the recommenced minimum height is 3m ?
having to stand on a leaded bay was not uncommon
however-
working on this can't ready be done safety off a ladder?
an unsed TS700 with mains on the pcb, vintage....
@logan was you after this sort of tat https://www.ebay.co.uk/itm/Burgalr-Alarm-PIR-Sensors/283617313078?hash=item4208e8c136:g:-JcAAOSwP-pdgQ8M
or was it the earlier ones
the rep showed me the plastic cased ion & a dongle,
I knew where they got the dongles form them from & asked why I should buy there's,
they run really hot at 12v & they where concerned at the fire risk (IIRC)
the 9800 was in the market place in the late 1980's.... rkp, digi footprint, priner outputs...
30 odd years later-
this sort of tat still selling well.