The Siemens 9810TC is a power quality meter designed to monitor and analyze electrical parameters with high accuracy. It supports a maximum voltage of 690 VAC and operates with a control voltage range between 90-480 VAC or 11-480 VDC. This meter measures key variables such as voltage, current, and frequency, making it useful for detailed power quality analysis. It also features data logging capabilities and includes two RS485 communication ports for Modbus mastering, allowing seamless integration into industrial networks. Distributed by BSP Automation, the 9810TC provides a reliable solution for monitoring power systems, although it comes without a built-in display.