Ampere Hour meters are used to measure charge flowing in a process. Major areas of apllication are Electroplating and Battery charging; to monitor the charge and discharge of battery. IM 2501 Ampere Meter has 4 digit display, integrated with a facility to provide set point to control the rectifier. Relay is meter by meter, when some amount of charge is made to pass. This relay further turns ONOFF the rectifier.