a few alarm questions

[sellers]

when adding a sensor can it be just added onto an existing sensor or does it need to come straight from the pannel?

I recently disconnected and re-connected something on an alarm system, it looked like a bigger door sensor but it was just a small white block on the roof of a bathroom? aparantly the customer said it was installed and would go off if the windows were smashed? Is it some kind of shock sensor?

Whats the best sensor to protect a large roller shutter door?

Thanks

 

[Andy™]

best take it back to panel on its own zone

you can get metallic door contacts for roller shutters

 

[green-hornet]

[quote name='Andy

 

[Lurch]

when adding a sensor can it be just added onto an existing sensor or does it need to come straight from the pannel?

You can extend an existing circuit but then you have no idea what device caused the alarm or fault at a later date so ideally wire everything as a device per zone.

I recently disconnected and re-connected something on an alarm system, it looked like a bigger door sensor but it was just a small white block on the roof of a bathroom? aparantly the customer said it was installed and would go off if the windows were smashed? Is it some kind of shock sensor?

Sounds like a shock sensor. Could have been a glass break detector but these are generally a bit larger than a JB.

Whats the best sensor to protect a large roller shutter door?

With roller shutter contacts I'd imagine. If it's a wide door install one at each end otherwise the door can be lifted one end and access gained without it triggering the contact.

you can also get some contacts wired into the roller mechanism for when the door is activated

Not much use when they just reverse a truck through the shutter.

 

[binky]

I recently disconnected and re-connected something on an alarm system, it looked like a bigger door sensor but it was just a small white block on the roof of a bathroom? aparantly the customer said it was installed and would go off if the windows were smashed? Is it some kind of shock sensor?

Never heard of a shock sensor that would work remote from the window itself. Might work if someone broke the window with a bus :^O

 

[Andy™]

Never heard of a shock sensor that would work remote from the window itself. Might work if someone broke the window with a bus :^O

ultrasonic? it would detect a broken window

 

[Lurch]

Never heard of a shock sensor that would work remote from the window itself. Might work if someone broke the window with a bus :^O

They've been about for years, I've fitted loads. You are thinking of vibration\inertia\shock sensors rather than ultrasonic glass break detectors.

First random result from Google;

http://www.tycosafetyproducts-europe.com/English/Products/Intruder/detectorbreakglass/detectorbreakglassge.asp