Working for an alarm company central station I learned a lot of tricks. One important one is with window sensors only work if the window is closed. Weather permitting, we like our window open partially for air. Selling extra magnets allows you to use 2 or even 3 at intervals. one placed just lower than is needed to climb thru. This way you can open the window up to where the extra magnet is. Noone can climb in without opening it more which will notify you. Perfect also if noone is home.
I doubt there’s a large enough market for them to sell those separately, but you can certainly rig up your own solution. Any magnet should work, but you may need to experiment a little to make sure the polarity is aligned correctly. Or just buy an extra sensor. They’re only $5.
I love this idea because my dog likes to jump out windows. I could set the window at different levels and know that she couldn’t get out
The least expensive reed switches are normally open and are not affected by the polarity of the magnet, just the angle of the magnetic field. I would presume they are the kind being used.
Well, that’s what I meant. Maybe I used the wrong term. Basically, you need to align the magnet correctly. I thought that had to do with the poles of the magnet, but maybe I don’t know what I’m talking about.
You basically are talking about it correctly just using kind of the wrong verbiage. The poles do have to be opposites so that they attract each other and they do have to be aligned somewhat or they won’t attach to each other so you’re kinda correct of in both ways.
Nice idea. But your “average” rare earth magnets sold on Amazon seem to work fine to trigger the sensors.
That’s what I use on my metal doors instead of the magnet that comes with the contact sensors
100 pieces for $12… Just don’t let the kids swallow them.
Yeah, they make cows swallow magnets but I don’t think kids need them
But just think if you had your kids swallow enough magnets you could say get over here and hold a bunch of magnets and Zap you’re kid would be right there. they could never run away from you. how much fun would that be.
When it’s time for them to do their homework make ‘em sit in a metal chair.