magnets

[Spencer]

where can I find the adapters to make a
window sensor work on two windows at one?

[Kishore]

You can connect two magnet switches in
series an place each of them for the two
windows.

[grumpyoldman1948]

Radio shack carries X-10 products (albeit at
a much higher price than this web-site).
They carry the reed switch/magnet pairs that
you need.

[bill salisbury]

Spencer:
If you are still interested, You can buy the
Alarm Switches at www.allelectronics.com

They have SPDT switches that will work as
Normally Open or Normally Closed.

CAT# MS-7  $3.50 each

Bill S