Index: firmware/App/Monitors/Conductivity.c
===================================================================
diff -u -rbd896114f304304a7096b30b2a85067a64645e82 -r72de2cfa37decafea02ad19a52e44aca5d3da024
--- firmware/App/Monitors/Conductivity.c	(.../Conductivity.c)	(revision bd896114f304304a7096b30b2a85067a64645e82)
+++ firmware/App/Monitors/Conductivity.c	(.../Conductivity.c)	(revision 72de2cfa37decafea02ad19a52e44aca5d3da024)
@@ -253,13 +253,21 @@
 static void filterConductivitySensorReadings( void )
 {
     CONDUCTIVITY_SENSORS_T sensor;
-
+    F32 rawCond = 0.0F;
     for ( sensor = FIRST_DD_COND_SENSOR; sensor < NUM_OF_CONDUCTIVITY_SENSORS; sensor++ )
     {
 #ifdef __TEENSY_CONDUCTIVITY_DRIVER__
-        F32 rawCond = getTeensyConductivityValue( sensor );
+
+        if (sensor != D74_COND )
+        {
+            rawCond = getTeensyConductivityValue( sensor );
+        }
+        else
+        {
+            rawCond = getConductivityValue( sensor );
+        }
 #else
-        F32 rawCond = getConductivityValue( sensor );
+        rawCond = getConductivityValue( sensor );
 #endif
 
         // TODO - calibrate
@@ -317,15 +325,24 @@
 static void filterConductivitySensorTemperatureReadings( void )
 {
     CONDUCTIVITY_SENSORS_T sensor;
+    F32 rawTemp = 0.0F;
 
     for ( sensor = FIRST_DD_COND_SENSOR; sensor < NUM_OF_CONDUCTIVITY_SENSORS; sensor++ )
     {
+
 #ifdef __TEENSY_CONDUCTIVITY_DRIVER__
-        F32 rawTemp = getTeensyConductivityTemperatureValue( sensor );
+
+        if (sensor != D74_COND )
+        {
+            rawTemp = getTeensyConductivityTemperatureValue( sensor );
+        }
+        else
+        {
+            rawTemp = getConductivityTemperatureValue( sensor );
+        }
 #else
-        F32 rawTemp = getConductivityTemperatureValue( sensor );
+        rawCond = getConductivityTemperatureValue( sensor );
 #endif
-
         // TODO - calibrate
 
         if ( filteredConductivityTemperatureReadings[sensor].conductivityTempReadingsCount >= SIZE_OF_FLOW_ROLLING_AVG )