Vibration Sensor

[Pensdown]

We're just about to build a new secure wall around a comms room that keeps getting broken into. The customer has requested vibration sensors in the wall and door frame wired back to a stand alone local alarm that will be armed 24/7 This may be linked to the main building alarm at some stage.

I've only every used the RS shockgard - 493-0999 vibration sensors which can be a bit temperamental.

I'm sure there must be better ones on the market, any suggestions?

Thanks in advance

Andy

 

[breezer]

I will see if i can find one and post more info. how ever i should like to point out the following:

1) being on a perimiter is a good idea - or is it?

not sensative enough never goes off, too sensative and kid playing football aginst wall, off it goes

2) If some one does inadvertantly hit the wall and set them off, how do you know?

all you know is your alarm went off, you cant prove anyhting

3) where do you put them?

too low and any heavy object hitting wall will set them off

too high may miss actual break in

4) never put them on a glass window frame

the glass will act as an amplifier and the right frquncey will cause them to go off.

5) NEVER use inertias

I have 2 suggestions

1) Mount an independant panel (say timber) inside the wall with one sensor on each panel, if some one does get in they hit panel and off it goes (never tried this)


2) mount on wall put on hit count 2 or 3, someone getting in through a wall short of explosives is going to have to hit the wall more than once, quantity will dependon density of wall itself

 

[RF Lighting]

We fit viper GLX shock sensors. I have a few at home and have not had any trouble at all with them.

Clicky

I don't know how reputable the website is.
Just the first link on google

 

[luminaire]

I'm sure there must be better ones on the market, any suggestions?

Thanks in advance

Andy[/quote]

Try these, they are usually very reliable
http://www.texe.com/view.php?page=25

 

[Pensdown]

Thanks for that, recommendation is always better than suck-it-and-see

breezer, just to confirm, the comms room is within an office building and the risk (due to a very badly located comms room) is smash and grab during office hours. The last time two guys walked out with 200K's worth of network cards in less than 4mins and the client only knew something was wrong when the network went down.

The CCTV was great and caught all of the action. Trouble was the thieves were camera shy and dressed for the occasion

 

[plugwash]

what exactly are they smashing? windows? walls? doors? wouldn't a simple security door and no windows solve the problem?

 

[luminaire]

The last time two guys walked out with 200K's worth of network cards in less than 4mins and the client only knew something was wrong when the network went down.

You can also try something known as a 'Smoke Cloak'. As the name suggests this fills the room with smoke in seconds, and then they're glad just to find their way out empty-handed!
Believe me it is very effective.

 

[Pensdown]

wouldn't a simple security door and no windows solve the problem?

That's the purpose of the class 1a composite secure wall which will include a steel door and frame. The existing walls are stud partitions with full height glass in every other panel. I think this stems from the days when people used to show off their servers.

After the first break in mesh was fitted over the windows. The second time they smashed a hole through the stud wall and the third time they just pushed the door frame out.

Anyway, thanks again for you help, I've just ordered a sample of both types of sensor.

 

[RF Lighting]

Let us know your findings. I've looked at the Texecom ones, and they look ok, but I've never fitted them, so I'd be intrested to see how you rate them.