diff --git a/ISCamRecorder/ISCamRecorder.csproj b/ISCamRecorder/ISCamRecorder.csproj
index 7034dd2..2018da5 100644
--- a/ISCamRecorder/ISCamRecorder.csproj
+++ b/ISCamRecorder/ISCamRecorder.csproj
@@ -100,6 +100,7 @@
     <Compile Include="NAudio\Utils\FieldDescriptionAttribute.cs" />
     <Compile Include="Program.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="SensorData.cs" />
     <Compile Include="SinkListener.cs" />
     <EmbeddedResource Include="MainForm.resx">
       <DependentUpon>MainForm.cs</DependentUpon>
diff --git a/ISCamRecorder/MainForm.Designer.cs b/ISCamRecorder/MainForm.Designer.cs
index 1a47b16..e76d20a 100644
--- a/ISCamRecorder/MainForm.Designer.cs
+++ b/ISCamRecorder/MainForm.Designer.cs
@@ -23,7 +23,6 @@
         /// コード エディターで変更しないでください。
         /// </summary>
         private void InitializeComponent() {
-            this.components = new System.ComponentModel.Container();
             System.Windows.Forms.DataVisualization.Charting.ChartArea chartArea1 = new System.Windows.Forms.DataVisualization.Charting.ChartArea();
             System.Windows.Forms.DataVisualization.Charting.Series series1 = new System.Windows.Forms.DataVisualization.Charting.Series();
             System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(MainForm));
@@ -34,6 +33,8 @@
             this.splitContainer3 = new System.Windows.Forms.SplitContainer();
             this.TxtTop = new System.Windows.Forms.TextBox();
             this.icTop = new TIS.Imaging.ICImagingControl();
+            this.TxtSensor = new System.Windows.Forms.TextBox();
+            this.chart1 = new System.Windows.Forms.DataVisualization.Charting.Chart();
             this.splitContainer4 = new System.Windows.Forms.SplitContainer();
             this.TxtLeft = new System.Windows.Forms.TextBox();
             this.icLeft = new TIS.Imaging.ICImagingControl();
@@ -58,8 +59,6 @@
             this.label6 = new System.Windows.Forms.Label();
             this.label7 = new System.Windows.Forms.Label();
             this.CboImageType = new System.Windows.Forms.ComboBox();
-            this.serialPort1 = new System.IO.Ports.SerialPort(this.components);
-            this.chart1 = new System.Windows.Forms.DataVisualization.Charting.Chart();
             ((System.ComponentModel.ISupportInitialize)(this.splitContainer1)).BeginInit();
             this.splitContainer1.Panel1.SuspendLayout();
             this.splitContainer1.Panel2.SuspendLayout();
@@ -72,6 +71,7 @@
             this.splitContainer3.Panel2.SuspendLayout();
             this.splitContainer3.SuspendLayout();
             ((System.ComponentModel.ISupportInitialize)(this.icTop)).BeginInit();
+            ((System.ComponentModel.ISupportInitialize)(this.chart1)).BeginInit();
             ((System.ComponentModel.ISupportInitialize)(this.splitContainer4)).BeginInit();
             this.splitContainer4.Panel1.SuspendLayout();
             this.splitContainer4.Panel2.SuspendLayout();
@@ -83,7 +83,6 @@
             this.splitContainer5.SuspendLayout();
             ((System.ComponentModel.ISupportInitialize)(this.icFront)).BeginInit();
             ((System.ComponentModel.ISupportInitialize)(this.icRight)).BeginInit();
-            ((System.ComponentModel.ISupportInitialize)(this.chart1)).BeginInit();
             this.SuspendLayout();
             // 
             // BtnSetProperty
@@ -153,6 +152,7 @@
             // 
             // splitContainer3.Panel2
             // 
+            this.splitContainer3.Panel2.Controls.Add(this.TxtSensor);
             this.splitContainer3.Panel2.Controls.Add(this.chart1);
             this.splitContainer3.Size = new System.Drawing.Size(592, 248);
             this.splitContainer3.SplitterDistance = 296;
@@ -184,6 +184,38 @@
             this.icTop.Size = new System.Drawing.Size(290, 218);
             this.icTop.TabIndex = 1;
             // 
+            // TxtSensor
+            // 
+            this.TxtSensor.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left) 
+            | System.Windows.Forms.AnchorStyles.Right)));
+            this.TxtSensor.BackColor = System.Drawing.Color.Aquamarine;
+            this.TxtSensor.Location = new System.Drawing.Point(3, 3);
+            this.TxtSensor.Name = "TxtSensor";
+            this.TxtSensor.ReadOnly = true;
+            this.TxtSensor.Size = new System.Drawing.Size(288, 19);
+            this.TxtSensor.TabIndex = 3;
+            this.TxtSensor.Text = "逆血センサー";
+            // 
+            // chart1
+            // 
+            this.chart1.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
+            | System.Windows.Forms.AnchorStyles.Left) 
+            | System.Windows.Forms.AnchorStyles.Right)));
+            chartArea1.AxisX.LabelStyle.Format = "hh:mm:ss";
+            chartArea1.Name = "ChartArea1";
+            this.chart1.ChartAreas.Add(chartArea1);
+            this.chart1.Location = new System.Drawing.Point(3, 28);
+            this.chart1.Name = "chart1";
