diff --git a/homeassistant/components/sensibo/sensor.py b/homeassistant/components/sensibo/sensor.py
index e9d9447ad81..3fa764a8757 100644
--- a/homeassistant/components/sensibo/sensor.py
+++ b/homeassistant/components/sensibo/sensor.py
@@ -132,6 +132,7 @@ PURE_SENSOR_TYPES: tuple[SensiboDeviceSensorEntityDescription, ...] = (
         icon="mdi:air-filter",
         value_fn=lambda data: data.pure_sensitivity,
         extra_fn=None,
+        device_class="sensibo__sensitivity",
     ),
     FILTER_LAST_RESET_DESCRIPTION,
 )