diff -r fe4c711fd7f8 -r 0cb7b9f6a6f8 GUI/SensorSharpDisplay.cs
--- a/GUI/SensorSharpDisplay.cs	Sun Sep 21 21:55:36 2014 +0200
+++ b/GUI/SensorSharpDisplay.cs	Mon Sep 22 21:59:11 2014 +0200
@@ -160,7 +160,7 @@
                 case SensorType.Load: format = "{0:F0}%"; break;
                 //iMON VFD escape sequence for Celsius
                 case SensorType.Temperature: format = "{0:F0}°C"; break;
-                case SensorType.Fan: format = "{0:F0}*"; break; //RPM
+                case SensorType.Fan: format = "{0:F0}R"; break; //RPM
                 case SensorType.Flow: format = "{0:F0}L/h"; break;
                 case SensorType.Control: format = "{0:F0}%"; break;
                 case SensorType.Level: format = "{0:F0}%"; break;