The roll gate has a dedicated door magnet, which can be easily installed on the roll gate. Firstly, the “magnet†(the heaviest iron part) is installed and fixed on the inner side of the roller shutter (usually close to the side), and the “reed sensor†(lighter iron part) is installed and fixed on the corresponding lower floor. When the roll gate is closed, the distance between the "magnet" and the "reed sensor" is no more than 2 cm. The "reed sensor" is connected to the "soft signal transmitter" through a steel soft sheath. The "wireless signal transmitter" must be installed where the host can receive wireless signals. If the host is too far away from the "wireless signal transmitter" or there is shielding between them, the connection between the "wireless signal transmitter" and the "reed switch sensor" can be lengthened. For example, if a user lives on the 8th floor, the garage is On the first floor, you can extend the connection to the home of the 8th floor and install the "wireless signal transmitter" in the user's home so that the host can receive the wireless signal.
Square nuts are typically used where there is an inset or channel in the receiving surface, such as in furniture, railroad applications, or other metal assemblies. The larger surface area of square nuts allows them to more easily resist loosening.
square nut with spring, Square Nut, Square Pipe Fitting Steel Star Shaped Tube Insert Threaded Nut
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