diff --git a/homeassistant/components/bthome/sensor.py b/homeassistant/components/bthome/sensor.py
index d80763d4600..9d68ce2d3b4 100644
--- a/homeassistant/components/bthome/sensor.py
+++ b/homeassistant/components/bthome/sensor.py
@@ -145,14 +145,14 @@ SENSOR_DESCRIPTIONS = {
     # Used for mass sensor with kg unit
     (BTHomeSensorDeviceClass.MASS, Units.MASS_KILOGRAMS): SensorEntityDescription(
         key=f"{BTHomeSensorDeviceClass.MASS}_{Units.MASS_KILOGRAMS}",
-        device_class=None,
+        device_class=SensorDeviceClass.WEIGHT,
         native_unit_of_measurement=MASS_KILOGRAMS,
         state_class=SensorStateClass.MEASUREMENT,
     ),
     # Used for mass sensor with lb unit
     (BTHomeSensorDeviceClass.MASS, Units.MASS_POUNDS): SensorEntityDescription(
         key=f"{BTHomeSensorDeviceClass.MASS}_{Units.MASS_POUNDS}",
-        device_class=None,
+        device_class=SensorDeviceClass.WEIGHT,
         native_unit_of_measurement=MASS_POUNDS,
         state_class=SensorStateClass.MEASUREMENT,
     ),
diff --git a/homeassistant/components/litterrobot/sensor.py b/homeassistant/components/litterrobot/sensor.py
index 1a8f066f54b..b9d70528cab 100644
--- a/homeassistant/components/litterrobot/sensor.py
+++ b/homeassistant/components/litterrobot/sensor.py
@@ -111,6 +111,7 @@ ROBOT_SENSOR_MAP: dict[type[Robot], list[RobotSensorEntityDescription]] = {
             name="Pet weight",
             icon="mdi:scale",
             native_unit_of_measurement=MASS_POUNDS,
+            device_class=SensorDeviceClass.WEIGHT,
         ),
     ],
     FeederRobot: [
diff --git a/homeassistant/components/mysensors/sensor.py b/homeassistant/components/mysensors/sensor.py
index 6f940c5d625..dd10c203228 100644
--- a/homeassistant/components/mysensors/sensor.py
+++ b/homeassistant/components/mysensors/sensor.py
@@ -94,6 +94,7 @@ SENSORS: dict[str, SensorEntityDescription] = {
     "V_WEIGHT": SensorEntityDescription(
         key="V_WEIGHT",
         native_unit_of_measurement=MASS_KILOGRAMS,
+        device_class=SensorDeviceClass.WEIGHT,
         icon="mdi:weight-kilogram",
     ),
     "V_DISTANCE": SensorEntityDescription(