diff --git a/homeassistant/components/bmw_connected_drive/binary_sensor.py b/homeassistant/components/bmw_connected_drive/binary_sensor.py
index ee89873e8fe..5cc3964ccee 100644
--- a/homeassistant/components/bmw_connected_drive/binary_sensor.py
+++ b/homeassistant/components/bmw_connected_drive/binary_sensor.py
@@ -3,7 +3,10 @@ import logging
 
 from bimmer_connected.state import ChargingState, LockState
 
-from homeassistant.components.binary_sensor import BinarySensorEntity
+from homeassistant.components.binary_sensor import (
+    DEVICE_CLASS_OPENING,
+    BinarySensorEntity,
+)
 from homeassistant.const import ATTR_ATTRIBUTION, LENGTH_KILOMETERS
 
 from . import DOMAIN as BMW_DOMAIN
@@ -12,8 +15,8 @@ from .const import ATTRIBUTION
 _LOGGER = logging.getLogger(__name__)
 
 SENSOR_TYPES = {
-    "lids": ["Doors", "opening", "mdi:car-door-lock"],
-    "windows": ["Windows", "opening", "mdi:car-door"],
+    "lids": ["Doors", DEVICE_CLASS_OPENING, "mdi:car-door-lock"],
+    "windows": ["Windows", DEVICE_CLASS_OPENING, "mdi:car-door"],
     "door_lock_state": ["Door lock state", "lock", "mdi:car-key"],
     "lights_parking": ["Parking lights", "light", "mdi:car-parking-lights"],
     "condition_based_services": ["Condition based services", "problem", "mdi:wrench"],
diff --git a/homeassistant/components/concord232/binary_sensor.py b/homeassistant/components/concord232/binary_sensor.py
index 5ff75526b27..3b2e980b777 100644
--- a/homeassistant/components/concord232/binary_sensor.py
+++ b/homeassistant/components/concord232/binary_sensor.py
@@ -7,6 +7,7 @@ import requests
 import voluptuous as vol
 
 from homeassistant.components.binary_sensor import (
+    DEVICE_CLASS_OPENING,
     DEVICE_CLASS_SAFETY,
     DEVICE_CLASS_SMOKE,
     DEVICE_CLASSES,
@@ -94,7 +95,7 @@ def get_opening_type(zone):
         return DEVICE_CLASS_SMOKE
     if "WATER" in zone["name"]:
         return "water"
-    return "opening"
+    return DEVICE_CLASS_OPENING
 
 
 class Concord232ZoneSensor(BinarySensorEntity):
diff --git a/homeassistant/components/danfoss_air/binary_sensor.py b/homeassistant/components/danfoss_air/binary_sensor.py
index 7f6876a709b..9d3123185c4 100644
--- a/homeassistant/components/danfoss_air/binary_sensor.py
+++ b/homeassistant/components/danfoss_air/binary_sensor.py
@@ -1,7 +1,10 @@
 """Support for the for Danfoss Air HRV binary sensors."""
 from pydanfossair.commands import ReadCommand
 
-from homeassistant.components.binary_sensor import BinarySensorEntity
+from homeassistant.components.binary_sensor import (
+    DEVICE_CLASS_OPENING,
+    BinarySensorEntity,
+)
 
 from . import DOMAIN as DANFOSS_AIR_DOMAIN
 
@@ -11,7 +14,7 @@ def setup_platform(hass, config, add_entities, discovery_info=None):
     data = hass.data[DANFOSS_AIR_DOMAIN]
 
     sensors = [
-        ["Danfoss Air Bypass Active", ReadCommand.bypass, "opening"],
+        ["Danfoss Air Bypass Active", ReadCommand.bypass, DEVICE_CLASS_OPENING],
         ["Danfoss Air Away Mode Active", ReadCommand.away_mode, None],
     ]
 
diff --git a/homeassistant/components/egardia/binary_sensor.py b/homeassistant/components/egardia/binary_sensor.py
index 4be443a36f4..f4bb5097625 100644
--- a/homeassistant/components/egardia/binary_sensor.py
+++ b/homeassistant/components/egardia/binary_sensor.py
@@ -1,7 +1,10 @@
 """Interfaces with Egardia/Woonveilig alarm control panel."""
 import logging
 
