diff --git a/applications/foobot/monitor/foobotmonitor.lps b/applications/foobot/monitor/foobotmonitor.lps
index 84486b54b..91cff6786 100644
--- a/applications/foobot/monitor/foobotmonitor.lps
+++ b/applications/foobot/monitor/foobotmonitor.lps
@@ -3,14 +3,14 @@
   <ProjectSession>
     <PathDelim Value="\"/>
     <Version Value="10"/>
-    <BuildModes Active="linux64"/>
+    <BuildModes Active="win32GTK2"/>
     <Units Count="25">
       <Unit0>
         <Filename Value="foobotmonitor.lpr"/>
         <IsPartOfProject Value="True"/>
         <EditorIndex Value="8"/>
         <CursorPos X="33" Y="25"/>
-        <UsageCount Value="72"/>
+        <UsageCount Value="74"/>
         <Loaded Value="True"/>
       </Unit0>
       <Unit1>
@@ -20,9 +20,9 @@
         <HasResources Value="True"/>
         <ResourceBaseClass Value="Form"/>
         <IsVisibleTab Value="True"/>
-        <TopLine Value="23"/>
-        <CursorPos X="72" Y="39"/>
-        <UsageCount Value="72"/>
+        <TopLine Value="591"/>
+        <CursorPos X="58" Y="613"/>
+        <UsageCount Value="74"/>
         <Loaded Value="True"/>
         <LoadedDesigner Value="True"/>
       </Unit1>
@@ -34,7 +34,7 @@
         <ResourceBaseClass Value="Form"/>
         <EditorIndex Value="2"/>
         <CursorPos X="2" Y="20"/>
-        <UsageCount Value="62"/>
+        <UsageCount Value="64"/>
         <Loaded Value="True"/>
       </Unit2>
       <Unit3>
@@ -44,7 +44,7 @@
         <WindowIndex Value="-1"/>
         <TopLine Value="-1"/>
         <CursorPos X="-1" Y="-1"/>
-        <UsageCount Value="54"/>
+        <UsageCount Value="56"/>
       </Unit3>
       <Unit4>
         <Filename Value="..\foobot_objects.pas"/>
@@ -53,7 +53,7 @@
         <WindowIndex Value="-1"/>
         <TopLine Value="-1"/>
         <CursorPos X="-1" Y="-1"/>
-        <UsageCount Value="54"/>
+        <UsageCount Value="56"/>
       </Unit4>
       <Unit5>
         <Filename Value="..\foobot_utility.pas"/>
@@ -61,7 +61,7 @@
         <EditorIndex Value="5"/>
         <TopLine Value="65"/>
         <CursorPos X="18" Y="83"/>
-        <UsageCount Value="72"/>
+        <UsageCount Value="74"/>
         <Loaded Value="True"/>
       </Unit5>
       <Unit6>
@@ -71,21 +71,21 @@
         <WindowIndex Value="-1"/>
         <TopLine Value="-1"/>
         <CursorPos X="-1" Y="-1"/>
-        <UsageCount Value="54"/>
+        <UsageCount Value="56"/>
       </Unit6>
       <Unit7>
         <Filename Value="..\latest_stable\foobot_httpclient.pas"/>
         <EditorIndex Value="3"/>
         <TopLine Value="43"/>
         <CursorPos X="47" Y="13"/>
-        <UsageCount Value="53"/>
+        <UsageCount Value="54"/>
         <Loaded Value="True"/>
       </Unit7>
       <Unit8>
         <Filename Value="..\latest_stable\foobot_objects.pas"/>
         <EditorIndex Value="7"/>
         <CursorPos X="32" Y="61"/>
-        <UsageCount Value="53"/>
+        <UsageCount Value="54"/>
         <Loaded Value="True"/>
       </Unit8>
       <Unit9>
@@ -121,7 +121,7 @@
         <EditorIndex Value="4"/>
         <TopLine Value="284"/>
         <CursorPos X="38" Y="313"/>
-        <UsageCount Value="33"/>
+        <UsageCount Value="34"/>
         <Loaded Value="True"/>
       </Unit13>
       <Unit14>
@@ -191,16 +191,16 @@
       <Unit23>
         <Filename Value="C:\trunklatest\fpc\packages\rtl-objpas\src\inc\dateutil.inc"/>
         <EditorIndex Value="6"/>
-        <TopLine Value="93"/>
-        <CursorPos X="19" Y="110"/>
-        <UsageCount Value="22"/>
+        <TopLine Value="381"/>
+        <CursorPos X="24" Y="409"/>
+        <UsageCount Value="23"/>
         <Loaded Value="True"/>
       </Unit23>
       <Unit24>
         <Filename Value="..\latest_stable\udataform.pas"/>
         <EditorIndex Value="1"/>
         <TopLine Value="70"/>
-        <UsageCount Value="22"/>
+        <UsageCount Value="23"/>
         <Loaded Value="True"/>
       </Unit24>
     </Units>
diff --git a/applications/foobot/monitor/umainform.lfm b/applications/foobot/monitor/umainform.lfm
index 18ea8a88a..abf915685 100644
--- a/applications/foobot/monitor/umainform.lfm
+++ b/applications/foobot/monitor/umainform.lfm
@@ -59,10 +59,10 @@ object mainform: Tmainform
       ShowText = True
       ShowLevel = True
       Value = 10
-      ValueMin = 10
+      ValueMin = 0
       ValueMax = 40
-      ValueRed = 10
-      ValueYellow = 10
+      ValueRed = 0
+      ValueYellow = 30
       AnalogKind = akAnalog
     end
     object as_hum: TAnalogSensor
@@ -132,7 +132,7 @@ object mainform: Tmainform
       ShowLevel = True
       Value = 0
       ValueMin = 0
-      ValueMax = 1000
+      ValueMax = 700
       ValueRed = 0
       ValueYellow = 0
       AnalogKind = akAnalog
@@ -382,6 +382,7 @@ object mainform: Tmainform
       end
       object lineseries_allpollu: TLineSeries
         LinePen.Color = clBlue
+        LinePen.Width = 2
       end
     end
   end
diff --git a/applications/foobot/monitor/umainform.pas b/applications/foobot/monitor/umainform.pas
index 5e95fd227..1ee97e96b 100644
--- a/applications/foobot/monitor/umainform.pas
+++ b/applications/foobot/monitor/umainform.pas
@@ -36,7 +36,7 @@ V0.0.5.0: ??
 interface
 
