Steve
Senior Member
Again, it really depends on your exact situation. Neither one is going to affect your electric bill as they are powered from your panel and use minute amounts of current. I'm going to assume protecting a sliding glass door as you stated. So, there are 4 possible ways to fully protect an area with a sliding glass door. You can use any one of them or any combination depending on how thorough you want to be. They are:
1. Standard contact switch to detect opening and closing (much like a window).
2. The 5150 or equivalent on a FIXED pane of glass. This is only an option if you have one fixed pane and one moveable pane.
3. Audio glass break detector
4. Backup motion detector
There are several ways a sliding door is violated...
1. Lock broken and door is slid open. Option 1 above will detect this and also you can use the simple and effective broomstick/dowel/etc in the track to prevent door from sliding (a recommended option on a door not used often)
2. Door lifted out of the track. Again Option 1 will detect this. Option 2 MAY detect it if the fixed side is jarred enough in the process.
3. Brick or other object thrown through the door breaking the glass. Option 1 is worthless on this. Option 2 will catch it on the fixed pane and POSSIBLY on the sliding pane IF the frame on the sliding pane jars the fixed pane enough. Option 3 should also detect this on either pane but if the door glass is laminated sometimes the detectors don't pick it up (although if it is close enough it still should)
Option 4 is a great backup in case any of the above fail. In my home I have options 1, 3 and 4 but I don't have fixed panes, both sides slide. I do use the 5150's on the upper fixed panes of windows however. I like the Sentrol 5820 for normal glass break detection but there are several good kinds and depends on your location, aesthetics, etc.
Any one of the options will connect to a zone and assuming you home run each contact/sensor you will know exactly what went off. The 5150 and standard contacts only need the 2 wires as they are powered by the zone, only the audio glass break (and possible PIR would need 4 wires/separate power).
As for door contacts again it depends what you want/need. But I always try to use the recessed contacts where possible. Other options are mini surface contacts or ones like jamb mounted 'buttons'.
Hope that helps.
1. Standard contact switch to detect opening and closing (much like a window).
2. The 5150 or equivalent on a FIXED pane of glass. This is only an option if you have one fixed pane and one moveable pane.
3. Audio glass break detector
4. Backup motion detector
There are several ways a sliding door is violated...
1. Lock broken and door is slid open. Option 1 above will detect this and also you can use the simple and effective broomstick/dowel/etc in the track to prevent door from sliding (a recommended option on a door not used often)
2. Door lifted out of the track. Again Option 1 will detect this. Option 2 MAY detect it if the fixed side is jarred enough in the process.
3. Brick or other object thrown through the door breaking the glass. Option 1 is worthless on this. Option 2 will catch it on the fixed pane and POSSIBLY on the sliding pane IF the frame on the sliding pane jars the fixed pane enough. Option 3 should also detect this on either pane but if the door glass is laminated sometimes the detectors don't pick it up (although if it is close enough it still should)
Option 4 is a great backup in case any of the above fail. In my home I have options 1, 3 and 4 but I don't have fixed panes, both sides slide. I do use the 5150's on the upper fixed panes of windows however. I like the Sentrol 5820 for normal glass break detection but there are several good kinds and depends on your location, aesthetics, etc.
Any one of the options will connect to a zone and assuming you home run each contact/sensor you will know exactly what went off. The 5150 and standard contacts only need the 2 wires as they are powered by the zone, only the audio glass break (and possible PIR would need 4 wires/separate power).
As for door contacts again it depends what you want/need. But I always try to use the recessed contacts where possible. Other options are mini surface contacts or ones like jamb mounted 'buttons'.
Hope that helps.