The TN 1002012 is a high-quality isolating relay, commonly manufactured by Hydac, designed specifically for processing signals from level switches in hydraulic and lubrication systems. This component serves as a crucial interface between a low-power level sensor (like a reed switch) and a higher-power control system, such as a PLC or an alarm indicator. It provides galvanic isolation, ensuring that the sensitive control electronics are protected from potential faults in the sensor circuit. Its primary function is to reliably trigger an alarm or a control action when the fluid level in a reservoir drops below a predefined point, preventing equipment damage due to fluid starvation. The relay is typically designed for easy mounting on a standard DIN rail within a control cabinet.