Index: firmware/App/Controllers/ConductivitySensors.h
===================================================================
diff -u -rb1dc3df084a8517ca1575bdbf741fecd96d56a12 -r86617288c49b57eca42cf2d0b67ade76e69f96bd
--- firmware/App/Controllers/ConductivitySensors.h	(.../ConductivitySensors.h)	(revision b1dc3df084a8517ca1575bdbf741fecd96d56a12)
+++ firmware/App/Controllers/ConductivitySensors.h	(.../ConductivitySensors.h)	(revision 86617288c49b57eca42cf2d0b67ade76e69f96bd)
@@ -32,6 +32,17 @@
 
 // ********** public definitions **********
 
+#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
 {