You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser.
-
http://www.austlii.edu.au/au/legis/nsw/consol_act/epaaa1979389/s146a.html
-
From what I have seen they use a spray can which must contain so sort of 'smoke' which they spray in the vicinity of the alarm and see if it responds.
-
For $75 per year is it worth driving out to your property to check?