Please update the following code sections to be able to work with more sensors (8) preferred. Please only comment lines changed.

public partial class Form1 Form string bufferstring = ""; double[][] buffernew double[5][]; // Main Buffer int NumberOfSensors-new int(); long totalSample-new Int32); int SamplewindowSize-new int(); /I width of your Chart Stopwatch sw-new Stopwatch(); private bool recordflag-false; // Recording flag bool anydata-true; // for choosing between reading any data at delegatr or reading sensor data int indx = 0; // to reset consol display every 100 readings public Form10) InitializeComponent); string[] portsSerialPort.GetPortNames (); foreach (string port in ports) comboBox1.Items.Add(port); //comboBox1.SelectedItemcomboBox1.Items [1]; ArdDataSize.SelectedItemArdDataSize.Items [3]. BRate.SelectedItemBRate.Items [6]; //if (AutodetectArduinoPort() != "") //comboBox1 . Text = AutodetectArduinoPort(); NumberOfSensors5 SampleWindowSize-500; totalSample e; for(int i-e;i e) // Save the contents of the RichTextBox into the file. //bufferstring..SaveFile(saveFile1.FileName, RichTextBoxstreamType.PlainText) File.writeAllText (saveFile1.FileName, bufferString); // Chart update charti.Series["Sensor 1"].Points.Clear) // you've to clear chart chart1.Series[" Sensor 2"].Points.clear); charti.Series["Sensor 3"].Points.clear) chartl.Series[ "Sensor 4].Points.clerO: charti.Series["Sensor 5"].Points.lear); for (int j " 0; j