-from homeassistant.components.binary_sensor import BinarySensorEntity
+from homeassistant.components.binary_sensor import (
+    DEVICE_CLASS_OPENING,
+    BinarySensorEntity,
+)
 from homeassistant.const import STATE_OFF, STATE_ON
 
 from . import ATTR_DISCOVER_DEVICES, EGARDIA_DEVICE
@@ -10,7 +13,7 @@ _LOGGER = logging.getLogger(__name__)
 
 EGARDIA_TYPE_TO_DEVICE_CLASS = {
     "IR Sensor": "motion",
-    "Door Contact": "opening",
+    "Door Contact": DEVICE_CLASS_OPENING,
     "IR": "motion",
 }
 
diff --git a/homeassistant/components/hive/binary_sensor.py b/homeassistant/components/hive/binary_sensor.py
index 27c648f554b..bc71939bf6a 100644
--- a/homeassistant/components/hive/binary_sensor.py
+++ b/homeassistant/components/hive/binary_sensor.py
@@ -1,9 +1,15 @@
 """Support for the Hive binary sensors."""
-from homeassistant.components.binary_sensor import BinarySensorEntity
+from homeassistant.components.binary_sensor import (
+    DEVICE_CLASS_OPENING,
+    BinarySensorEntity,
+)
 
 from . import DATA_HIVE, DOMAIN, HiveEntity
 
-DEVICETYPE_DEVICE_CLASS = {"motionsensor": "motion", "contactsensor": "opening"}
+DEVICETYPE_DEVICE_CLASS = {
+    "motionsensor": "motion",
+    "contactsensor": DEVICE_CLASS_OPENING,
+}
 
 
 def setup_platform(hass, config, add_entities, discovery_info=None):
diff --git a/homeassistant/components/nest/binary_sensor.py b/homeassistant/components/nest/binary_sensor.py
index d4c9b6ca35d..35acab6f504 100644
--- a/homeassistant/components/nest/binary_sensor.py
+++ b/homeassistant/components/nest/binary_sensor.py
@@ -3,6 +3,7 @@ from itertools import chain
 import logging
 
 from homeassistant.components.binary_sensor import (
+    DEVICE_CLASS_OCCUPANCY,
     DEVICE_CLASS_SOUND,
     BinarySensorEntity,
 )
@@ -24,7 +25,7 @@ CLIMATE_BINARY_TYPES = {
 CAMERA_BINARY_TYPES = {
     "motion_detected": "motion",
     "sound_detected": DEVICE_CLASS_SOUND,
-    "person_detected": "occupancy",
+    "person_detected": DEVICE_CLASS_OCCUPANCY,
 }
 
 STRUCTURE_BINARY_TYPES = {"away": None}
diff --git a/homeassistant/components/nx584/binary_sensor.py b/homeassistant/components/nx584/binary_sensor.py
index 127ce02b371..2db3531f879 100644
--- a/homeassistant/components/nx584/binary_sensor.py
+++ b/homeassistant/components/nx584/binary_sensor.py
@@ -8,6 +8,7 @@ import requests
 import voluptuous as vol
 
 from homeassistant.components.binary_sensor import (
+    DEVICE_CLASS_OPENING,
     DEVICE_CLASSES,
     PLATFORM_SCHEMA,
     BinarySensorEntity,
@@ -59,7 +60,9 @@ def setup_platform(hass, config, add_entities, discovery_info=None):
         return False
 
     zone_sensors = {
-        zone["number"]: NX584ZoneSensor(zone, zone_types.get(zone["number"], "opening"))
+        zone["number"]: NX584ZoneSensor(
+            zone, zone_types.get(zone["number"], DEVICE_CLASS_OPENING)
+        )
         for zone in zones
         if zone["number"] not in exclude
     }
diff --git a/homeassistant/components/ring/binary_sensor.py b/homeassistant/components/ring/binary_sensor.py
index fa303b94378..876caad3f85 100644
--- a/homeassistant/components/ring/binary_sensor.py
+++ b/homeassistant/components/ring/binary_sensor.py
@@ -2,7 +2,10 @@
 from datetime import datetime
 import logging
 
