Pääsuandurid

Pääsuandurid, commonly translated as "access sensors" or "entry sensors," are devices used to detect whether a door or window has been opened or closed. They are a fundamental component in many security systems, home automation setups, and even in some industrial applications. The primary function of a pääsuandur is to provide an alert or trigger an action when a specific entry point is compromised or utilized.

Most pääsuandurid operate on a simple magnetic principle. They consist of two parts: a sensor and a magnet. The sensor is typically mounted on the frame of a door or window, while the magnet is attached to the movable part, such as the door or window itself. When the door or window is closed, the magnet is close to the sensor, completing a circuit and indicating a secure state. When the door or window is opened, the magnet moves away from the sensor, breaking the circuit and signaling an open state.

These sensors can be wired or wireless. Wired sensors are directly connected to a control panel, requiring physical installation. Wireless sensors communicate with a central hub or receiver using radio frequencies, offering greater flexibility in placement and easier installation. Pääsuandurid are crucial for triggering alarms in security systems, notifying homeowners of unexpected entry, or for home automation purposes such as turning lights on or off when a door is opened. Their reliability and ease of use have made them a ubiquitous technology for monitoring entry points.