diff --git a/homeassistant/components/bloomsky/sensor.py b/homeassistant/components/bloomsky/sensor.py
index 29ca198c1fc4..7aa2fe9babad 100644
--- a/homeassistant/components/bloomsky/sensor.py
+++ b/homeassistant/components/bloomsky/sensor.py
@@ -6,6 +6,7 @@ from homeassistant.const import (
     AREA_SQUARE_METERS,
     CONF_MONITORED_CONDITIONS,
     DEVICE_CLASS_TEMPERATURE,
+    ELECTRIC_POTENTIAL_MILLIVOLT,
     PERCENTAGE,
     PRESSURE_INHG,
     PRESSURE_MBAR,
@@ -32,7 +33,7 @@ SENSOR_UNITS_IMPERIAL = {
     "Humidity": PERCENTAGE,
     "Pressure": PRESSURE_INHG,
     "Luminance": f"cd/{AREA_SQUARE_METERS}",
-    "Voltage": "mV",
+    "Voltage": ELECTRIC_POTENTIAL_MILLIVOLT,
 }
 
 # Metric units
@@ -41,7 +42,7 @@ SENSOR_UNITS_METRIC = {
     "Humidity": PERCENTAGE,
     "Pressure": PRESSURE_MBAR,
     "Luminance": f"cd/{AREA_SQUARE_METERS}",
-    "Voltage": "mV",
+    "Voltage": ELECTRIC_POTENTIAL_MILLIVOLT,
 }
 