+            series1.ChartArea = "ChartArea1";
+            series1.ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.FastLine;
+            series1.Name = "Series1";
+            series1.XValueType = System.Windows.Forms.DataVisualization.Charting.ChartValueType.Time;
+            series1.YValueType = System.Windows.Forms.DataVisualization.Charting.ChartValueType.Int32;
+            this.chart1.Series.Add(series1);
+            this.chart1.Size = new System.Drawing.Size(286, 220);
+            this.chart1.TabIndex = 0;
+            this.chart1.Text = "chart1";
+            // 
             // splitContainer4
             // 
             this.splitContainer4.Dock = System.Windows.Forms.DockStyle.Fill;
@@ -307,7 +339,7 @@
             this.TxtRecodingDulation.TabIndex = 8;
             this.TxtRecodingDulation.Text = "3";
             this.TxtRecodingDulation.TextAlign = System.Windows.Forms.HorizontalAlignment.Right;
-            this.TxtRecodingDulation.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.TxtRecodingDulation_KeyPress);
+            this.TxtRecodingDulation.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.NumberKeyOnly);
             // 
             // label1
             // 
@@ -380,6 +412,7 @@
             this.TxtTriggerFPS.TabIndex = 16;
             this.TxtTriggerFPS.Text = "40.0";
             this.TxtTriggerFPS.TextAlign = System.Windows.Forms.HorizontalAlignment.Right;
+            this.TxtTriggerFPS.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.NumberKeyOnly);
             // 
             // label4
             // 
@@ -416,6 +449,7 @@
             this.TxtMovieRate.TabIndex = 20;
             this.TxtMovieRate.Text = "3000";
             this.TxtMovieRate.TextAlign = System.Windows.Forms.HorizontalAlignment.Right;
+            this.TxtMovieRate.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.NumberKeyOnly);
             // 
             // label6
             // 
@@ -448,26 +482,6 @@
             this.CboImageType.TabIndex = 21;
             this.CboImageType.Text = "JPG";
             // 
-            // chart1
-            // 
-            this.chart1.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
-            | System.Windows.Forms.AnchorStyles.Left) 
-            | System.Windows.Forms.AnchorStyles.Right)));
-            chartArea1.AxisX.LabelStyle.Format = "hh:mm:ss";
-            chartArea1.Name = "ChartArea1";
-            this.chart1.ChartAreas.Add(chartArea1);
-            this.chart1.Location = new System.Drawing.Point(3, 3);
-            this.chart1.Name = "chart1";
-            series1.ChartArea = "ChartArea1";
-            series1.ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.FastLine;
-            series1.Name = "Series1";
-            series1.XValueType = System.Windows.Forms.DataVisualization.Charting.ChartValueType.Time;
-            series1.YValueType = System.Windows.Forms.DataVisualization.Charting.ChartValueType.Int32;
-            this.chart1.Series.Add(series1);
-            this.chart1.Size = new System.Drawing.Size(286, 245);
-            this.chart1.TabIndex = 0;
-            this.chart1.Text = "chart1";
-            // 
             // MainForm
             // 
             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
@@ -498,6 +512,7 @@
             this.FormClosing += new System.Windows.Forms.FormClosingEventHandler(this.MainForm_FormClosing);
             this.Load += new System.EventHandler(this.MainForm_Load);
             this.SizeChanged += new System.EventHandler(this.MainForm_SizeChanged);
+            this.Paint += new System.Windows.Forms.PaintEventHandler(this.MainForm_Paint);
             this.splitContainer1.Panel1.ResumeLayout(false);
             this.splitContainer1.Panel2.ResumeLayout(false);
             ((System.ComponentModel.ISupportInitialize)(this.splitContainer1)).EndInit();
@@ -508,9 +523,11 @@
             this.splitContainer3.Panel1.ResumeLayout(false);
             this.splitContainer3.Panel1.PerformLayout();
             this.splitContainer3.Panel2.ResumeLayout(false);
+            this.splitContainer3.Panel2.PerformLayout();
             ((System.ComponentModel.ISupportInitialize)(this.splitContainer3)).EndInit();
             this.splitContainer3.ResumeLayout(false);
             ((System.ComponentModel.ISupportInitialize)(this.icTop)).EndInit();
+            ((System.ComponentModel.ISupportInitialize)(this.chart1)).EndInit();
             this.splitContainer4.Panel1.ResumeLayout(false);
             this.splitContainer4.Panel1.PerformLayout();
             this.splitContainer4.Panel2.ResumeLayout(false);
@@ -525,7 +542,6 @@
             this.splitContainer5.ResumeLayout(false);
             ((System.ComponentModel.ISupportInitialize)(this.icFront)).EndInit();
             ((System.ComponentModel.ISupportInitialize)(this.icRight)).EndInit();
-            ((System.ComponentModel.ISupportInitialize)(this.chart1)).EndInit();
             this.ResumeLayout(false);
             this.PerformLayout();
 
