Index: firmware/App/Controllers/TemperatureSensors.c
===================================================================
diff -u -r6edc3ea8adbf031fe3b1522d3a14d78f238a9f30 -r3f44ec8f7a0bb4245c899abd93b23697c883024c
--- firmware/App/Controllers/TemperatureSensors.c	(.../TemperatureSensors.c)	(revision 6edc3ea8adbf031fe3b1522d3a14d78f238a9f30)
+++ firmware/App/Controllers/TemperatureSensors.c	(.../TemperatureSensors.c)	(revision 3f44ec8f7a0bb4245c899abd93b23697c883024c)
@@ -182,6 +182,7 @@
                                                      TEMP_SENSORS_DATA_PUBLISH_INTERVAL, 0, 0 };                ///< Temperature sensors publish time interval override.
 static DG_TEMP_SENSORS_CAL_RECORD_T tempSensorCalRecord;                                                        ///< Temperature sensors calibration record.
 static DIAL_TEMP_MOVING_AVG_DATA_T dialTempMovingAvgData[ NUM_OF_DIAL_TEMPS ];                                  ///< Dialysate temperature moving average data.
+static BOOL tempDriftEventCheck;
 static const F32 POSITIVE_TC_EXP_A0 = 0.118597600000E0;                                                         ///< K TC positive temperature exponent coefficient A0.
 static const F32 POSITIVE_TC_EXP_A1 = -0.118343200000E-3;                                                       ///< K TC positive temperature exponent coefficient A1.
 static const F32 POSITIVE_TC_EXP_A2 = 0.126968600000E3;                                                         ///< K TC positive temperature exponent coefficient A2.
@@ -244,6 +245,7 @@
     baroConvConsts.coeffsCRC.data          = 0;
     baroConvConsts.hasCRCBeenChecked       = FALSE;
     baroConvConsts.waitForCoeffStartTimeMS = 0;
+    tempDriftEventCheck                    = FALSE;
 
     /* NOTE: The temperature sensors do not have conversion coefficient.
      *       The conversion coefficients are used for the heaters internal temperature sensors and
@@ -635,6 +637,19 @@
                     BOOL isDriftOut = ( fabs( TDi - TRo ) > driftC ? TRUE : FALSE );
 
                     checkPersistentAlarm( ALARM_ID_DG_DIALYSATE_TEMPERATURE_SENSORS_OUT_OF_RANGE, isDriftOut, fabs( TDi - TRo ), driftC );
+
+                    if ( ( FALSE == tempDriftEventCheck ) && ( TRUE == isDriftOut ) )
+                    {
+                        // Send event only condition trigger, not continuously.
+                        tempDriftEventCheck = TRUE;
+                        SEND_EVENT_WITH_2_U32_DATA(DG_EVENT_TEMPERATURE_DRIFT, TDi, TRo)
+                    }
+
+                    if ( ( TRUE == tempDriftEventCheck ) && ( FALSE == isDriftOut ) )
+                    {
+                        tempDriftEventCheck = FALSE;
+                    }
+
                 }
                 break;