diff --git a/homeassistant/components/epion/sensor.py b/homeassistant/components/epion/sensor.py
index 80cf47caa4ab..d3a16edf3077 100644
--- a/homeassistant/components/epion/sensor.py
+++ b/homeassistant/components/epion/sensor.py
@@ -8,12 +8,7 @@ from homeassistant.components.sensor import (
     SensorEntityDescription,
     SensorStateClass,
 )
-from homeassistant.const import (
-    CONCENTRATION_PARTS_PER_MILLION,
-    PERCENTAGE,
-    UnitOfPressure,
-    UnitOfTemperature,
-)
+from homeassistant.const import UnitOfPressure, UnitOfRatio, UnitOfTemperature
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.device_registry import DeviceInfo
 from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
@@ -26,7 +21,7 @@ SENSOR_TYPES: tuple[SensorEntityDescription, ...] = (
     SensorEntityDescription(
         device_class=SensorDeviceClass.CO2,
         state_class=SensorStateClass.MEASUREMENT,
-        native_unit_of_measurement=CONCENTRATION_PARTS_PER_MILLION,
+        native_unit_of_measurement=UnitOfRatio.PARTS_PER_MILLION,
         key="co2",
         suggested_display_precision=0,
     ),
@@ -40,7 +35,7 @@ SENSOR_TYPES: tuple[SensorEntityDescription, ...] = (
     SensorEntityDescription(
         device_class=SensorDeviceClass.HUMIDITY,
         state_class=SensorStateClass.MEASUREMENT,
-        native_unit_of_measurement=PERCENTAGE,
+        native_unit_of_measurement=UnitOfRatio.PERCENTAGE,
         key="humidity",
         suggested_display_precision=1,
     ),