@@ -563,8 +579,8 @@
         private System.Windows.Forms.Label label6;
         private System.Windows.Forms.Label label7;
         private System.Windows.Forms.ComboBox CboImageType;
-        private System.IO.Ports.SerialPort serialPort1;
         private System.Windows.Forms.DataVisualization.Charting.Chart chart1;
+        private System.Windows.Forms.TextBox TxtSensor;
     }
 }
 
diff --git a/ISCamRecorder/MainForm.cs b/ISCamRecorder/MainForm.cs
index fa96034..d54c1be 100644
--- a/ISCamRecorder/MainForm.cs
+++ b/ISCamRecorder/MainForm.cs
@@ -11,13 +11,13 @@
 using System.Reflection;
 using System.IO;
 using NAudio.MediaFoundation;
-using System.Management;
-using System.IO.Ports;
 using System.Windows.Forms.DataVisualization.Charting;
+using System.Threading;
 
 namespace ISCamRecorder {
     public partial class MainForm : Form {
-        readonly string SERIAL_PORT_NAME = "USB シリアル";
+
+        readonly int PLOT_LENGTH = 200;
 
         private System.Threading.Timer _UITimer;    // UI更新タイマー
         List<ISCamera> _Cameras = new List<ISCamera> ();    // カメラオブジェクト
@@ -26,8 +26,8 @@
         Task _SerialThread;             // シリアル通信スレッド
         float _TriggerFrameRate = 30.0F;
         private ulong _availablePhysicalMemory; //合計物理メモリ
-        Queue<int> _SensorValues = new Queue<int>();
-        Queue<DateTime> _SensorTime = new Queue<DateTime>();
+        SensorData _Sensor = new SensorData();
+        DateTime _LastUpdate;
 
         /// <summary>
         /// コンストラクタ
@@ -52,20 +52,11 @@
             _Cameras.Add(new ISCamera(icRight, "9220025"));
             _Cameras.ForEach(c => c.Connect());
 
-            // グラフ初期化
-            chart1.Series[0].Points.Clear();
-            //chart1.ChartAreas.Clear();
-            //chart1.Series.Clear();
-            //var chartArea = new ChartArea("chartArea");
-            //chart1.ChartAreas.Add(chartArea);
-            //var series = new Series();
-            //series.ChartType = SeriesChartType.Line;
-            //chart1.Series.Add(series);
-
             // タイマー起動
-            _UITimer = new System.Threading.Timer(UITimerCB, this, 0, 2000);
+            _UITimer = new System.Threading.Timer(UITimerCB, this, 0, 100);
             _TriggerThread = Task.Run(TriggerThread);
             _SerialThread = Task.Run(SerialThread);
+            _LastUpdate = DateTime.Now;
         }
 
