Wireless Door Lock Sensor

Wireless Door Lock Sensor
Secure Home | Search | About
Login Password
Register Now! Lost Password?
 CCTV, Alarms and other Physical Security    Post an article   get this group's latest topics as an RSS feed add this group's latest topics to your My MSN content add this group's latest topics to your My Yahoo content add this group's latest topics to your Google content
Subject Author Date
Wireless Door Lock Sensor Tom 10-24-2005
Posted by Tom on October 24, 2005, 8:49 pm
If you were  Registered and logged in, you could reply and use other advanced thread options
I would like to install door lock sensors on an existing Ademco alarm.
Ideally I would like to use wireless sensors such I do not have to run
additional wires.

Is there any readily available door lock sensor that can be added to an
existing installation? (preferable wireless)?

I searched but actually hardly found any info on such sensors. I would
have though that should have been actually a standard part of any alarm
to confirm that all doors are locked (and not only closed) before
arming.
Any insight why this is not considered standard or important? What is
the point of arming the alarm and leaving the back door unlocked?

Of course I had a alarm salesman in the house right after I bought it
and asked him about door lock sensors and I got a more then
disappointing answer (same for asking for some form of protection if
the phone line is cut). It seems you can get much out of the sales
people such I decided I would rather build the alarm myself.

Tom



Posted by Crash Gordon on October 24, 2005, 9:11 pm
If you were  Registered and logged in, you could reply and use other advanced thread options
For standard door locks you'd probably have to build something yourself
using microswitches where the bolt goes into the door jam...tedious but it
can be done. Then you could bury a wireless transmitter in the wall.

It's not a standard thing. I've only done a few like this, most people don't
want to pay..and if you don't do it correctly it can be really prone to
false alarms.

Phone line cut protection should be part of any sales spiel...it's important
to bring it up even if the potential buyer refuses.



|I would like to install door lock sensors on an existing Ademco alarm.
| Ideally I would like to use wireless sensors such I do not have to run
| additional wires.
|
| Is there any readily available door lock sensor that can be added to an
| existing installation? (preferable wireless)?
|
| I searched but actually hardly found any info on such sensors. I would
| have though that should have been actually a standard part of any alarm
| to confirm that all doors are locked (and not only closed) before
| arming.
| Any insight why this is not considered standard or important? What is
| the point of arming the alarm and leaving the back door unlocked?
|
| Of course I had a alarm salesman in the house right after I bought it
| and asked him about door lock sensors and I got a more then
| disappointing answer (same for asking for some form of protection if
| the phone line is cut). It seems you can get much out of the sales
| people such I decided I would rather build the alarm myself.
|
| Tom
|
|




Posted by Jackcsg on October 25, 2005, 5:42 am
If you were  Registered and logged in, you could reply and use other advanced thread options
> I would like to install door lock sensors on an existing Ademco alarm.
> Ideally I would like to use wireless sensors such I do not have to run
> additional wires.

You'd be looking at about $400 a door.

> Is there any readily available door lock sensor that can be added to an
> existing installation? (preferable wireless)?

Yes, however it would be more economical to wire these such devices.

> I searched but actually hardly found any info on such sensors. I would
> have though that should have been actually a standard part of any alarm
> to confirm that all doors are locked (and not only closed) before
> arming.
> Any insight why this is not considered standard or important?

Tom it is important to most, just not what most consider affordable.

What is
> the point of arming the alarm and leaving the back door unlocked?

What is the point of owning a home if you're not intelligent enough to make
sure they are?

>
> Of course I had a alarm salesman in the house right after I bought it
> and asked him about door lock sensors and I got a more then
> disappointing answer (same for asking for some form of protection if
> the phone line is cut). It seems you can get much out of the sales
> people such I decided I would rather build the alarm myself.

You could have purchased an alarm that could have controlled 4 door locks,
with readers at each door (For unlocking and disarming), and communicated
over a Grade "AA" (Line Security) broadband connection...but you didn't. You
went for the cheapest solution, and now you're realizing your
limitations...welcome to the mainstream. Buy American.

