diff --git a/custom_components/plant/sensor.py b/custom_components/plant/sensor.py
index 5ca1f12..67c1180 100644
--- a/custom_components/plant/sensor.py
+++ b/custom_components/plant/sensor.py
@@ -354,7 +354,7 @@ def __init__(
         self._external_sensor = config.data[FLOW_PLANT_INFO].get(
             FLOW_SENSOR_CONDUCTIVITY
         )
-        self._attr_native_unit_of_measurement = UnitOfConductivity.MICROSIEMENS
+        self._attr_native_unit_of_measurement = UnitOfConductivity.MICROSIEMENS_PER_CM
 
         super().__init__(hass, config, plantdevice)