 uses
-  Classes, SysUtils, FileUtil, TAGraph, TAIntervalSources, TASeries, //TASources,
+  Classes, SysUtils, FileUtil, TAGraph, TAIntervalSources, TASeries,
   Sensors, Forms, Controls, Graphics, Dialogs, ExtCtrls, StdCtrls, Menus,
   lclIntf, foobot_utility, uCryptIni, Variants, dateutils, uconfigform;
 
@@ -50,12 +50,27 @@ const
   TWENTYFOURHOURS = ONEHOUR * 24;
 
   // Colours for guages and graph lines
-  COL_PM = clMaroon;
+  COL_PM = clGreen;
   COL_TMP = clRed;
-  COL_HUM = clGreen;
+  COL_HUM = clMaroon;
   COL_CO2 = clLime;
-  COL_VOC = clNavy;
-  COL_ALLPOLLU = clBlue;
+  COL_VOC = clBlue;
+  COL_ALLPOLLU = clFuchsia;
+
+  // Sensor Gauge MINMAX Values
+  MIN_PM = 0;
+  MAX_PM = 1000;
+  MIN_TMP = 0;
+  MAX_TMP = 40;
+  MIN_HUM = 10;
+  MAX_HUM = 100;
+  MIN_CO2 = 450;
+  MAX_CO2 = 3000;
+  MIN_VOC = 125;
+  MAX_VOC = 1000;
+  MIN_ALLPOLLU = 0;
+  MAX_ALLPOLLU = 700;
+
 
