M-Bus (Meter-Bus) is a cost effective field bus used to transfer consumption data from different type of meters. A central master such as a PC with a gateway from Ethernet to M-Bus or RS232 to M-Bus communicate via a 2-thread bus with units (up to 250 loads per segment ) such as heat meters, water meters, electricity meters, gas meters as well as other type of sensors.

More and more manufactures implement the electrical interface M-Bus in their meters. M-Bus is a European standard which is described in standard EN1434-3, EN13757-1,2,3,4,5