>
> Tom
>




Posted by Bill on October 25, 2005, 8:07 am
If you were  Registered and logged in, you could reply and use other advanced thread options
The problem with "door lock sensors" would be; the locks themselves, the
doors, the jambs, and maintenance/replacement of all of these.

Wood doors will grow or shrink with humidity changes. So if you have a
switch in the jamb which detects that a dead bolt is thrown, you may have
trouble adjusting it if the door is growing and shrinking with humidity
changes.

Then hinges will come lose and the alignment of the door may change.

Switches located in the jamb would need maintenance and adjustment. Say a
new door and deadbolt was installed with a longer "throw". You would need to
be able adjust the switch back for the longer throw. So access covers to the
switches would be needed as well as a method of adjusting the switch.

Some safe/vault doors have such sensors. But you have an all metal door and
jamb along with a precision locking system.

Install switch in locksets only? Most residential locksets are far from
being precision devices. Imagine some sort of switch in a cheap residential
regular door knob - the kind where there is so much play, you can wobble the
whole thing every which way.

I would think the best solution would be a precision lockset specifically
designed for this. The deadbolt would probably be easy. But the door knob
lock would need to be a positive "locked" "not locked" design without any
play or in-between allowed.

Also if it is a wired device, the wire to the door is prone to wearing out
and needing replacement. (As is with businesses with gless break sensors on
their door windows.)




Posted by Jackcsg on October 25, 2005, 12:01 pm
If you were  Registered and logged in, you could reply and use other advanced thread options
Bill, relax. You're going into hyperdrive. There are many manufacturers who
have been doing this type of application for years. The nicest, but not
cheapest, way to secure a residential door is by utilizing a power lever
set. The handle provides truly "locked" feedback, and can be used in
conjunction with a door "shunt"switch/contact. It gets away from installing
a door strike into the frame, which doesn't offer the locked status of the
lever.
Here's the Manufacturer we use www.marksusa.com


> The problem with "door lock sensors" would be; the locks themselves, the
> doors, the jambs, and maintenance/replacement of all of these.
>
> Wood doors will grow or shrink with humidity changes. So if you have a
> switch in the jamb which detects that a dead bolt is thrown, you may have
> trouble adjusting it if the door is growing and shrinking with humidity
> changes.
>
> Then hinges will come lose and the alignment of the door may change.
>
> Switches located in the jamb would need maintenance and adjustment. Say a
> new door and deadbolt was installed with a longer "throw". You would need
to
> be able adjust the switch back for the longer throw. So access covers to
the
> switches would be needed as well as a method of adjusting the switch.
>
> Some safe/vault doors have such sensors. But you have an all metal door
and
> jamb along with a precision locking system.
>
> Install switch in locksets only? Most residential locksets are far from
> being precision devices. Imagine some sort of switch in a cheap
residential
> regular door knob - the kind where there is so much play, you can wobble
the
> whole thing every which way.
>
> I would think the best solution would be a precision lockset specifically
> designed for this. The deadbolt would probably be easy. But the door knob
> lock would need to be a positive "locked" "not locked" design without any
> play or in-between allowed.
>
> Also if it is a wired device, the wire to the door is prone to wearing out
> and needing replacement. (As is with businesses with gless break sensors
on
> their door windows.)
>
>




Similar ThreadsPosted
Safe Room Door Lock February 8, 2006, 10:47 am
Wireless Motion Sensor slow to start February 25, 2006, 7:43 pm
wireless driveway sensor - cold region May 15, 2006, 12:24 pm
Wireless Motion Sensor goes off when A/C set to higher temps September 11, 2006, 12:45 pm
Mounting wireless door transmitter? October 7, 2005, 9:21 pm
Vista-15p lock out October 20, 2005, 4:25 pm
Lock on panel January 29, 2008, 2:04 am
Electric Lock choice July 29, 2005, 6:53 pm
Electromagnetic lock wiring February 10, 2006, 8:51 pm
lock with motion detector and alarm December 25, 2006, 9:07 pm

The site map in XML format XML site map

Contact Us | Privacy Policy