The Siemens SENTRON PAC3220 is a powerful multifunction meter for panel mounting, specifically designed for precise measurement of electrical parameters in power distribution systems. Featuring a graphical LCD display with dimensions 96 × 96 mm, it provides clear and user-friendly visualization of measurement values. The device is ideal for monitoring power inputs, electrical outputs, or individual consumers in process and manufacturing industries, as well as in critical infrastructures such as hospitals and data centers. It enables comprehensive analysis of power quality and system condition, thereby optimizing energy efficiency and operational reliability. The communication capability via Modbus TCP allows easy integration into higher-level automation and energy management systems. Additional modules extend functionality with digital inputs and outputs, analog inputs, direct N-conductor measurement, or differential current measurement. The device operates with an auxiliary power supply of 100 to 250 V AC/DC (±10 %) and is designed for a rated voltage range of 690/400 V at 45–65 Hz. The screw terminal connections ensure secure and reliable connections. Thus, the SENTRON PAC3220 is a reliable, repeatable, and precise measuring instrument for demanding applications in industrial power monitoring.