The ATC Diversified Electronics SLM-440-ASE is a member of the SLM Series, which are microprocessor-based three-phase monitors designed to protect industrial equipment from damaging electrical faults. With advanced monitoring capabilities, the SLM-440-ASE provides reliable and precise monitoring of voltage, frequency, and phase sequence to ensure optimal performance and safety of your machinery. This compact and versatile device is a must-have for any industrial application where power quality is crucial.