Grounds for application: automation of instrument accounting, presence of multibranch network Ethernet (or LAN, also another names of networks are available) in chosen place ( including network, that is laid by internet providers or by digital television) and it’s accessibility for the purpose of instrument accounting, potential cheapness of connection, opportunity for entering internet network (without proxy-servers) for connection that supports unlimited distances. To meters X12 and gas volume compensators B25 in amount from 1 to 20, the adapter connector Ethernet of MOXA NPort 5110 type connects via RS232 adapter connector.