 type
 
@@ -143,12 +158,13 @@ type
     sSecretKey, sFoobotUserName, sUUID: string;
     bShowMinimalDisplay: boolean;
     iFudgeFactor: integer;
-    procedure SetUpColours;
+    procedure SetUpSensorColours;
+    procedure SetUpSensorMinMax;
     procedure DisplayReadings;
     procedure UpdateGuage(Sender: TAnalogSensor; SensorNumber: integer);
     procedure UpdateHighLow(SensorNumber: integer);
-    procedure DrawGraphHistory;
-    procedure DrawGraph;
+    procedure GraphHistory;
+    procedure GraphCurrentReading;
   public
     INI: TCryptINIfile;
   end;
@@ -186,7 +202,8 @@ begin
   TrayIcon1.Icon := Application.Icon;
   TrayIcon1.Hint := Application.Title;
   DateTimeIntervalChartSource1.DateTimeFormat := 'hh:nn';
-  SetUpColours;
+  SetUpSensorMinMax;
+  SetUpSensorColours;
 end;
 
 procedure Tmainform.FormActivate(Sender: TObject);
@@ -194,8 +211,7 @@ var
   sTempFoobotUserName, sTempSecretKey: string;
 
 begin
-    ClientHeight := grp_sensorDisplay.Height + grp_highlow.Height +
-    grp_chart.Height;
+  ClientHeight := grp_sensorDisplay.Height + grp_highlow.Height + grp_chart.Height;
 
   // Allow user to enter values in INIFile
   sTempFoobotUserName := INI.ReadUnencryptedString('Config', 'Foobot User', 'unknown');
@@ -222,7 +238,7 @@ begin
         mnu_optionsSaveHighLows.Checked := SaveLoadHighLows;
         if SaveLoadHighLows then
           LoadHighLows;
-        DrawGraphHistory;
+        GraphHistory;
         {$IFNDEF DEBUGMODE}
         mnu_optionsTakeReadingNow.Click;
 {$ENDIF}
@@ -264,7 +280,7 @@ begin
   FreeAndNil(INI);
 end;
 
-procedure Tmainform.SetUpColours;
+procedure Tmainform.SetUpSensorColours;
 begin
   as_pm.ColorFore := COL_PM;
   lineSeries_pm.SeriesColor := COL_PM;
@@ -280,6 +296,22 @@ begin
   lineSeries_allpollu.SeriesColor := COL_ALLPOLLU;
 end;
 
+procedure Tmainform.SetUpSensorMinMax;
+begin
+  as_pm.ValueMin := MIN_PM;
+  as_pm.ValueMax := MAX_PM;
+  as_tmp.ValueMin := MIN_TMP;
+  as_tmp.ValueMax := MAX_TMP;
+  as_hum.ValueMin := MIN_HUM;
+  as_hum.ValueMax := MAX_HUM;
+  as_co2.ValueMin := MIN_CO2;
+  as_co2.ValueMax := MAX_CO2;
+  as_voc.ValueMin := MIN_VOC;
+  as_voc.ValueMax := MAX_VOC;
+  as_allpollu.ValueMin := MIN_ALLPOLLU;
+  as_allpollu.ValueMax := MAX_ALLPOLLU;
+end;
+
 procedure Tmainform.FormWindowStateChange(Sender: TObject);
 begin
   if mainform.WindowState = wsMinimized then
@@ -542,30 +574,35 @@ begin
       for iCount := 1 to 6 do
         UpdateHighLow(iCount);
     end;
-    DrawGraph;
+    GraphCurrentReading;
   end;
 end;
 
-function AsPercent(aValue, aMax: double): double;
+function AsPercent(aValue, aMin, aMax: double): double;
 begin
   if aMax > 0 then
-    Result := aValue / aMax * 100
+    Result := aValue / (aMax - aMin) * 100
   else
     Result := 0;
 end;
 
