I have a scantronic 9800 I had this installed years and years ago I believe its time the batteries were replaced in both the panel and bell box I have already purchased the batteries but just need a bit of help on how to do this my bell box is also a ventcroft classic also im looking at changing the pir's in here what pirs do you men recommend
can't give you exact info with the bellbox for obvious reasons as I am sure you understand. just get some ear defenders and get on with it but be careful. the strobe can give you a right belt especially on a ladder.
as for the pirs I would go with aritech ev125p's if you can get them of course. they are not best looking but they are definnately one of the best. failing that go for the pyronix.
We may have found other answers which could help you.