diff --git a/homeassistant/components/purpleair/sensor.py b/homeassistant/components/purpleair/sensor.py
index a85a23b6144..3a2e42e63cb 100644
--- a/homeassistant/components/purpleair/sensor.py
+++ b/homeassistant/components/purpleair/sensor.py
@@ -132,7 +132,7 @@ SENSOR_DESCRIPTIONS = [
         entity_registry_enabled_default=False,
         native_unit_of_measurement=SIGNAL_STRENGTH_DECIBELS_MILLIWATT,
         state_class=SensorStateClass.MEASUREMENT,
-        value_fn=lambda sensor: sensor.pressure,
+        value_fn=lambda sensor: sensor.rssi,
     ),
     PurpleAirSensorEntityDescription(
         key="temperature",