Index: firmware/App/Monitors/Level.c
===================================================================
diff -u -rae7a7f0dc06fd31a53b0db564d515ce4c39acf67 -rffd0828ba7d0c1ed6ae4624cfb2c502a2e7a203d
--- firmware/App/Monitors/Level.c	(.../Level.c)	(revision ae7a7f0dc06fd31a53b0db564d515ce4c39acf67)
+++ firmware/App/Monitors/Level.c	(.../Level.c)	(revision ffd0828ba7d0c1ed6ae4624cfb2c502a2e7a203d)
@@ -63,6 +63,7 @@
 static void publishLevelsData( void );
 static BOOL processLevelCount( U16 count );
 static LEVEL_STATE_T readFloaterLevelstatus( LEVEL_T levelId );
+static LEVEL_STATE_T readBicarbChamberFLevelStatus( void );
 
 /*********************************************************************//**
  * @brief
@@ -123,11 +124,11 @@
                 break;
 
             case D63_LEVL:
-                currentLevelStatus = ( processLevelCount( getFPGAD63LevelSensor() ) == 0 ? LEVEL_STATE_LOW : LEVEL_STATE_HIGH );
+                currentLevelStatus = readBicarbChamberFLevelStatus();
                 break;
 
             case D98_LEVL:
-                currentLevelStatus = ( processLevelCount( getFPGAD63LevelSensor() ) == 0 ? LEVEL_STATE_LOW : LEVEL_STATE_HIGH );
+                currentLevelStatus = readBicarbChamberFLevelStatus();
                 break;
 
             case D46_LEVL:
@@ -324,6 +325,41 @@
 
 /*********************************************************************//**
  * @brief
+ * Derive Bicarb chamber F level from the two level sensors.
+ * @details \b Inputs: FPGA level sensor data
+ * @details \b Outputs: level
+ * @return level status
+ *************************************************************************/
+static LEVEL_STATE_T readBicarbChamberFLevelStatus( void )
+{
+    BOOL upperlevel = FALSE;
+    BOOL lowerlevel = FALSE;
+
+    // These FPGA reads are raw counts
+    upperlevel = processLevelCount( getFPGAD63LevelSensor() );
+    lowerlevel = processLevelCount( getFPGAD98LevelSensor() );
+
+    if ( ( FALSE == lowerlevel ) && ( FALSE == upperlevel ) )
+    {
+        return LEVEL_STATE_LOW;
+    }
+    else if ( ( TRUE == lowerlevel ) && ( FALSE == upperlevel ) )
+    {
+        return LEVEL_STATE_MEDIUM;
+    }
+    else if ( ( TRUE == lowerlevel ) && ( TRUE == upperlevel ) )
+    {
+        return LEVEL_STATE_HIGH;
+    }
+    else
+    {
+        //upperlevel == TRUE while lowerlevel == FALSE -> illegal
+        return LEVEL_STATE_ILLEGAL;
+    }
+}
+
+/*********************************************************************//**
+ * @brief
  * The publishLevelsData function broadcasts the level data at the
  * publication interval.
  * @details \b Inputs: levelsDataPublicationCounter