Many models of scales exist: the autonomous trade balance with or without ticket running on batteries or sector, and the shopping scale connected to a cash register system.
The independent fund balanceon batteries or battery, is widely used by itinerant traders, markets for example.
The balancecashconnected is often used in the food outlets, such as the supermarkets, the chocolate, bakers or organic shops for example.
From the moment the balance of trade is designed to calculate a sales price for the customer, it must be controlled and must have a green sticker compliance with a validity date. In the case of a balance connected, it is all the cashier system which must be checked by the manufacturer that must therefore be determined directly in trade.