 # Device class
diff --git a/homeassistant/components/homematic/sensor.py b/homeassistant/components/homematic/sensor.py
index 62f2f0ccdff6..2bc51f67896d 100644
--- a/homeassistant/components/homematic/sensor.py
+++ b/homeassistant/components/homematic/sensor.py
@@ -8,6 +8,7 @@ from homeassistant.const import (
     DEVICE_CLASS_ILLUMINANCE,
     DEVICE_CLASS_POWER,
     DEVICE_CLASS_TEMPERATURE,
+    ELECTRIC_CURRENT_MILLIAMPERE,
     ENERGY_WATT_HOUR,
     FREQUENCY_HERTZ,
     LENGTH_MILLIMETERS,
@@ -47,7 +48,7 @@ HM_UNIT_HA_CAST = {
     "ACTUAL_TEMPERATURE": TEMP_CELSIUS,
     "BRIGHTNESS": "#",
     "POWER": POWER_WATT,
-    "CURRENT": "mA",
+    "CURRENT": ELECTRIC_CURRENT_MILLIAMPERE,
     "VOLTAGE": VOLT,
     "ENERGY_COUNTER": ENERGY_WATT_HOUR,
     "GAS_POWER": VOLUME_CUBIC_METERS,
diff --git a/homeassistant/components/isy994/const.py b/homeassistant/components/isy994/const.py
index 34b89baad689..03b1fa6c66bf 100644
--- a/homeassistant/components/isy994/const.py
+++ b/homeassistant/components/isy994/const.py
@@ -48,6 +48,8 @@ from homeassistant.const import (
     CURRENCY_CENT,
     CURRENCY_DOLLAR,
     DEGREE,
+    ELECTRIC_CURRENT_MILLIAMPERE,
+    ELECTRIC_POTENTIAL_MILLIVOLT,
     ENERGY_KILO_WATT_HOUR,
     ENERGY_WATT_HOUR,
     FREQUENCY_HERTZ,
@@ -371,9 +373,9 @@ UOM_FRIENDLY_NAME = {
     "38": LENGTH_METERS,
     "39": VOLUME_FLOW_RATE_CUBIC_METERS_PER_HOUR,
     "40": SPEED_METERS_PER_SECOND,
-    "41": "mA",
+    "41": ELECTRIC_CURRENT_MILLIAMPERE,
     "42": TIME_MILLISECONDS,
-    "43": "mV",
+    "43": ELECTRIC_POTENTIAL_MILLIVOLT,
     "44": TIME_MINUTES,
     "45": TIME_MINUTES,
     "46": PRECIPITATION_MILLIMETERS_PER_HOUR,
diff --git a/homeassistant/components/mysensors/sensor.py b/homeassistant/components/mysensors/sensor.py
index 467ab7611242..f16f9e09c41d 100644
--- a/homeassistant/components/mysensors/sensor.py
+++ b/homeassistant/components/mysensors/sensor.py
@@ -11,6 +11,7 @@ from homeassistant.const import (
     DEGREE,
     DEVICE_CLASS_HUMIDITY,
     DEVICE_CLASS_TEMPERATURE,
+    ELECTRIC_POTENTIAL_MILLIVOLT,
     ELECTRICAL_CURRENT_AMPERE,
     ELECTRICAL_VOLT_AMPERE,
     ENERGY_KILO_WATT_HOUR,
@@ -61,7 +62,7 @@ SENSORS: dict[str, list[str | None] | dict[str, list[str | None]]] = {
     "V_VOLTAGE": [VOLT, "mdi:flash", None],
     "V_CURRENT": [ELECTRICAL_CURRENT_AMPERE, "mdi:flash-auto", None],
     "V_PH": ["pH", None, None],
-    "V_ORP": ["mV", None, None],
+    "V_ORP": [ELECTRIC_POTENTIAL_MILLIVOLT, None, None],
     "V_EC": [CONDUCTIVITY, None, None],
     "V_VAR": ["var", None, None],
     "V_VA": [ELECTRICAL_VOLT_AMPERE, None, None],
diff --git a/homeassistant/components/omnilogic/sensor.py b/homeassistant/components/omnilogic/sensor.py
index beec071b192d..1f8de0828687 100644
--- a/homeassistant/components/omnilogic/sensor.py
+++ b/homeassistant/components/omnilogic/sensor.py
@@ -2,6 +2,7 @@
 from homeassistant.components.sensor import DEVICE_CLASS_TEMPERATURE, SensorEntity
 from homeassistant.const import (
     CONCENTRATION_PARTS_PER_MILLION,
+    ELECTRIC_POTENTIAL_MILLIVOLT,
     MASS_GRAMS,
     PERCENTAGE,
     TEMP_CELSIUS,
@@ -342,7 +343,7 @@ SENSOR_TYPES = {
             "kind": "csad_orp",
             "device_class": None,
             "icon": "mdi:gauge",
-            "unit": "mV",
+            "unit": ELECTRIC_POTENTIAL_MILLIVOLT,
             "guard_condition": [
                 {"orp": ""},
             ],
diff --git a/homeassistant/components/ondilo_ico/sensor.py b/homeassistant/components/ondilo_ico/sensor.py
index 2428862cb316..633e03157e49 100644
--- a/homeassistant/components/ondilo_ico/sensor.py
+++ b/homeassistant/components/ondilo_ico/sensor.py
@@ -10,6 +10,7 @@ from homeassistant.const import (
     DEVICE_CLASS_BATTERY,
     DEVICE_CLASS_SIGNAL_STRENGTH,
     DEVICE_CLASS_TEMPERATURE,
+    ELECTRIC_POTENTIAL_MILLIVOLT,
     PERCENTAGE,
     TEMP_CELSIUS,
 )
@@ -28,7 +29,12 @@ SENSOR_TYPES = {
         None,
         DEVICE_CLASS_TEMPERATURE,
     ],
-    "orp": ["Oxydo Reduction Potential", "mV", "mdi:pool", None],
+    "orp": [
+        "Oxydo Reduction Potential",
+        ELECTRIC_POTENTIAL_MILLIVOLT,
+        "mdi:pool",
+        None,
+    ],
     "ph": ["pH", "", "mdi:pool", None],
     "tds": ["TDS", CONCENTRATION_PARTS_PER_MILLION, "mdi:pool", None],
     "battery": ["Battery", PERCENTAGE, None, DEVICE_CLASS_BATTERY],
diff --git a/homeassistant/components/poolsense/sensor.py b/homeassistant/components/poolsense/sensor.py
index ca79fde6b082..dd03111e85ee 100644
--- a/homeassistant/components/poolsense/sensor.py
+++ b/homeassistant/components/poolsense/sensor.py
@@ -6,6 +6,7 @@ from homeassistant.const import (
     DEVICE_CLASS_BATTERY,
     DEVICE_CLASS_TEMPERATURE,
     DEVICE_CLASS_TIMESTAMP,
+    ELECTRIC_POTENTIAL_MILLIVOLT,
     PERCENTAGE,
     TEMP_CELSIUS,
 )
@@ -15,7 +16,7 @@ from .const import ATTRIBUTION, DOMAIN
 
 SENSORS = {
     "Chlorine": {
-        "unit": "mV",
+        "unit": ELECTRIC_POTENTIAL_MILLIVOLT,
         "icon": "mdi:pool",
         "name": "Chlorine",
         "device_class": None,
@@ -40,13 +41,13 @@ SENSORS = {
         "device_class": DEVICE_CLASS_TIMESTAMP,
     },
     "Chlorine High": {
-        "unit": "mV",
+        "unit": ELECTRIC_POTENTIAL_MILLIVOLT,
         "icon": "mdi:pool",
         "name": "Chlorine High",
         "device_class": None,
     },
     "Chlorine Low": {
-        "unit": "mV",
+        "unit": ELECTRIC_POTENTIAL_MILLIVOLT,
         "icon": "mdi:pool",
         "name": "Chlorine Low",
         "device_class": None,
diff --git a/homeassistant/components/wled/const.py b/homeassistant/components/wled/const.py
index d80dbf16a603..765de4683505 100644
--- a/homeassistant/components/wled/const.py
+++ b/homeassistant/components/wled/const.py
@@ -30,9 +30,6 @@ ATTR_SPEED = "speed"
 ATTR_TARGET_BRIGHTNESS = "target_brightness"
 ATTR_UDP_PORT = "udp_port"
 