         /// <summary>
@@ -89,90 +80,46 @@
         /// シリアル通信スレッド
         /// </summary>
         private void SerialThread() {
-            // シリアルポート接続 
-            var portname = GetSerialPort();
-            if (portname.Length < 1) {
-                MessageBox.Show("シリアルデバイスに接続できません", "Error",
-                    MessageBoxButtons.OK, MessageBoxIcon.Warning);
-                return;
-            }
-            serialPort1.BaudRate = 9600;
-            serialPort1.Parity = Parity.None;
-            serialPort1.DataBits = 8;
-            serialPort1.StopBits = StopBits.One;
-            serialPort1.Handshake = Handshake.None;
-            serialPort1.RtsEnable = true;
-            serialPort1.PortName = portname;
-            serialPort1.Open();
-            Debug.WriteLine($"Serial Connect {portname}");
-            while (!_ExitSignal) {
-                var str = serialPort1.ReadLine();
-                if (_ExitSignal) break;
-                var val = int.Parse(str);
-                var dt = DateTime.Now;
-                _SensorValues.Enqueue(val);
-                _SensorTime.Enqueue(dt);
-                if (_SensorValues.Count > 100) {
-                    _SensorValues.Dequeue();
-                    _SensorTime.Dequeue();
-                }
-                if (!_ExitSignal) Plot();
-            }
+            if (!_Sensor.Connect(PLOT_LENGTH)) return;
+            _Sensor.Loop();
         }
 
         /// <summary>
         /// グラフをプロット
         /// </summary>
         private void Plot() {
-            if (!this.IsDisposed && this.InvokeRequired) {
-                this.Invoke((MethodInvoker)delegate { Plot(); });
-                return;
-            }
             chart1.Series[0].Points.Clear();
-            for (var i = 0; i < _SensorValues.Count; i++) {
-                chart1.Series[0].Points.AddXY(
-                    _SensorTime.ElementAt(i), _SensorValues.ElementAt(i));
-            }
+            var times = _Sensor.Times.ToList();
+            var values = _Sensor.Values.ToList();
+            chart1.Series[0].Points.DataBindXY(times, values);
         }
 
-        /// <summary>
-        /// シリアルポート取得
-        /// </summary>
-        /// <returns></returns>
-        private string GetSerialPort() {
-            var portname = "";
-            var mcW32SerPort = new ManagementClass("Win32_SerialPort");
-            foreach (var port in mcW32SerPort.GetInstances()) {
-                if (port.GetPropertyValue("Caption").ToString().Contains(SERIAL_PORT_NAME)) {
-                    portname = port.GetPropertyValue("DeviceID").ToString();
-                }
-            }
-            return portname;
-        }
 
         /// <summary>
         /// タイマーイベント
         /// </summary>
         /// <param name="obj"></param>
         static void UITimerCB(object obj) {
-            ((MainForm)obj).UpdateForm();
+            ((MainForm)obj).Invalidate();
         }
 
         /// <summary>
         /// トリガー発生
         /// </summary>
         public void UpdateForm() {
-            if (this.InvokeRequired) {
-                this.Invoke((MethodInvoker)delegate { UpdateForm(); });
-                return;
+            var now = DateTime.Now; 
+            var elapsed = now - _LastUpdate;
+            if (elapsed.TotalSeconds > 2) {
+                _LastUpdate = now;
+                TxtTop.Text = $"上方カメラ {_Cameras[0].CameraInfo()}";
+                TxtLeft.Text = $"左方カメラ {_Cameras[1].CameraInfo()}";
+                TxtFront.Text = $"前方カメラ {_Cameras[2].CameraInfo()}";
+                TxtRight.Text = $"右方カメラ {_Cameras[3].CameraInfo()}";
+                TotalPhysicalMemory();
+                MemoryToUse();
+                _TriggerFrameRate = float.Parse(TxtTriggerFPS.Text);
             }
-            TxtTop.Text = $"上方カメラ {_Cameras[0].CameraInfo()}";
-            TxtLeft.Text = $"左方カメラ {_Cameras[1].CameraInfo()}";
-            TxtFront.Text = $"前方カメラ {_Cameras[2].CameraInfo()}";
-            TxtRight.Text = $"右方カメラ {_Cameras[3].CameraInfo()}";
-            TotalPhysicalMemory();
-            MemoryToUse();
-            _TriggerFrameRate = float.Parse(TxtTriggerFPS.Text);
+            Plot();
         }
 
         /// <summary>
@@ -204,11 +151,11 @@
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void MainForm_FormClosing(object sender, FormClosingEventArgs e) {
-            serialPort1.Close();
-            _ExitSignal = true;
             _UITimer.Dispose();
+            _Sensor.Stop();
+            _ExitSignal = true;
             _TriggerThread.Wait();
-            _SerialThread.Wait(1000);
+            _SerialThread.Wait();
         }
 
