diff --git a/homeassistant/components/flipr/sensor.py b/homeassistant/components/flipr/sensor.py
index e78031bd5cb..9cf788d7170 100644
--- a/homeassistant/components/flipr/sensor.py
+++ b/homeassistant/components/flipr/sensor.py
@@ -5,6 +5,7 @@ from homeassistant.components.sensor import (
     SensorDeviceClass,
     SensorEntity,
     SensorEntityDescription,
+    SensorStateClass,
 )
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import ELECTRIC_POTENTIAL_MILLIVOLT, TEMP_CELSIUS
@@ -20,17 +21,20 @@ SENSOR_TYPES: tuple[SensorEntityDescription, ...] = (
         name="Chlorine",
         native_unit_of_measurement=ELECTRIC_POTENTIAL_MILLIVOLT,
         icon="mdi:pool",
+        state_class=SensorStateClass.MEASUREMENT,
     ),
     SensorEntityDescription(
         key="ph",
         name="pH",
         icon="mdi:pool",
+        state_class=SensorStateClass.MEASUREMENT,
     ),
     SensorEntityDescription(
         key="temperature",
         name="Water Temp",
         device_class=SensorDeviceClass.TEMPERATURE,
         native_unit_of_measurement=TEMP_CELSIUS,
+        state_class=SensorStateClass.MEASUREMENT,
     ),
     SensorEntityDescription(
         key="date_time",
@@ -42,6 +46,7 @@ SENSOR_TYPES: tuple[SensorEntityDescription, ...] = (
         name="Red OX",
         native_unit_of_measurement=ELECTRIC_POTENTIAL_MILLIVOLT,
         icon="mdi:pool",
+        state_class=SensorStateClass.MEASUREMENT,
     ),
 )
 
diff --git a/tests/components/flipr/test_sensor.py b/tests/components/flipr/test_sensor.py
index c5ab3dc1541..30468064dae 100644
--- a/tests/components/flipr/test_sensor.py
+++ b/tests/components/flipr/test_sensor.py
@@ -5,6 +5,7 @@ from unittest.mock import patch
 from flipr_api.exceptions import FliprError
 
 from homeassistant.components.flipr.const import CONF_FLIPR_ID, DOMAIN
+from homeassistant.components.sensor import ATTR_STATE_CLASS, SensorStateClass
 from homeassistant.const import (
     ATTR_ICON,
     ATTR_UNIT_OF_MEASUREMENT,
@@ -62,30 +63,35 @@ async def test_sensors(hass: HomeAssistant) -> None:
     assert state
     assert state.attributes.get(ATTR_ICON) == "mdi:pool"
     assert state.attributes.get(ATTR_UNIT_OF_MEASUREMENT) is None
+    assert state.attributes.get(ATTR_STATE_CLASS) is SensorStateClass.MEASUREMENT
     assert state.state == "7.03"
 
     state = hass.states.get("sensor.flipr_myfliprid_water_temp")
     assert state
     assert state.attributes.get(ATTR_ICON) is None
     assert state.attributes.get(ATTR_UNIT_OF_MEASUREMENT) is TEMP_CELSIUS
+    assert state.attributes.get(ATTR_STATE_CLASS) is SensorStateClass.MEASUREMENT
     assert state.state == "10.5"
 
     state = hass.states.get("sensor.flipr_myfliprid_last_measured")
     assert state
     assert state.attributes.get(ATTR_ICON) is None
     assert state.attributes.get(ATTR_UNIT_OF_MEASUREMENT) is None
+    assert state.attributes.get(ATTR_STATE_CLASS) is None
     assert state.state == "2021-02-15T09:10:32+00:00"
 
     state = hass.states.get("sensor.flipr_myfliprid_red_ox")
     assert state
     assert state.attributes.get(ATTR_ICON) == "mdi:pool"
     assert state.attributes.get(ATTR_UNIT_OF_MEASUREMENT) == "mV"
+    assert state.attributes.get(ATTR_STATE_CLASS) is SensorStateClass.MEASUREMENT
     assert state.state == "657.58"
 
     state = hass.states.get("sensor.flipr_myfliprid_chlorine")
     assert state
     assert state.attributes.get(ATTR_ICON) == "mdi:pool"
     assert state.attributes.get(ATTR_UNIT_OF_MEASUREMENT) == "mV"
+    assert state.attributes.get(ATTR_STATE_CLASS) is SensorStateClass.MEASUREMENT
     assert state.state == "0.23654886"