-# Units of measurement
-CURRENT_MA = "mA"
-
 # Services
 SERVICE_EFFECT = "effect"
 SERVICE_PRESET = "preset"
diff --git a/homeassistant/components/wled/sensor.py b/homeassistant/components/wled/sensor.py
index 37311e333c38..634f903c0209 100644
--- a/homeassistant/components/wled/sensor.py
+++ b/homeassistant/components/wled/sensor.py
@@ -10,6 +10,7 @@ from homeassistant.const import (
     DATA_BYTES,
     DEVICE_CLASS_SIGNAL_STRENGTH,
     DEVICE_CLASS_TIMESTAMP,
+    ELECTRIC_CURRENT_MILLIAMPERE,
     PERCENTAGE,
     SIGNAL_STRENGTH_DECIBELS_MILLIWATT,
 )
@@ -17,7 +18,7 @@ from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.util.dt import utcnow
 
-from .const import ATTR_LED_COUNT, ATTR_MAX_POWER, CURRENT_MA, DOMAIN
+from .const import ATTR_LED_COUNT, ATTR_MAX_POWER, DOMAIN
 from .coordinator import WLEDDataUpdateCoordinator
 from .models import WLEDEntity
 
@@ -47,7 +48,7 @@ class WLEDEstimatedCurrentSensor(WLEDEntity, SensorEntity):
     """Defines a WLED estimated current sensor."""
 
     _attr_icon = "mdi:power"
-    _attr_unit_of_measurement = CURRENT_MA
+    _attr_unit_of_measurement = ELECTRIC_CURRENT_MILLIAMPERE
     _attr_device_class = DEVICE_CLASS_CURRENT
 
     def __init__(self, coordinator: WLEDDataUpdateCoordinator) -> None:
diff --git a/homeassistant/const.py b/homeassistant/const.py
index 6e2b7e17ce0d..fb47ef7cb7c9 100644
--- a/homeassistant/const.py
+++ b/homeassistant/const.py
@@ -407,8 +407,10 @@ ENERGY_WATT_HOUR: Final = "Wh"
 ENERGY_KILO_WATT_HOUR: Final = "kWh"
 
 # Electrical units
+ELECTRIC_CURRENT_MILLIAMPERE: Final = "mA"
 ELECTRICAL_CURRENT_AMPERE: Final = "A"
 ELECTRICAL_VOLT_AMPERE: Final = "VA"
+ELECTRIC_POTENTIAL_MILLIVOLT: Final = "mV"
 
 # Degree units
 DEGREE: Final = "°"
diff --git a/tests/components/wled/test_sensor.py b/tests/components/wled/test_sensor.py
index 4f2b07f4f51d..e6e4b130d99e 100644
--- a/tests/components/wled/test_sensor.py
+++ b/tests/components/wled/test_sensor.py
@@ -10,17 +10,13 @@ from homeassistant.components.sensor import (
     DEVICE_CLASS_TIMESTAMP,
     DOMAIN as SENSOR_DOMAIN,
 )
-from homeassistant.components.wled.const import (
-    ATTR_LED_COUNT,
-    ATTR_MAX_POWER,
-    CURRENT_MA,
-    DOMAIN,
-)
+from homeassistant.components.wled.const import ATTR_LED_COUNT, ATTR_MAX_POWER, DOMAIN
 from homeassistant.const import (
     ATTR_DEVICE_CLASS,
     ATTR_ICON,
     ATTR_UNIT_OF_MEASUREMENT,
     DATA_BYTES,
+    ELECTRIC_CURRENT_MILLIAMPERE,
     PERCENTAGE,
     SIGNAL_STRENGTH_DECIBELS_MILLIWATT,
     STATE_UNKNOWN,
@@ -101,7 +97,9 @@ async def test_sensors(
     assert state.attributes.get(ATTR_ICON) == "mdi:power"
     assert state.attributes.get(ATTR_LED_COUNT) == 30
     assert state.attributes.get(ATTR_MAX_POWER) == 850
-    assert state.attributes.get(ATTR_UNIT_OF_MEASUREMENT) == CURRENT_MA
+    assert (
+        state.attributes.get(ATTR_UNIT_OF_MEASUREMENT) == ELECTRIC_CURRENT_MILLIAMPERE
+    )
     assert state.attributes.get(ATTR_DEVICE_CLASS) == DEVICE_CLASS_CURRENT
     assert state.state == "470"