Panel MetersPanel meters are electronic devices that are used to display measurements of various electrical or physical quantities. These meters are typically mounted on a panel or control board, and are used in industrial automation and control systems to provide real-time information about the status or performance of a system. Common types of panel meters include voltmeters, ammeters, and frequency meters, which are used to measure voltage, current, and frequency, respectively. Panel meters can also be used to display other types of information, such as temperature, pressure, and flow rate. In many cases, panel meters are connected to sensors or other measuring devices in order to receive the input signal that is being measured.