Meters that measure the amount of electrical energy produced or consumed, or the work produced and consumed in circuits, are called electricity meters. The more devices or equipment operating on the electrical circuit, ie the more electrical energy is consumed, the faster the pointer on the meter rotates. Electricity meters show the amount of energy consumed in watts / hour.

In the electricity meters, the pointer continuously makes a rotational movement. The speed of this rotational motion is fully proportional to the power of the dissipated electricity. Mechanically, instead of the counter torque, the braking torque is proportional to the speed of the continuously rotating pointer. The braking torque is on a disk which is fixed on the same shaft as the pointer. Therefore, the rotating system with the effect of electric current in these meters deviates by an angle.

Electricity meters are two types, analog and digital. Anolog meters consist of electromagnet, aluminum disc and permanent magnet. The aluminum disc rotates freely between the poles of the electromagnet. Digital meters have electronic circuit elements. These meters have LCD panel, led signal outputs, call button and reset button.

Electricity meters are connected by qualified electricians and sealed by officials. In general, electricity meters are directly connected in low voltage networks, such as in homes or small businesses.

Nowadays, smart meter systems which are designed for home and workplaces and whose features vary according to individuals and businesses are becoming widespread. In this way, more efficient use of energy is ensured while illegal electricity usage is prevented.

In control cards, the system is based on prepaid credit. Consumers get the right to use electricity as much as the loan they receive by paying in advance. In this system, information such as consumption amount, remaining usage right, total consumption amount within a certain time, last power cut error, unauthorized intervention date, last credit loading date and meter type and serial number can be obtained from the meter.

LVD tests are required to ensure safe operation of electrical meters and control cards and to avoid any danger to human health and property safety.