20 Pack White Door Window Security Alarm Contact Surface Reed Home Switch Sensor

magnetic door contacts consist of a magnet and the reed switch I will now give you a close-up about these are wired in the early work normally the magnets will be fixed to the door and the lease which would be fixed to the door frame and there will be in that kind of position although there will be a slight gap when they were on the door if you look at the reed switch you can see that there are two silver terminals with the wire coming off they are the terminals that have actually going to the reed switch so I'm going to place that down and here we have a continuity tester it's actually a voltage test of this but you can use it for continuity as well so if we press the bottom you can see that there's not continuity oh it's all good press it and touch the probes we get continuity for place the V switch directly up above the magnet and put the frogs onto the reed switch you can see that i