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+---
+author: Jan-Philipp Benecke
+authorURL: https://github.com/jpbede
+authorImageURL: https://avatars.githubusercontent.com/u/3989428?s=96&v=4
+title: "Deprecate invalid use of sensor unit of measurement and state class"
+---
+
+Since Home Assistant Core 2022.12, a warning is issued in the logs if a sensor entity that has a device class 
+uses unit of measurement and state class incorrectly, taking their device class into account.
+
+An invalid use would be a sensor entity that has a device class of `SensorDeviceClass.TEMPERATURE` but uses 
+the unit of measurement `%` instead of `°C` or `°F`; or the state class `SensorStateClass.TOTAL` 
+instead of `SensorStateClass.MEASUREMENT`.
+
+There will be a six-month deprecation period to ensure all custom integration authors have time to adjust.
+As of Home Assistant Core 2024.8, the warning will then be replaced by an exception.
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