-from homeassistant.components.binary_sensor import BinarySensorEntity
+from homeassistant.components.binary_sensor import (
+    DEVICE_CLASS_OCCUPANCY,
+    BinarySensorEntity,
+)
 from homeassistant.core import callback
 
 from . import DOMAIN
@@ -12,7 +15,7 @@ _LOGGER = logging.getLogger(__name__)
 
 # Sensor types: Name, category, device_class
 SENSOR_TYPES = {
-    "ding": ["Ding", ["doorbots", "authorized_doorbots"], "occupancy"],
+    "ding": ["Ding", ["doorbots", "authorized_doorbots"], DEVICE_CLASS_OCCUPANCY],
     "motion": ["Motion", ["doorbots", "authorized_doorbots", "stickup_cams"], "motion"],
 }
 
diff --git a/homeassistant/components/skybell/binary_sensor.py b/homeassistant/components/skybell/binary_sensor.py
index a5c6681eb2b..38cf0a98f40 100644
--- a/homeassistant/components/skybell/binary_sensor.py
+++ b/homeassistant/components/skybell/binary_sensor.py
@@ -4,7 +4,11 @@ import logging
 
 import voluptuous as vol
 
-from homeassistant.components.binary_sensor import PLATFORM_SCHEMA, BinarySensorEntity
+from homeassistant.components.binary_sensor import (
+    DEVICE_CLASS_OCCUPANCY,
+    PLATFORM_SCHEMA,
+    BinarySensorEntity,
+)
 from homeassistant.const import CONF_ENTITY_NAMESPACE, CONF_MONITORED_CONDITIONS
 import homeassistant.helpers.config_validation as cv
 
@@ -16,7 +20,7 @@ SCAN_INTERVAL = timedelta(seconds=5)
 
 # Sensor types: Name, device_class, event
 SENSOR_TYPES = {
-    "button": ["Button", "occupancy", "device:sensor:button"],
+    "button": ["Button", DEVICE_CLASS_OCCUPANCY, "device:sensor:button"],
     "motion": ["Motion", "motion", "device:sensor:motion"],
 }
 
diff --git a/homeassistant/components/sleepiq/binary_sensor.py b/homeassistant/components/sleepiq/binary_sensor.py
index 39ae3e7c658..cfbd6f576be 100644
--- a/homeassistant/components/sleepiq/binary_sensor.py
+++ b/homeassistant/components/sleepiq/binary_sensor.py
@@ -1,5 +1,8 @@
 """Support for SleepIQ sensors."""
-from homeassistant.components.binary_sensor import BinarySensorEntity
+from homeassistant.components.binary_sensor import (
+    DEVICE_CLASS_OCCUPANCY,
+    BinarySensorEntity,
+)
 
 from . import SleepIQSensor
 from .const import DOMAIN, IS_IN_BED, SENSOR_TYPES, SIDES
@@ -39,7 +42,7 @@ class IsInBedBinarySensor(SleepIQSensor, BinarySensorEntity):
     @property
     def device_class(self):
         """Return the class of this sensor."""
-        return "occupancy"
+        return DEVICE_CLASS_OCCUPANCY
 
     def update(self):
         """Get the latest data from SleepIQ and updates the states."""
diff --git a/homeassistant/components/smartthings/binary_sensor.py b/homeassistant/components/smartthings/binary_sensor.py
index 4e555aece22..baeac063598 100644
--- a/homeassistant/components/smartthings/binary_sensor.py
+++ b/homeassistant/components/smartthings/binary_sensor.py
@@ -4,6 +4,7 @@ from typing import Optional, Sequence
 from pysmartthings import Attribute, Capability
 
