M-Bus (Meter-Bus) and RS485 are the two wired buses most European utilities use to collect consumption data. Our WF8002-based M-Bus and RS485 metering sensors turn the rotation of a mechanical meter’s metal pointer into a digital count, so a meter that is already installed can join a wired bus network without changing its metrology.
A PCB coil pair driven by the WF8002 inductive sensing ASIC detects the passage of the metal target on the meter pointer. There is no magnet and no reed contact, so the reading cannot be disturbed by an external magnet and there is no contact wear. The chip converts each detected target into a pulse, and the module sends the accumulated count over M-Bus or RS485.
| Bus output | M-Bus or RS485 |
| Protocol | M-Bus EN 13757 / 188 |
| Sensing | Non-magnetic inductive, forward and reverse running |
| Power | Ultra-low current draw |
| Compliance | RoHS 2.0 |
