Index: firmware/App/Drivers/FlowSensor.h
===================================================================
diff -u -r99498a5bab0a1f4c706376feceadc66df6d1c22e -r863f8f88c73ee5dd285242f6e131a14862b4f5c4
--- firmware/App/Drivers/FlowSensor.h	(.../FlowSensor.h)	(revision 99498a5bab0a1f4c706376feceadc66df6d1c22e)
+++ firmware/App/Drivers/FlowSensor.h	(.../FlowSensor.h)	(revision 863f8f88c73ee5dd285242f6e131a14862b4f5c4)
@@ -31,6 +31,9 @@
 
 // ********** public definitions **********
 
+#define MIN_FLOW                    0                   ///< Minimum flow value used for overriding
+#define MAX_FLOW                    2000                ///< Maximum flow value used for overriding
+
 /// Enumeration of flow sensors handled by this unit.
 typedef enum FlowSensors
 {
@@ -44,7 +47,7 @@
 
 void initFlowSensor( void );
 void readFlowSensors( void );
-F32  getFlowRate( FLOW_SENSORS_T sensor );
+S32  getFlowRate( FLOW_SENSORS_T sensor );
 F32  getFlowTemperature( FLOW_SENSORS_T sensor );
 
 BOOL testFlowSensorReadingsOverride( MESSAGE_T *message );