Index: firmware/App/Controllers/ConductivitySensors.h
===================================================================
diff -u -r63215f2052a66ecb3e0355bad0ec99b4db335fff -r9438614daab0edede947e39a9d563fce8f66225e
--- firmware/App/Controllers/ConductivitySensors.h	(.../ConductivitySensors.h)	(revision 63215f2052a66ecb3e0355bad0ec99b4db335fff)
+++ firmware/App/Controllers/ConductivitySensors.h	(.../ConductivitySensors.h)	(revision 9438614daab0edede947e39a9d563fce8f66225e)
@@ -45,9 +45,18 @@
  */
 
 // ********** public definitions **********
-#define ACID_NORMAL_CONDUCTIVITY                        11645.05                                    ///< Acid normal operation theoretical conductivity.
-#define BICARB_NORMAL_CONDUCTIVITY                      13734.88                                    ///< Bicarb normal operation theoretical conductivity.
 
+#define MIN_ACID_CONCENTRATE_CONDUCTIVITY               11000                                       ///< Minimum conductivity for acid concentrate.
+#define MAX_ACID_CONCENTRATE_CONDUCTIVITY               11850                                       ///< Maximum conductivity for acid concentrate.
+
+#define MIN_BICARB_CONCENTRATE_CONDUCTIVITY             2000                                        ///< Minimum conductivity for bicarbonate concentrate.
+#define MAX_BICARB_CONCENTRATE_CONDUCTIVITY             3000                                        ///< Maximum conductivity for bicarbonate concentrate.
+
+///< Minimum conductivity value for dialysate solution.
+#define MIN_DIALYSATE_CONDUCTIVITY                      ( MIN_ACID_CONCENTRATE_CONDUCTIVITY + MIN_BICARB_CONCENTRATE_CONDUCTIVITY )
+///< Maximum conductivity value for dialysate solution.
+#define MAX_DIALYSATE_CONDUCTIVITY                      ( MAX_ACID_CONCENTRATE_CONDUCTIVITY + MAX_BICARB_CONCENTRATE_CONDUCTIVITY )
+
 /// Enumeration of conductivity sensors.
 typedef enum ConductivitySensors
 {