Add ppm to NITROGEN_DIOXIDE units (#162983)

homeassistant/components/number/const.py

@@ -272,7 +272,7 @@ class NumberDeviceClass(StrEnum):
     NITROGEN_DIOXIDE = "nitrogen_dioxide"
     """Amount of NO2.
 
-    Unit of measurement: `ppb` (parts per billion), `μg/m³`
+    Unit of measurement: `ppb` (parts per billion), `ppm` (parts per million), `μg/m³`
     """
 
     NITROGEN_MONOXIDE = "nitrogen_monoxide"
@@ -544,6 +544,7 @@ DEVICE_CLASS_UNITS: dict[NumberDeviceClass, set[type[StrEnum] | str | None]] = {
     NumberDeviceClass.MOISTURE: {PERCENTAGE},
     NumberDeviceClass.NITROGEN_DIOXIDE: {
         CONCENTRATION_PARTS_PER_BILLION,
+        CONCENTRATION_PARTS_PER_MILLION,
         CONCENTRATION_MICROGRAMS_PER_CUBIC_METER,
     },
     NumberDeviceClass.NITROGEN_MONOXIDE: {

homeassistant/components/sensor/const.py

@@ -286,7 +286,7 @@ class SensorDeviceClass(StrEnum):
     NITROGEN_DIOXIDE = "nitrogen_dioxide"
     """Amount of NO2.
 
-    Unit of measurement: `ppb` (parts per billion), `μg/m³`
+    Unit of measurement: `ppb` (parts per billion), `ppm` (parts per million), `μg/m³`
     """
 
     NITROGEN_MONOXIDE = "nitrogen_monoxide"
@@ -639,6 +639,7 @@ DEVICE_CLASS_UNITS: dict[SensorDeviceClass, set[type[StrEnum] | str | None]] = {
     SensorDeviceClass.MOISTURE: {PERCENTAGE},
     SensorDeviceClass.NITROGEN_DIOXIDE: {
         CONCENTRATION_PARTS_PER_BILLION,
+        CONCENTRATION_PARTS_PER_MILLION,
         CONCENTRATION_MICROGRAMS_PER_CUBIC_METER,
     },
     SensorDeviceClass.NITROGEN_MONOXIDE: {

homeassistant/util/unit_conversion.py

@@ -494,12 +494,14 @@ class NitrogenDioxideConcentrationConverter(BaseUnitConverter):
     UNIT_CLASS = "nitrogen_dioxide"
     _UNIT_CONVERSION: dict[str | None, float] = {
         CONCENTRATION_PARTS_PER_BILLION: 1e9,
+        CONCENTRATION_PARTS_PER_MILLION: 1e6,
         CONCENTRATION_MICROGRAMS_PER_CUBIC_METER: (
             _NITROGEN_DIOXIDE_MOLAR_MASS / _AMBIENT_IDEAL_GAS_MOLAR_VOLUME * 1e6
         ),
     }
     VALID_UNITS = {
         CONCENTRATION_PARTS_PER_BILLION,
+        CONCENTRATION_PARTS_PER_MILLION,
         CONCENTRATION_MICROGRAMS_PER_CUBIC_METER,
     }
 

tests/util/test_unit_conversion.py

@@ -413,6 +413,30 @@ _CONVERTED_VALUE: dict[
             62.744976,
             CONCENTRATION_PARTS_PER_BILLION,
         ),
+        (
+            1,
+            CONCENTRATION_PARTS_PER_MILLION,
+            1912.503,
+            CONCENTRATION_MICROGRAMS_PER_CUBIC_METER,
+        ),
+        (
+            120,
+            CONCENTRATION_MICROGRAMS_PER_CUBIC_METER,
+            0.062744976,
+            CONCENTRATION_PARTS_PER_MILLION,
+        ),
+        (
+            100,
+            CONCENTRATION_PARTS_PER_BILLION,
+            0.1,
+            CONCENTRATION_PARTS_PER_MILLION,
+        ),
+        (
+            0.5,
+            CONCENTRATION_PARTS_PER_MILLION,
+            500,
+            CONCENTRATION_PARTS_PER_BILLION,
+        ),
     ],
     NitrogenMonoxideConcentrationConverter: [
         (