Mbus/RS485 Metering Sensor

Name: Mbus/RS485 Metering Sensor
Brand: WEIFENG WF8002 Metering Chip for Smart Water Meter and Smart Gas Meter
SKU: V11201-RS485
Price: 10.00 USD
Availability: InStock
Rating: 5 (1 reviews)

No.V11201-RS485

M-Bus (Meter-Bus) and Wireless M-Bus (wM-Bus) are the European standards (EN 13757) designed for the remote reading of utility meters (water, gas, electricity, and heat).

1. M-Bus (Wired)

Definition: A cost-effective wired bus system.
Physical Connection: Uses a simple two-wire cable (twisted pair).
Powering: The bus can power the slave devices (meters) directly, meaning meters often don't need internal batteries.
Topography: Typically a Master/Slave structure where one master can read up to 250 meters over several kilometers of cable.
Best For: New constructions or industrial sites where running cables is feasible.

2. Wireless M-Bus (wM-Bus)

Definition: The wireless extension of the M-Bus protocol.
Frequencies: Operates on license-free sub-GHz bands: 868 MHz (most common in Europe), 433 MHz, and 169 MHz.
Powering: Meters are battery-powered and designed to last 10–20 years by staying in sleep mode and waking up only to transmit.
Modes: Includes S (Stationary), T (Frequent Transmit), and C (Compact) modes.
Best For: Retrofitting existing buildings, "Walk-by/Drive-by" mobile reading, or areas where wiring is too expensive.

Key Comparison

Feature	M-Bus (Wired)	Wireless M-Bus
Medium	Telephone-type cable	Radio Frequency (RF)
Range	Long (km via wire)	Short to Medium (100m - 2km)
Reliability	Very High (No interference)	High (But subject to obstacles)
Installation	High cost (Labor/Wiring)	Low cost (Plug & Play)
Data Layer	Same (EN 13757-3)	Same (EN 13757-3)

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Description

M-Bus (Meter-Bus) and Wireless M-Bus (wM-Bus) are the European standards (EN 13757) designed for the remote reading of utility meters (water, gas, electricity, and heat).

1. M-Bus (Wired)

Definition: A cost-effective wired bus system.
Physical Connection: Uses a simple two-wire cable (twisted pair).
Powering: The bus can power the slave devices (meters) directly, meaning meters often don't need internal batteries.
Topography: Typically a Master/Slave structure where one master can read up to 250 meters over several kilometers of cable.
Best For: New constructions or industrial sites where running cables is feasible.

2. Wireless M-Bus (wM-Bus)

Definition: The wireless extension of the M-Bus protocol.
Frequencies: Operates on license-free sub-GHz bands: 868 MHz (most common in Europe), 433 MHz, and 169 MHz.
Powering: Meters are battery-powered and designed to last 10–20 years by staying in sleep mode and waking up only to transmit.
Modes: Includes S (Stationary), T (Frequent Transmit), and C (Compact) modes.
Best For: Retrofitting existing buildings, "Walk-by/Drive-by" mobile reading, or areas where wiring is too expensive.

Key Comparison

Feature	M-Bus (Wired)	Wireless M-Bus
Medium	Telephone-type cable	Radio Frequency (RF)
Range	Long (km via wire)	Short to Medium (100m - 2km)
Reliability	Very High (No interference)	High (But subject to obstacles)
Installation	High cost (Labor/Wiring)	Low cost (Plug & Play)
Data Layer	Same (EN 13757-3)	Same (EN 13757-3)

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