OBIS (Object Identification System) Codes

The Object Identification System (OBIS) codes are a standardized set of numerical identifiers used to classify and represent the types of energy or resources being measured by meters. These codes help organize data for accurate measurement and billing in energy systems.

What OBIS Codes Do

OBIS codes are used to identify the type of resource or energy being measured. Common examples include electricity, gas, water, and thermal energy. They also classify various data characteristics, such as electrical energy, active power, integration, tariff, and billing period.

How OBIS Codes Work

OBIS codes are formatted as a string of numbers in the following structure: A-B-D- E Each section of the code has a specific meaning:

• A: Medium – Represents the type of energy or resource (e.g., "1" for electricity, "6" for heat)
• B: Channel – Identifies the channel used for measurement (e.g., "1–9" for energomaster, "x" for unpaired sensor)
• C: Physical Quantity – Indicates the type of measurement (e.g., voltage, energy)
• D: Quantity Computation – Reflects the result of a specific computation or algorithm
• E: Measurement Type – Defines individual measurements within the specified groups A to D

Who Defines OBIS Codes

The DLMS User Association is responsible for defining and allocating OBIS codes, ensuring their proper standardization and use.

How Many OBIS Codes Are Available

There are a total of 281,474 billion OBIS codes available for use, with 4,398 billion reserved for standardization purposes.