Index: firmware/App/Monitors/Level.h
===================================================================
diff -u -r47a7b0fce13cf38919932a8662c378f4f6a8b9f3 -r50144ec3e96785cf76d5bfd22ee65029c82e732b
--- firmware/App/Monitors/Level.h	(.../Level.h)	(revision 47a7b0fce13cf38919932a8662c378f4f6a8b9f3)
+++ firmware/App/Monitors/Level.h	(.../Level.h)	(revision 50144ec3e96785cf76d5bfd22ee65029c82e732b)
@@ -7,8 +7,8 @@
 *
 * @file    Level.h
 *
-* @author  (last)      “rkallala”
-* @date    (last)      15-Jan-2026
+* @author  (last)      Varshini Nagabooshanam
+* @date    (last)      27-Jan-2026
 *
 * @author  (original)  Vinayakam Mani
 * @date    (original)  14-Oct-2024
@@ -37,7 +37,8 @@
 {
     D6_LEVL = 0,                        ///< floater switch low, medium and high status
     FIRST_DD_LEVL = D6_LEVL,            ///< First DD level
-    D63_LEVL,                           ///< bicarb level low or high status
+    D63_LEVL,                           ///< Bicarb upper level low or high status
+    D98_LEVL,                           ///< Bicarb lower level low or high status
     D46_LEVL,                           ///< Spent dialysate air separation chamber level low or high status
     LAST_DD_LEVL = D46_LEVL,            ///< Last DD level
     P25_LEVL,                           ///< FP level sensor
@@ -52,7 +53,8 @@
 /// floater and level sensor states.
 typedef enum level_States
 {
-    LEVEL_STATE_LOW = 0,                 ///< Low level
+    LEVEL_STATE_EMPTY = 0,               ///< Empty level
+    LEVEL_STATE_LOW,                     ///< Low level
     LEVEL_STATE_MEDIUM,                  ///< Medium level
     LEVEL_STATE_HIGH,                    ///< High level
     LEVEL_STATE_ILLEGAL,                 ///< Illegal level
@@ -63,7 +65,9 @@
 typedef struct
 {
     U32 d6Level;                        ///< Floater level
-    U32 d63Level;                       ///< Bicarb level
+    U32 d63Level;                       ///< Bicarb upper level
+    U32 d98Level;                       ///< Bicarb lower level
+    U32 bicarbLevel;                    ///< Bicarb chamber level combination ( D63 + D98 )
     U32 d46Level;                       ///< Spent dialysate level
 } DD_LEVEL_DATA_T;
 
@@ -78,6 +82,7 @@
 void initLevels( void );
 void execLevels( void );
 LEVEL_STATE_T getLevelStatus( LEVEL_T levelId );
+LEVEL_STATE_T getBicarbChamberLevelStatus( void );
 
 BOOL testLevelsDataPublishIntervalOverride( MESSAGE_T *message );
 BOOL testLevelStatusOverride( MESSAGE_T *message );