An analog level sensor with a reed chain and float uses the movement of a float in the liquid level. The sensor consists of a reed chain with reed switches attached to a flexible metal band, and a float that moves on the surface of the liquid. The float, equipped with a magnet, moves along the reed chain, which is positioned vertically in the container when the liquid level changes. The magnet activates the reed switches, which then generate electrical signals. These signals are captured by a measuring device and converted into measurable values. Additionally, the temperature of the liquid is monitored.

Temperature measurement is performed with precise PT100 or PT1000 sensors, which utilize the resistance of a metal that changes with temperature. A PT100 sensor has a platinum resistance whose value decreases as the temperature increases, while a PT1000 sensor has a resistance that is 1000 times greater. The resistance values of the PT sensors are converted into temperature values and can be transmitted to control and regulation systems to monitor the temperature and control processes.

The bi-metal switch, made of two metal strips with different coefficients of thermal expansion, detects temperature changes through deformation when a specific threshold is reached. This deformation triggers mechanical movement, opening or closing the electrical contact. When the switch is open, the circuit is interrupted to prevent overheating. When the switch is closed, current flows to activate, for example, a fan or heating element.