Re: Wireless Door Lock Sensor

["Jackcsg" <nospam@xxxxxxxxxx>]

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


"Bill" <bill190nospam@xxxxxxxxx> wrote in message
news:3s702aFmivq3U1@xxxxxxxxxxxxxxxxx
> 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.)
>
>