The circuit meter is used to measure the amount of electrical energy consumed in a certain period of time. It could be easily installed on the din rail of the power box, it needn't resistance, could be connected in the loop directly. It can not only reflect the size of the power consumed by the load, but also reflect the sum of the accumulation of electric energy over time.

It is widely used in control system, energy management system, substation automation, distribution network automation, building automation, industrial automation, residential district power monitoring, intelligent building, switch cabinet and so on.