up in the roof and we seldom go up, how would we know if the devise is still in working condition after some time?

tq.

my alarm security company technician will come to my house for check & maintenance of all the sensors every 6 months or as per request for a small fee.