The new generation of UG counters combine a high accuracy, stability and reliability of measurement, in addition to a high security against fraud due to the patented index. The measurement groups have a high precision metrology, thanks to the original 3-wheel calibration system and the high quality of the materials used and a low pressure absorption. Cases can be supplied in galvanized and pressed steel (P max 0.5 bar) as well as in diecast aluminum (Pmax 2 bar). The UG meters can be used for the precise measurement of natural, manufactured, propane and other not corrosive gases.