         /// <summary>
@@ -257,7 +204,7 @@
         /// </summary>
         /// <param name="sender"></param>
         /// <param name="e"></param>
-        private void TxtRecodingDulation_KeyPress(object sender, KeyPressEventArgs e) {
+        private void NumberKeyOnly(object sender, KeyPressEventArgs e) {
             //バックスペースが押された時は有効（Deleteキーも有効）
             if (e.KeyChar == '\b' || e.KeyChar == '.') {
                 return;
@@ -320,5 +267,14 @@
                 BtnSetProperty.Enabled = true;
             }
         }
+
+        /// <summary>
+        /// フォーム再描画
+        /// </summary>
+        /// <param name="sender"></param>
+        /// <param name="e"></param>
+        private void MainForm_Paint(object sender, PaintEventArgs e) {
+            UpdateForm();
+        }
     }
 }
diff --git a/ISCamRecorder/MainForm.resx b/ISCamRecorder/MainForm.resx
index 1b87d9c..8d6a7ab 100644
--- a/ISCamRecorder/MainForm.resx
+++ b/ISCamRecorder/MainForm.resx
@@ -117,9 +117,6 @@
   <resheader name="writer">
     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </resheader>
-  <metadata name="serialPort1.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
-    <value>17, 17</value>
-  </metadata>
   <assembly alias="System.Drawing" name="System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
   <data name="$this.Icon" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
     <value>
diff --git a/ISCamRecorder/SensorData.cs b/ISCamRecorder/SensorData.cs
new file mode 100644
index 0000000..6b03439
--- /dev/null
+++ b/ISCamRecorder/SensorData.cs
@@ -0,0 +1,95 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.IO.Ports;
+using System.Management;
+using System.Diagnostics;
+
+namespace ISCamRecorder {
+    internal class SensorData {
+        readonly string SERIAL_PORT_NAME = "USB シリアル";
+
+        public Queue<int> Values { get; private set; } = new Queue<int>();
+        public Queue<DateTime> Times { get; private set; } = new Queue<DateTime>();
+        SerialPort _Serial = null;
+        bool _ExitSignal = false;       // 終了シグナル
+        int _QueueLength = 100;
+
+        /// <summary>
+        /// 接続
+        /// </summary>
+        /// <returns></returns>
+        public bool Connect(int queueLength) {
+            _QueueLength = queueLength;
+
+            // シリアルポート接続 
+            var portname = GetSerialPort();
+            if (portname.Length < 1) {
+                //MessageBox.Show("シリアルデバイスに接続できません", "Error",
+                //    MessageBoxButtons.OK, MessageBoxIcon.Warning);
+                return false;
+            }
+            _Serial = new SerialPort {
+                PortName = portname,
+                BaudRate = 9600,
+                DataBits = 8,
+                Parity = Parity.None,
+                StopBits = StopBits.One,
+                Handshake = Handshake.None,
+                Encoding = Encoding.ASCII,
+                WriteTimeout = 1000,
+                ReadTimeout = 1000,
+                RtsEnable = true,
+            };
+            try {
+                _Serial.Open();
+            } catch (Exception ex) {
+                Debug.WriteLine(ex.Message);
+                return false;
+            }
+            Debug.WriteLine($"Serial Connect {portname}");
+            return true;
+        }
+
+        /// <summary>
+        /// 受信ループ
+        /// </summary>
+        public void Loop() {
+            while (!_ExitSignal) {
+                var str = _Serial.ReadLine();
+                var val = int.Parse(str);
+                var dt = DateTime.Now;
+                Values.Enqueue(val);
+                Times.Enqueue(dt);
+                if (Values.Count > _QueueLength) {
+                    Values.Dequeue();
+                    Times.Dequeue();
+                }
+            }
+
+            _Serial?.Close();
+            _Serial = null;
+        }
+
+        public void Stop() {
+            _ExitSignal = true;
+        }
+
+        /// <summary>
+        /// シリアルポート取得
+        /// </summary>
+        /// <returns></returns>
+        private string GetSerialPort() {
+            var portname = "";
+            var mcW32SerPort = new ManagementClass("Win32_SerialPort");
+            foreach (var port in mcW32SerPort.GetInstances()) {
+                if (port.GetPropertyValue("Caption").ToString().Contains(SERIAL_PORT_NAME)) {
+                    portname = port.GetPropertyValue("DeviceID").ToString();
+                }
+            }
+            return portname;
+        }
+    }
+}