diff --git a/homeassistant/components/knx/schema.py b/homeassistant/components/knx/schema.py
index 49aaf532431..2498f5ca4e1 100644
--- a/homeassistant/components/knx/schema.py
+++ b/homeassistant/components/knx/schema.py
@@ -873,6 +873,7 @@ class SensorSchema(KNXPlatformSchema):
                 vol.Required(CONF_TYPE): sensor_type_validator,
                 vol.Required(CONF_STATE_ADDRESS): ga_list_validator,
                 vol.Optional(CONF_DEVICE_CLASS): SENSOR_DEVICE_CLASSES_SCHEMA,
+                vol.Optional(CONF_UNIT_OF_MEASUREMENT): cv.string,
                 vol.Optional(CONF_ENTITY_CATEGORY): ENTITY_CATEGORIES_SCHEMA,
             }
         ),
diff --git a/homeassistant/components/knx/sensor.py b/homeassistant/components/knx/sensor.py
index 92da35973e1..113964980f3 100644
--- a/homeassistant/components/knx/sensor.py
+++ b/homeassistant/components/knx/sensor.py
@@ -216,20 +216,22 @@ class KnxYamlSensor(_KnxSensor, KnxYamlEntity):
         dpt_string = self._device.sensor_value.dpt_class.dpt_number_str()
         dpt_info = get_supported_dpts()[dpt_string]
 
-        if device_class := config.get(CONF_DEVICE_CLASS):
-            self._attr_device_class = device_class
-        else:
-            self._attr_device_class = dpt_info["sensor_device_class"]
-
-        self._attr_state_class = (
-            config.get(CONF_STATE_CLASS) or dpt_info["sensor_state_class"]
+        self._attr_device_class = config.get(
+            CONF_DEVICE_CLASS,
+            dpt_info["sensor_device_class"],
         )
-
-        self._attr_native_unit_of_measurement = dpt_info["unit"]
-        self._attr_force_update = config[SensorSchema.CONF_ALWAYS_CALLBACK]
         self._attr_entity_category = config.get(CONF_ENTITY_CATEGORY)
-        self._attr_unique_id = str(self._device.sensor_value.group_address_state)
         self._attr_extra_state_attributes = {}
+        self._attr_force_update = config[SensorSchema.CONF_ALWAYS_CALLBACK]
+        self._attr_native_unit_of_measurement = config.get(
+            CONF_UNIT_OF_MEASUREMENT,
+            dpt_info["unit"],
+        )
+        self._attr_state_class = config.get(
+            CONF_STATE_CLASS,
+            dpt_info["sensor_state_class"],
+        )
+        self._attr_unique_id = str(self._device.sensor_value.group_address_state)
 
 
 class KnxUiSensor(_KnxSensor, KnxUiEntity):
diff --git a/tests/components/knx/test_sensor.py b/tests/components/knx/test_sensor.py
index 9fb3b85b9f2..45f0d8d52c2 100644
--- a/tests/components/knx/test_sensor.py
+++ b/tests/components/knx/test_sensor.py
@@ -12,11 +12,7 @@ from homeassistant.components.knx.const import (
     CONF_SYNC_STATE,
 )
 from homeassistant.components.knx.schema import SensorSchema
-from homeassistant.components.sensor import (
-    CONF_STATE_CLASS as CONF_SENSOR_STATE_CLASS,
-    SensorDeviceClass,
-    SensorStateClass,
-)
+from homeassistant.components.sensor import SensorDeviceClass, SensorStateClass
 from homeassistant.const import CONF_NAME, CONF_TYPE, STATE_UNKNOWN, Platform
 from homeassistant.core import HomeAssistant, State
 
@@ -183,10 +179,19 @@ async def test_always_callback(hass: HomeAssistant, knx: KNXTestKit) -> None:
     assert len(events) == 6
 
 
+@pytest.mark.parametrize(
+    "attribute_config",
+    [
+        {"state_class": "total_increasing"},  # invalid for temperature DPT
+        {"unit_of_measurement": "invalid"},
+        {"device_class": "energy", "unit_of_measurement": "invalid"},
+    ],
+)
 async def test_sensor_yaml_attribute_validation(
     hass: HomeAssistant,
     caplog: pytest.LogCaptureFixture,
     knx: KNXTestKit,
+    attribute_config: dict[str, Any],
 ) -> None:
     """Test creating a sensor with invalid unit, state_class or device_class."""
     with caplog.at_level(logging.ERROR):
@@ -196,17 +201,14 @@ async def test_sensor_yaml_attribute_validation(
                     CONF_NAME: "test",
                     CONF_STATE_ADDRESS: "1/1/1",
                     CONF_TYPE: "9.001",  # temperature 2 byte float
-                    CONF_SENSOR_STATE_CLASS: "total_increasing",  # invalid for temperature
+                    **attribute_config,
                 }
             }
         )
     assert len(caplog.messages) == 2
     record = caplog.records[0]
     assert record.levelname == "ERROR"
-    assert (
-        "Invalid config for 'knx': State class 'total_increasing' is not valid for device class"
-        in record.message
-    )
+    assert "Invalid config for 'knx': " in record.message
 
     record = caplog.records[1]
     assert record.levelname == "ERROR"