diff --git a/pysensibo/__init__.py b/pysensibo/__init__.py
index 263dd22..42919ca 100644
--- a/pysensibo/__init__.py
+++ b/pysensibo/__init__.py
@@ -11,7 +11,7 @@
 from aiohttp import ClientResponse, ClientSession, ClientTimeout
 
 from .exceptions import AuthenticationError, SensiboError
-from .model import MotionSensor, Schedules, SensiboData, SensiboDevice
+from .model import MotionSensor, PureAQI, Schedules, SensiboData, SensiboDevice
 
 APIV1 = "https://home.sensibo.com/api/v1"
 APIV2 = "https://home.sensibo.com/api/v2"
@@ -249,12 +249,12 @@ async def async_get_devices_data(self) -> SensiboData:  # noqa: C901
                     "measurements_integration", False
                 )
                 pure_prime_integration = pure_conf.get("prime_integration", False)
-            if dev["productModel"] != "pure":
-                pm25 = measure.get("pm25")
-                pm25_pure = measure.get("pm25")
+            if dev["productModel"] == "pure" and (pm25 := measure.get("pm25")):
+                pm25 = None
+                pm25_pure = PureAQI(pm25)
             else:
                 pm25 = measure.get("pm25")
-                pm25_pure = measure.get("pm25")
+                pm25_pure = None
 
             # Binary sensors for main device
             room_occupied = dev["roomIsOccupied"]
diff --git a/pysensibo/model.py b/pysensibo/model.py
index 534d1a5..82a6a49 100644
--- a/pysensibo/model.py
+++ b/pysensibo/model.py
@@ -4,6 +4,7 @@
 
 from dataclasses import dataclass
 from datetime import datetime
+from enum import IntEnum
 from typing import Any
 
 
@@ -28,7 +29,7 @@ class SensiboDevice:
     feelslike: float | None
     humidity: int | None
     pm25: float | None
-    pm25_pure: int | None
+    pm25_pure: PureAQI | None
     tvoc: int | None
     co2: int | None
     etoh: float | None
@@ -145,3 +146,14 @@ class Schedules:
     days: list[str]
     time: str
     next_utc: datetime
+
+
+class PureAQI(IntEnum):
+    """Pure AQI value.
+
+    PM2.5 values in Pure devices are AQI values.
+    """
+
+    GOOD = 1
+    MODERATE = 2
+    BAD = 3