Open Metering System (OMS)

Keeping track of the energy consumption of a property can be both complex and time-consuming — especially when different meters and systems are not talking to each other. The Open Metering System (OMS) is an open, standardized solution that allows measurement data from electricity, heat, water and gas to be collected in a common, secure and manufacturer-independent system. For you as a property owner, this means quality-assured, standardized products with high encrypted security. Here you will get answers to frequently asked questions about how OMS works, why it is relevant for you in property management.

What is the Open Metering System (OMS)? 

The Open Metering System (OMS) is an open, vendor-independent communications standard for the measurement of electricity, gas, heat and water, including submetering. It makes it possible to collect and manage measurement data from different meters compatible with high compatibility.

What technology is OMS based on?

OMS is based on the European M-BUS standard (EN 13757) and supports both wired and wireless communication, making the system flexible and scalable.

Who is behind the OMS standard?

OMS Group e.V. is the non-profit organization behind OMS. Founded in 2015, the group consists of over 70 companies from 22 different countries, including meter manufacturers, energy companies and IT companies.

What are the advantages of OMS?

OMS provides interoperability between different manufacturers and systems, reducing lock-in effects. It offers high data security through AES 128 encryption and supports integration with KNX standards* for smart buildings.

Future-proof standard — based on established European standards.
Open and interoperable — meters from different manufacturers work seamlessly together.
Freedom of choice — you are not tied to a specific provider.
Long-Term Reliability — investments in meters retain their value over time.
Direct communication — provides readout, debugging, leak checking and disconnect detection.
Energy efficiency — support for Smart Grids and the integration of renewable energy.

How does OMS contribute to energy efficiency and digitalisation?

By enabling seamless data collection and communication from different meters, OMS supports smart grids and energy efficient solutions in properties and communities.

Can anyone use the OMS standard?

Yes, the OMS specification is publicly available and free from patent restrictions. It allows manufacturers and system vendors to implement OMS without licensing costs.

What does OMS mean for the future of energy measurement?

OMS creates a future-proof and flexible platform for digital measurement. The open standard facilitates innovation, competition and sustainable investment in energy infrastructure.

‍