diff --git a/src/sensor_state_data/sensor/device_class.py b/src/sensor_state_data/sensor/device_class.py
index f7cb870..afbeabd 100644
--- a/src/sensor_state_data/sensor/device_class.py
+++ b/src/sensor_state_data/sensor/device_class.py
@@ -18,6 +18,9 @@ class SensorDeviceClass(BaseDeviceClass):
     # % of battery that is left
     BATTERY = "battery"
 
+    # blood glucose concentration (mg/dL, mmol/L)
+    BLOOD_GLUCOSE_CONCENTRATION = "blood_glucose_concentration"
+
     # ppm (parts per million) Carbon Monoxide gas concentration
     CO = "carbon_monoxide"
 
@@ -144,6 +147,9 @@ class SensorDeviceClass(BaseDeviceClass):
     # signal strength (dB/dBm)
     SIGNAL_STRENGTH = "signal_strength"
 
+    # sound pressure (dB, dBA)
+    SOUND_PRESSURE = "sound_pressure"
+
     # specific gravity
     SPECIFIC_GRAVITY = "specific_gravity"
 
@@ -168,6 +174,9 @@ class SensorDeviceClass(BaseDeviceClass):
     # Amount of VOC (µg/m³)
     VOLATILE_ORGANIC_COMPOUNDS = "volatile_organic_compounds"
 
+    # Ratio of VOC (ppm, ppb)
+    VOLATILE_ORGANIC_COMPOUNDS_PARTS = "volatile_organic_compounds_parts"
+
     # voltage (V)
     VOLTAGE = "voltage"
 
diff --git a/tests/test_sensor_device_class_health_air.py b/tests/test_sensor_device_class_health_air.py
new file mode 100644
index 0000000..f7013ba
--- /dev/null
+++ b/tests/test_sensor_device_class_health_air.py
@@ -0,0 +1,24 @@
+"""Pin the HA interop string values for recently added sensor device classes.
+
+These string values are the contract with Home Assistant. They must match HA's
+``SensorDeviceClass`` exactly, so drift is caught here rather than downstream.
+"""
+
+from sensor_state_data import SensorDeviceClass
+
+
+def test_blood_glucose_concentration_value():
+    assert (
+        SensorDeviceClass.BLOOD_GLUCOSE_CONCENTRATION == "blood_glucose_concentration"
+    )
+
+
+def test_sound_pressure_value():
+    assert SensorDeviceClass.SOUND_PRESSURE == "sound_pressure"
+
+
+def test_volatile_organic_compounds_parts_value():
+    assert (
+        SensorDeviceClass.VOLATILE_ORGANIC_COMPOUNDS_PARTS
+        == "volatile_organic_compounds_parts"
+    )