In modern energy monitoring and building management systems, precise measurement of power consumption is of essential importance. The Meter 1f PRO1-Mb from HW-group is a high-precision single-phase energy meter available in two variants – 45A M-Bus and 100A M-Bus. This compact device was designed for accurate energy consumption measurement and real-time current monitoring and stands out with its MID certification, which qualifies it for billing purposes.

Thanks to its M-Bus interface (EN 13757-3), the Meter 1f PRO1-Mb integrates seamlessly into modern monitoring systems. It provides highly precise measurements such as voltage, current, active power, reactive power, frequency, and power factor – either displayed locally via its integrated LCD display or remotely via M-Bus. Its versatility, combined with a robust design, makes it ideal for both industrial and IT environments, such as data centers and server facilities.

The two available versions allow users to choose the meter best suited for their specific application: the 45A model is ideal for smaller consumers or office installations, while the 100A version is designed for higher loads found in production facilities or large buildings. The modular DIN rail design allows for space-saving installation, occupying only a single 17.5 mm-wide module.

With its programmable pulse output (S0), the Meter 1f PRO1-Mb also offers a universal interface for system integrators who want to utilize consumption data not only via M-Bus but also in combination with other data acquisition systems.

Advanced Measurement Technology with MID Certification

The MID (Measuring Instruments Directive) certification according to 2014/32/EU confirms that the meter meets all relevant European standards for measuring instruments and is approved for end-user billing. This is especially important in commercial and industrial contexts, where measurement data forms the basis for invoices, cost allocation, or internal consumption accounting.

Accuracy class 1/B ensures precise measurements across the entire measuring range. This means minimal deviation from actual consumption values and gives operators confidence that all recorded data is reliable and verifiable. In particular, when allocating costs between tenants or departments, such precise and certified measurements are indispensable.

M-Bus Interface for Remote Reading and Integration

The M-Bus interface is an internationally recognized standard for transmitting consumption data. With this technology, not only individual meters but even entire groups of energy meters can be integrated into a unified monitoring and management system. The Meter 1f PRO1-Mb can be easily connected to existing M-Bus networks, whether in small office buildings or large industrial complexes.

Through the M-Bus connection, all measurement parameters can be retrieved in real time, enabling continuous power consumption monitoring. In combination with software solutions such as HWg-PDMS or SCADA systems, energy consumption can be visualized, analyzed, and optimized.

Versatile Applications in IT, Industry, and Building Management

• Building management: Recording energy consumption to reduce costs and increase energy efficiency.
• Data centers and IT infrastructure: Precise monitoring of the power consumption of individual racks or UPS units to prevent overloads.
• Industrial production lines: Real-time monitoring of machine loads to detect bottlenecks or inefficiencies early.
• Billing purposes: MID-compliant meters enable fair energy cost allocation.
• Energy optimization: Analysis of consumption patterns and implementation of load management strategies to lower costs.

Technical Details of the Meter 1f PRO1-Mb

• Input voltage: 230 V AC
• Current range: 0.25–45 A (45A version) or 0.25–100 A (100A version)
• Accuracy class: 1/B according to MID 2014/32/EU
• Interfaces: M-Bus (EN 13757-3), programmable pulse output (S0)
• Measurement parameters: Voltage, current, active power, reactive power, apparent power, frequency, power factor
• Operating temperature: –25 °C to +55 °C (45A) / –40 °C to +70 °C (100A)
• Design: 1 DIN module (17.5 mm width)
• Weight: approx. 80 g
• Connections: durable screw terminals for current and M-Bus wiring

Easy Installation and Quick Commissioning

Thanks to the DIN rail mounting system, installation of the meter is especially simple and fast. The user mounts the meter on the rail, connects the power supply via screw terminals, and links the M-Bus interface to the energy management system. Commissioning is completed within minutes.

The programmable pulse output also allows flexible integration into systems that do not support direct M-Bus connectivity, making the meter suitable for hybrid installations.

Integration into HW-group Monitoring Systems

In combination with HW-group devices such as HWg-PWR or the Perseus Energy series, a complete energy monitoring system can be created that goes far beyond simple power measurement. Additional environmental parameters such as temperature, humidity, or leakage can be integrated to achieve a comprehensive overview of the infrastructure.

Data transmission can be managed via web interfaces, SNMP, e-mail alerts, or cloud portals. The free HWg-PDMS software additionally allows in-depth analysis of long-term data and export to Excel for detailed audit and compliance reports.

Precision, Flexibility, and Efficiency

The Meter 1f PRO1-Mb is the ideal solution for those who demand maximum accuracy and reliability in energy consumption measurement. Whether used in industry, data centers, or building management, this single-phase energy meter provides a future-proof tool delivering precise measurement data while integrating seamlessly into existing systems.

The MID certification ensures legally compliant billing measurements, while the combination of M-Bus and programmable pulse output offers maximum flexibility for system integration. With its compact design, robust engineering, and wide temperature tolerance, the meter performs reliably even in demanding environments.

Available Variants

• Meter 1f PRO1-Mb 45A M-Bus: Single-phase energy meter up to 45 A, with M-Bus data output, ideal for smaller loads.
• Meter 1f PRO1-Mb 100A M-Bus: Single-phase energy meter up to 100 A, with M-Bus data output, designed for higher loads.