diff --git a/spaceapi/sensors.py b/spaceapi/sensors.py
--- a/spaceapi/sensors.py
+++ b/spaceapi/sensors.py
@@ -34,13 +34,16 @@ def set_value(data, key):
 
     try:
         index = fuzzy_list_find(active["sensors"][key], subkey, data[subkey])
+        if key == "barometer":
+            data["unit"] == "hPA"
         active["sensors"][key][index].update(data)
     except ValueError:
         active["sensors"][key].append(data)
 
     try:
-
         index_v14 = fuzzy_list_find(active_v14["sensors"][key], subkey, data[subkey])
+        if key == "barometer":
+            data["unit"] = "hPa"
         active_v14["sensors"][key][index].update(data)
     except ValueError:
         active_v14["sensors"][key].append(data)