diff --git a/src/datarecorder.cpp b/src/datarecorder.cpp
--- a/src/datarecorder.cpp
+++ b/src/datarecorder.cpp
@@ -29,9 +29,10 @@ DataRecorder::DataRecorder(QObject *pare
     disableBuffering = false;
 }
 
-bool DataRecorder::startRecording(QString fileName, QStringList channelNames)
+bool DataRecorder::startRecording(QString fileName, QString separator, QStringList channelNames)
 {
     Q_ASSERT(!file.isOpen());
+    _sep =  separator;
 
     // open file
     file.setFileName(fileName);
@@ -45,7 +46,7 @@ bool DataRecorder::startRecording(QStrin
     // write header line
     if (!channelNames.isEmpty())
     {
-        fileStream << channelNames.join(",");
+        fileStream << channelNames.join(_sep);
         fileStream << "\n";
         lastNumChannels = channelNames.length();
     }
@@ -71,7 +72,7 @@ void DataRecorder::addData(double* data,
         for (unsigned ci = 0; ci < numOfChannels; ci++)
         {
             fileStream << data[ci * numOfSamples + i];
-            if (ci != numOfChannels-1) fileStream << ",";
+            if (ci != numOfChannels-1) fileStream << _sep;
         }
         fileStream << '\n';
     }
diff --git a/src/datarecorder.h b/src/datarecorder.h
--- a/src/datarecorder.h
+++ b/src/datarecorder.h
@@ -39,10 +39,11 @@ public:
      * File is opened and header line (names of channels) is written.
      *
      * @param fileName name of the recording file
+     * @param separator column separator
      * @param channelNames names of the channels for header line, if empty no header line is written
      * @return false if file operation fails (read only etc.)
      */
-    bool startRecording(QString fileName, QStringList channelNames);
+    bool startRecording(QString fileName, QString separator, QStringList channelNames);
 
     /**
      * @brief Adds data to a channel.
@@ -70,6 +71,7 @@ private:
     unsigned lastNumChannels;   ///< used for error message only
     QFile file;
     QTextStream fileStream;
+    QString _sep;
 };
 
 #endif // DATARECORDER_H
diff --git a/src/recordpanel.cpp b/src/recordpanel.cpp
--- a/src/recordpanel.cpp
+++ b/src/recordpanel.cpp
@@ -222,7 +222,7 @@ void RecordPanel::startRecording(void)
     {
         channelNames = _channelMan->infoModel()->channelNames();
     }
-    _recorder->startRecording(selectedFile, channelNames);
+    _recorder->startRecording(selectedFile, getSeparator(), channelNames);
     emit recordStarted();
 }
 
@@ -240,3 +240,10 @@ void RecordPanel::onPortClose()
         recordAction.setChecked(false);
     }
 }
+
+QString RecordPanel::getSeparator() const
+{
+    QString sep = ui->leSeparator->text();
+    sep.replace("\\t", "\t");
+    return sep;
+}
diff --git a/src/recordpanel.h b/src/recordpanel.h
--- a/src/recordpanel.h
+++ b/src/recordpanel.h
@@ -90,6 +90,10 @@ private:
     void startRecording(void);
     void stopRecording(void);
 
+    /// Returns separator text from ui. "\t" is converted to TAB
+    /// character.
+    QString getSeparator() const;
+
 private slots:
     /**
      * @brief Opens up the file select dialog
diff --git a/src/recordpanel.ui b/src/recordpanel.ui
--- a/src/recordpanel.ui
+++ b/src/recordpanel.ui
@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>532</width>
-    <height>169</height>
+    <height>261</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -93,6 +93,46 @@
       </widget>
      </item>
      <item>
+      <layout class="QHBoxLayout" name="horizontalLayout_3">
+       <item>
+        <widget class="QLabel" name="label">
+         <property name="text">
+          <string>Column Separator:</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QLineEdit" name="leSeparator">
+         <property name="maximumSize">
+          <size>
+           <width>30</width>
+           <height>16777215</height>
+          </size>
+         </property>
+         <property name="toolTip">
+          <string>For TAB character enter \t</string>
+         </property>
+         <property name="text">
+          <string>,</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <spacer name="horizontalSpacer">
+         <property name="orientation">
+          <enum>Qt::Horizontal</enum>
+         </property>
+         <property name="sizeHint" stdset="0">
+          <size>
+           <width>40</width>
+           <height>20</height>
+          </size>
+         </property>
+        </spacer>
+       </item>
+      </layout>
+     </item>
+     <item>
       <widget class="QCheckBox" name="cbDisableBuffering">
        <property name="toolTip">
         <string>Do not buffer when writing to file. Check this if you are using other software to open the file during recording.</string>
@@ -110,7 +150,7 @@
        <property name="sizeHint" stdset="0">
         <size>
          <width>20</width>
-         <height>40</height>
+         <height>1</height>
         </size>
        </property>
       </spacer>
@@ -143,7 +183,7 @@
        <property name="sizeHint" stdset="0">
         <size>
          <width>20</width>
-         <height>40</height>
+         <height>1</height>
         </size>
        </property>
       </spacer>