Wired sensors
prices on 174 modelsWired
— connecting with a wire is not very convenient for organization — due to the need to lay a wire, the length of which also limits the distance to the control device. On the other hand, the connection turns out to be as reliable and safe as possible, such sensors are much cheaper than wireless ones, and their operation does not require separate power sources — energy can be supplied through the wire used for connection (although there are also models on batteries and batteries — see more details. " Nutrition").Also note that purely technically, such a sensor is easier to disable than a wireless one — just cut the wire; however, in fact, this is not easy to do, since you need to have physical access to the wiring.