 from homeassistant.components.binary_sensor import (
+    DEVICE_CLASS_OPENING,
     DEVICE_CLASS_SOUND,
     BinarySensorEntity,
 )
@@ -24,13 +25,13 @@ CAPABILITY_TO_ATTRIB = {
 }
 ATTRIB_TO_CLASS = {
     Attribute.acceleration: "moving",
-    Attribute.contact: "opening",
+    Attribute.contact: DEVICE_CLASS_OPENING,
     Attribute.filter_status: "problem",
     Attribute.motion: "motion",
     Attribute.presence: "presence",
     Attribute.sound: DEVICE_CLASS_SOUND,
     Attribute.tamper: "problem",
-    Attribute.valve: "opening",
+    Attribute.valve: DEVICE_CLASS_OPENING,
     Attribute.water: "moisture",
 }
 
diff --git a/homeassistant/components/spc/binary_sensor.py b/homeassistant/components/spc/binary_sensor.py
index faa803b25dd..4ee8ffad77e 100644
--- a/homeassistant/components/spc/binary_sensor.py
+++ b/homeassistant/components/spc/binary_sensor.py
@@ -4,6 +4,7 @@ import logging
 from pyspcwebgw.const import ZoneInput, ZoneType
 
 from homeassistant.components.binary_sensor import (
+    DEVICE_CLASS_OPENING,
     DEVICE_CLASS_SMOKE,
     BinarySensorEntity,
 )
@@ -18,7 +19,7 @@ _LOGGER = logging.getLogger(__name__)
 def _get_device_class(zone_type):
     return {
         ZoneType.ALARM: "motion",
-        ZoneType.ENTRY_EXIT: "opening",
+        ZoneType.ENTRY_EXIT: DEVICE_CLASS_OPENING,
         ZoneType.FIRE: DEVICE_CLASS_SMOKE,
         ZoneType.TECHNICAL: "power",
     }.get(zone_type)
diff --git a/homeassistant/components/wink/binary_sensor.py b/homeassistant/components/wink/binary_sensor.py
index d4443f31ab6..742ed9d020d 100644
--- a/homeassistant/components/wink/binary_sensor.py
+++ b/homeassistant/components/wink/binary_sensor.py
@@ -4,6 +4,8 @@ import logging
 import pywink
 
 from homeassistant.components.binary_sensor import (
+    DEVICE_CLASS_OCCUPANCY,
+    DEVICE_CLASS_OPENING,
     DEVICE_CLASS_SMOKE,
     DEVICE_CLASS_SOUND,
     DEVICE_CLASS_VIBRATION,
@@ -24,8 +26,8 @@ SENSOR_TYPES = {
     "loudness": DEVICE_CLASS_SOUND,
     "motion": "motion",
     "noise": DEVICE_CLASS_SOUND,
-    "opened": "opening",
-    "presence": "occupancy",
+    "opened": DEVICE_CLASS_OPENING,
+    "presence": DEVICE_CLASS_OCCUPANCY,
     "smoke_detected": DEVICE_CLASS_SMOKE,
     "vibration": DEVICE_CLASS_VIBRATION,
 }
diff --git a/homeassistant/components/xiaomi_aqara/binary_sensor.py b/homeassistant/components/xiaomi_aqara/binary_sensor.py
index fecdfd91a75..f8d1622ae92 100644
--- a/homeassistant/components/xiaomi_aqara/binary_sensor.py
+++ b/homeassistant/components/xiaomi_aqara/binary_sensor.py
@@ -1,7 +1,10 @@
 """Support for Xiaomi aqara binary sensors."""
 import logging
 
-from homeassistant.components.binary_sensor import BinarySensorEntity
+from homeassistant.components.binary_sensor import (
+    DEVICE_CLASS_OPENING,
+    BinarySensorEntity,
+)
 from homeassistant.core import callback
 from homeassistant.helpers.event import async_call_later
 
@@ -299,7 +302,7 @@ class XiaomiDoorSensor(XiaomiBinarySensor):
             "Door Window Sensor",
             xiaomi_hub,
             data_key,
-            "opening",
+            DEVICE_CLASS_OPENING,
             config_entry,
         )