developers.home-assistant/blog/2024-10-08-unit-of-conductivity-changes.md

author	authorURL	title
Erik Montnemery	https://github.com/emontnemery	Changes to the UnitOfConductivity enum

The UnitOfConductivity enum has been changed from:

  class UnitOfConductivity(StrEnum):
    """Conductivity units."""

    SIEMENS = "S/cm"
    MICROSIEMENS = "µS/cm"
    MILLISIEMENS = "mS/cm"

To:

  class UnitOfConductivity(StrEnum):
    """Conductivity units."""

    SIEMENS_PER_CM = "S/cm"
    MICROSIEMENS_PER_CM = "µS/cm"
    MILLISIEMENS_PER_CM = "mS/cm"

The old enum members can be used during a deprecation period of one year, to give time for custom integrations to migrate to the new enum members.

See core PR #127919 for implementation details.