JT series products have functions of control, measurement and sending signal, widely applied to workshops, master control rooms and experimental stations of factories and enterprise, especially for metallurgy and heay-duty machinery manu facturing. It is structured by steel sheet, with doors in the front and back, the measuring instruments, control switch, signal lamp, master controller and so on can be installed on the console, and rheostat, voltage regulator and miniature mains transformer can be installed inside it.