Rheostat is an adjustable resistance connected into an electrical circuit to provide a means of control while the
circuit is “live”. Our Rheostats have been accurately studied and in order to obtain the best performance, only first
quality raw materials are used in the construction: for the tubes, special porcelain of high thermal and electrical
resistance is used; for the winding only oxidised and annealed constantan of high quality , unalterable , even when
strongly heated and with negligible coefficient of temperature , is used in all types.