Shock Sensor location?

[Guest murphaph]

Hi all,

I'm currently installing an Aritech CD72 panel at home. I have 2 x GS620 self contained shock sensors to integrate into the system. I'll have contacts on every door & window opening. House is double glazed throughout (fairly sturdy windows and doors). I'm thinking a shock sensor on the front and back doors. What do you experts reckon?

[Mister_Dave]

If your allready planning using contacts shock sensors are a bit ott. You would probably be better putting well set up shocks on the windows instead of contacts.

[Guest IM_Alarms]

try to think about how you would force your way in if you were locked out and there was no choice, side windows? back patio? upstairs window flom flat roof etc.

[Guest murphaph]

lads. I already have the contacts and the 2 x shock sensors in my possesion since way back. I may as well get them up or else they'll just go missing. I'd go through the front door (kicking it in) as it's the only place to gain access without breaking glass, but a thief might not care so much. My front door is actually at the side of the house and not clearly visible from the street. I'll put one there. Probably the back door (has a double glazed panel and is the least visible area of the back of the house).

[dpaengineer]

Is it just me, or did u mention putting shock sensors on your doors....

BAD IDEA - Will set off alarm whenever anybody knocks on your door.

Also a bad idea to put on windows near door if people are likely to knock on those (instead of door (it happens)).

IMO mag contacts on double glazing windows are pointless. by the time they get the window open they will have had to break the glass and open from inside by which time a cleverly placed PIR should have picked them up. Also as previously said, shocks are better on windows if placed correctly.

Just my opinion.

[Guest]

Is it just me, or did u mention putting shock sensors on your doors....

BAD IDEA - Will set off alarm whenever anybody knocks on your door.

Also a bad idea to put on windows near door if people are likely to knock on those (instead of door (it happens)).

IMO mag contacts on double glazing windows are pointless. by the time they get the window open they will have had to break the glass and open from inside by which time a cleverly placed PIR should have picked them up. Also as previously said, shocks are better on windows if placed correctly.

Just my opinion. 

50882[/snapback]

Not so sure on that, the aftermath of breakins I have seen have been the UPVC window forced open even when in the locked position - they dont tend to break the glass - too noisy!

Shocks dont pick up too well on UPVC window or door frames - so actually contacts AND a PIR in that room is prob the best way to do it.

Im not saying dont use shocks, but just be aware that vibrations arnt transmitted through a UPVC frame anywhere near as well as a solid wood frame.

[Guest murphaph]

Not so sure on that, the aftermath of breakins I have seen have been the UPVC window forced open even when in the locked position - they dont tend to break the glass - too noisy!

Shocks dont pick up too well on UPVC window or door frames - so actually contacts AND a PIR in that room is prob the best way to do it.

Im not saying dont use shocks, but just be aware that vibrations arnt transmitted through a UPVC frame anywhere near as well as a solid wood frame.

50887[/snapback]

I'm using contacts all round the house (they're hardly a bank-breaker and useful if someone left a window pushed closed but not actually closed bedore arming the system IMHO. I also have PIRs in the downstairs hall, lounge and Kitchen. The shock on the front door will be fitted to a wooden frame. The back door is uPVC so it has to go there I'm afraid. I heard the door lintel was actually better than the frame, any thoughts?

[dpaengineer]

...but just be aware that vibrations arnt transmitted through a UPVC frame anywhere near as well as a solid wood frame.

50887[/snapback]

I'll go u on that 1

But...

I'm using contacts all round the house (they're hardly a bank-breaker and useful if someone left a window pushed closed but not actually closed bedore arming the system IMHO. I also have PIRs in the downstairs hall, lounge and Kitchen. The shock on the front door will be fitted to a wooden frame. The back door is uPVC so it has to go there I'm afraid. I heard the door lintel was actually better than the frame, any thoughts?

50931[/snapback]

I'd still say dont put shock sensors on doors. Also, what will you do if someone wants to open a window at night when it get hot, HoT, HOT. Or will the U/S contacts be off on part set??

[Guest]

I'm using contacts all round the house (they're hardly a bank-breaker and useful if someone left a window pushed closed but not actually closed bedore arming the system IMHO. I also have PIRs in the downstairs hall, lounge and Kitchen. The shock on the front door will be fitted to a wooden frame. The back door is uPVC so it has to go there I'm afraid. I heard the door lintel was actually better than the frame, any thoughts?

50931[/snapback]

Re-read my post! Im agreeing with you on the contacts!

BUT - back them up with PIRs also, contacts on their own are not the way to go, but are used more of a first line of defence.

[Guest murphaph]

Re-read my post! Im agreeing with you on the contacts!

BUT - back them up with PIRs also, contacts on their own are not the way to go, but are used more of a first line of defence.

50942[/snapback]

Sorry DNS. I know you were agreeing with me....it must be my poor internet tone! I'm going to do as you suggested; contacts all round backed up by PIRs on the ground floor. I will be able to allow part set or whatever-the panel is fairly programmable for all circumstances, it's an Aritech CD72. Seems like we have some disagreement over the shock sensors. I was going to program the front door to alarm on gross attack only-to avoid poor Jehovah's Witnesses setting it off while trying to convert me. The back door I can set to trigger on pulse count and gross attack. I have the capability (24 zone panel) to allow the shock sensors to be on their own zone (I thought this a wise move given that they can fail more readily than a reed switch and I'd like to be able to omit them without dropping defences on the whole door). Thoughts?

Thanks for all your input so far guys. It helps to have an objective voice to listen to.