-procedure Tmainform.DrawGraph;
+procedure Tmainform.GraphCurrentReading;
 begin
-  lineseries_pm.AddXY(FoobotData_time[0], AsPercent(FoobotData_pm[0], as_pm.ValueMax));
-  lineseries_tmp.AddXY(FoobotData_time[0], AsPercent(FoobotData_tmp[0], as_tmp.ValueMax));
-  lineseries_hum.AddXY(FoobotData_time[0], AsPercent(FoobotData_hum[0], as_hum.ValueMax));
-  lineseries_co2.AddXY(FoobotData_time[0], AsPercent(FoobotData_co2[0], as_co2.ValueMax));
-  lineseries_voc.AddXY(FoobotData_time[0], AsPercent(FoobotData_voc[0], as_voc.ValueMax));
+  lineseries_pm.AddXY(FoobotData_time[0],
+    AsPercent(FoobotData_pm[0], as_pm.ValueMin, as_pm.ValueMax));
+  lineseries_tmp.AddXY(FoobotData_time[0], AsPercent(FoobotData_tmp[0],
+    as_tmp.ValueMin, as_tmp.ValueMax));
+  lineseries_hum.AddXY(FoobotData_time[0],
+    AsPercent(FoobotData_hum[0], as_hum.ValueMin, as_hum.ValueMax));
+  lineseries_co2.AddXY(FoobotData_time[0],
+    AsPercent(FoobotData_co2[0], as_co2.ValueMin, as_co2.ValueMax));
+  lineseries_voc.AddXY(FoobotData_time[0],
+    AsPercent(FoobotData_voc[0], as_voc.ValueMin, as_voc.ValueMax));
   lineseries_allpollu.AddXY(FoobotData_time[0],
-    AsPercent(FoobotData_allpollu[0], as_allpollu.ValueMax));
+    AsPercent(FoobotData_allpollu[0], as_allpollu.ValueMin, as_allpollu.ValueMax));
 end;
 
-procedure Tmainform.DrawGraphHistory;
+procedure Tmainform.GraphHistory;
 // Fetch Hourly readings for the previous 2 days (AverageBy=3600)
 // Populate FoobotDataObjectToArrays
 var
@@ -573,7 +610,8 @@ var
   iStartSeconds, iEndSeconds: int64;
 begin
   iEndSeconds := DateTimeToUnix(Now) - 3600;
-  iStartSeconds := iEndSeconds - (2 * (24 * 3600));
+  iStartSeconds := iEndSeconds - (2 * (24 * 3600)); // 49 hours before Now
+  grp_chart.Caption:=Format('History from %s',[FormatDateTime('dd/mm/yyyy hh:nn',UnixToDateTime(iStartSeconds))]);
   if FetchFoobotData(dfStartEnd, 0, 0, 3600, iStartSeconds, iEndSeconds, sSecretKey) =
     False then
     exit;
@@ -581,17 +619,18 @@ begin
     for iCount := 0 to Pred(High(FoobotData_time)) do
     begin
       lineseries_pm.AddXY(FoobotData_time[iCount],
-        AsPercent(FoobotData_pm[iCount], as_pm.ValueMax));
+        AsPercent(FoobotData_pm[iCount], as_pm.ValueMin, as_pm.ValueMax));
       lineseries_tmp.AddXY(FoobotData_time[iCount],
-        AsPercent(FoobotData_tmp[iCount], as_tmp.ValueMax));
+        AsPercent(FoobotData_tmp[iCount], as_tmp.ValueMin, as_tmp.ValueMax));
       lineseries_hum.AddXY(FoobotData_time[iCount],
-        AsPercent(FoobotData_hum[iCount], as_hum.ValueMax));
+        AsPercent(FoobotData_hum[iCount], as_hum.ValueMin, as_hum.ValueMax));
       lineseries_co2.AddXY(FoobotData_time[iCount],
-        AsPercent(FoobotData_co2[iCount], as_co2.ValueMax));
+        AsPercent(FoobotData_co2[iCount], as_co2.ValueMin, as_co2.ValueMax));
       lineseries_voc.AddXY(FoobotData_time[iCount],
-        AsPercent(FoobotData_voc[iCount], as_voc.ValueMax));
+        AsPercent(FoobotData_voc[iCount], as_voc.ValueMin, as_voc.ValueMax));
       lineseries_allpollu.AddXY(FoobotData_time[iCount],
-        AsPercent(FoobotData_allpollu[iCount], as_allpollu.ValueMax));
+        AsPercent(FoobotData_allpollu[iCount], as_allpollu.ValueMin,
+        as_allpollu.ValueMax));
     end;
   ResetArrays; // at end
 end;