Sensors For Double-Hung Windows

Old 02-11-06, 08:57 PM
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Question Sensors For Double-Hung Windows


I recently purchased a Concord Ultra system. Thankfully I haven't purchased too many sensors, because I've ran into a problem that I hadn't anticipated.

All the windows in my house are double-hung vinyl windows, and I assumed that one sensor would take care of each window (I've got 32 windows), i.e. sensor on one pane and magnet on the other pane, so if either pane was moved the cicuit would trip.

While there is enough space to install the sensor on the horizontal sash, I don't appear to have enough space to install the magnet on the other pane.

I originally planned on using NX454, but the magnet won't fit. I then thought I'd use recessed sensors instead, but the NX458 sensor is 1.75"W and the sash width is 1"W.

I assume other people have encountered this issue, so hopefully there is a sensor that will work, as I really don't want to use two sensors on each window (extra $1K right there).

Does anyone know if the micro-sensors fit a double-hung window?


Old 02-11-06, 09:35 PM
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Vinyl windows are always problematic, as are double hung windows. What you may have to do, is wire a pair of the smaller conventional contacts on the moving sections of the windows, and wire them to the hardwire input on the transmitter. You will have to program the sensor to work int this manner, but it's the cheapest and most effective solution I know of. You can use any of the transmitters that have HW inputs, and simply mount the transmitter behind the curtain line, or similar location.
Old 02-12-06, 05:26 AM
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Double Hung Windows

I used the micro sensors and put them horizontal on the frame where the window latch is in the middle. I attached the magnet to the upper window and the sensor on the lower window.

Works fine!
Old 02-12-06, 05:57 AM
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Originally Posted by Henrydunne
I originally planned on using NX454, but the magnet won't fit. I then thought I'd use recessed sensors instead, but the NX458 sensor is 1.75"W and the sash width is 1"W.
The NX454 is the smallest wireless switch out there (for any brand). The actual switch itself should fit on your sash being that it's only .875" wide, and 1.75" long. As you said above the magnet is too large? I'd suggest doing what we do when we run into this issue, use a smaller magnet. There are quiet a few brands of surface mount magnets out there that are smaller than the one that comes with the NX454 and will be able to fit next to the glass on your upper half of the double hung. What I need to know is how much space w x l you have to fit the magnet in and I can recommend a product for you.

As far as the nx454 is this the switch you were looking at, itís the Micro switch for GE's concord series.

The micros are a great product 5-8 year battery life with normal use and you can change your own battery. The switch has a low profile so that don't look horrid in your windows especially windows on the front of your house. The larger NX-652's has a great battery life (20 years is possible). But they are permanent batteries, you'll have to replace the whole transmitter and they look horrible from an outdoor view of the house.


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