Models with an electronic counting unit complete with a programmer and a printer allow you to set the amount of gas required for draining, enter temperature correction, record and print reports at the beginning and end of a shift, and a daily report. The structural elements are made of high-tech alloys, and their replacement does not require complete disassembly of the meter. Counting units are equipped with a counter, non-return and differential valves, a gas separator with a fine filter, a VR type mechanical counter, and a printing device.