From Alertme
Here are some tips on ways to position Door/Window Sensors when your door, or window, is awkwardly shaped. AlertMe has endeavoured to make a small and easy to use sensor, but on some doors and windows, fitting any sensor can be fiddly.
Once you have installed your AlertMe system, make sure you do a test to ensure your door and window sensors are working correctly.
Testing a Door/Window Sensor
First, close all your doors and windows which have Door/Window Sensors on them. Then, attempt to set your AlertMe system to Away using a Keyfob, or the website. If this works without a "Door/window Sensor is open" warning, then your sensors are OK. If you get a warning, check MyHistory on the website to see which Sensor was reporting that it was open, when the door/window was in fact shut, and then try repositioning that sensor. Now, you have tested whether your sensors are correctly detecting a closed door.
Now, close all your doors and windows which have Door/Window Sensors on them again; then open one of them. Attempt to set your AlertMe system to Away using a Keyfob, or the website. If this works without a "Door/window Sensor is open" warning, then the door which is open is not correctly detecting that it has been opened. If you get a warning, then all is well. Close that door, and open another, and repeat the test. Now, you have tested whether your sensors are correctly detecting an open door.
Tips for positioning
Bear in mind the usual guidelines, shown here.
Try putting the small sticky pad on the side of the small, magnetic sensor part (the side without the pair of little lines). This will let you position it differently.
You may find you can mount the sensor on a bit of angled frame, and still have it work. An example is below.
Or, you could try adding a spacer (such as a bit of plastic, or a section of an old credit card) to move the magnet part of the sensor:
These images also show the use of a bit of electrical cable conduit, such as can be obtained from DIY stores, to move the main part of the sensor away from the door frame itself.
