diff --git a/slsDetectorGui/forms/form_tab_dataoutput.ui b/slsDetectorGui/forms/form_tab_dataoutput.ui
index a7b0bb707..c102d8c49 100755
--- a/slsDetectorGui/forms/form_tab_dataoutput.ui
+++ b/slsDetectorGui/forms/form_tab_dataoutput.ui
@@ -533,6 +533,61 @@ Directory where one saves the data.
           </property>
          </widget>
         </item>
+        <item>
+         <spacer name="horizontalSpacer_11">
+          <property name="orientation">
+           <enum>Qt::Horizontal</enum>
+          </property>
+          <property name="sizeType">
+           <enum>QSizePolicy::Expanding</enum>
+          </property>
+          <property name="sizeHint" stdset="0">
+           <size>
+            <width>10</width>
+            <height>20</height>
+           </size>
+          </property>
+         </spacer>
+        </item>
+        <item>
+         <widget class="QCheckBox" name="chkCounter1">
+          <property name="enabled">
+           <bool>false</bool>
+          </property>
+          <property name="text">
+           <string>Counter 1</string>
+          </property>
+          <property name="checked">
+           <bool>true</bool>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <widget class="QCheckBox" name="chkCounter2">
+          <property name="enabled">
+           <bool>false</bool>
+          </property>
+          <property name="text">
+           <string>Counter 2</string>
+          </property>
+          <property name="checked">
+           <bool>true</bool>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <widget class="QCheckBox" name="chkCounter3">
+          <property name="enabled">
+           <bool>false</bool>
+          </property>
+          <property name="text">
+           <string>Counter 3</string>
+          </property>
+          <property name="checked">
+           <bool>true</bool>
+          </property>
+         </widget>
+        </item>
        </layout>
       </item>
       <item row="4" column="0">
diff --git a/slsDetectorGui/include/qTabDataOutput.h b/slsDetectorGui/include/qTabDataOutput.h
index 8f753a6db..35d088268 100644
--- a/slsDetectorGui/include/qTabDataOutput.h
+++ b/slsDetectorGui/include/qTabDataOutput.h
@@ -22,6 +22,7 @@ class qTabDataOutput : public QWidget, private Ui::TabDataOutputObject {
     void SetRateCorrection();
     void SetSpeed(int speed);
     void SetParallel(bool enable);
+    void SetCounterMask();
 
   private:
     void SetupWidgetWindow();
@@ -36,6 +37,7 @@ class qTabDataOutput : public QWidget, private Ui::TabDataOutputObject {
     void GetRateCorrection();
     void GetSpeed();
     void GetParallel();
+    void GetCounterMask();
 
     sls::Detector *det;
     // Button group for radiobuttons for rate
diff --git a/slsDetectorGui/src/qTabDataOutput.cpp b/slsDetectorGui/src/qTabDataOutput.cpp
index f750b7cba..dec28ecad 100644
--- a/slsDetectorGui/src/qTabDataOutput.cpp
+++ b/slsDetectorGui/src/qTabDataOutput.cpp
@@ -1,7 +1,9 @@
 #include "qTabDataOutput.h"
 #include "qDefs.h"
+#include "sls/bit_utils.h"
 
 #include <QButtonGroup>
+#include <QCheckBox>
 #include <QFileDialog>
 #include <QStandardItemModel>
 #include <QString>
@@ -23,6 +25,12 @@ void qTabDataOutput::SetupWidgetWindow() {
     btnGroupRate = new QButtonGroup(this);
     btnGroupRate->addButton(radioDefaultDeadtime, 0);
     btnGroupRate->addButton(radioCustomDeadtime, 1);
+    chkCounter1->setEnabled(false);
+    chkCounter2->setEnabled(false);
+    chkCounter3->setEnabled(false);
+    chkCounter1->hide();
+    chkCounter2->hide();
+    chkCounter3->hide();
 
     // enabling according to det type
     switch (det->getDetectorType().squash()) {
@@ -41,6 +49,12 @@ void qTabDataOutput::SetupWidgetWindow() {
         break;
     case slsDetectorDefs::MYTHEN3:
         chkParallel->setEnabled(true);
+        chkCounter1->setEnabled(true);
+        chkCounter2->setEnabled(true);
+        chkCounter3->setEnabled(true);
+        chkCounter1->show();
+        chkCounter2->show();
+        chkCounter3->show();
         break;
     case slsDetectorDefs::JUNGFRAU:
         lblClkDivider->setEnabled(true);
@@ -87,6 +101,14 @@ void qTabDataOutput::Initialization() {
         connect(chkParallel, SIGNAL(toggled(bool)), this,
                 SLOT(SetParallel(bool)));
     }
+    if (chkCounter1->isEnabled()) {
+        connect(chkCounter1, SIGNAL(toggled(bool)), this,
+                SLOT(SetCounterMask()));
+        connect(chkCounter2, SIGNAL(toggled(bool)), this,
+                SLOT(SetCounterMask()));
+        connect(chkCounter3, SIGNAL(toggled(bool)), this,
+                SLOT(SetCounterMask()));
+    }
     // speed
     if (comboClkDivider->isEnabled()) {
         connect(comboClkDivider, SIGNAL(currentIndexChanged(int)), this,
@@ -416,6 +438,55 @@ void qTabDataOutput::SetParallel(bool enable) {
                  &qTabDataOutput::GetParallel)
 }
 
+void qTabDataOutput::GetCounterMask() {
+    LOG(logDEBUG) << "Getting counter mask";
+    disconnect(chkCounter1, SIGNAL(toggled(bool)), this,
+               SLOT(SetCounterMask()));
+    disconnect(chkCounter2, SIGNAL(toggled(bool)), this,
+               SLOT(SetCounterMask()));
+    disconnect(chkCounter3, SIGNAL(toggled(bool)), this,
+               SLOT(SetCounterMask()));
+    try {
+        auto retval = sls::getSetBits(det->getCounterMask().tsquash(
+            "Counter mask is inconsistent for all detectors."));
+        std::vector<QCheckBox *> counters = {chkCounter1, chkCounter2,
+                                             chkCounter3};
+        for (unsigned int i = 0; i < counters.size(); ++i) {
+            counters[i]->setChecked(false);
+        }
+        for (unsigned int i = 0; i < retval.size(); ++i) {
+            if (retval[i] > 3) {
+                throw sls::RuntimeError(
+                    std::string("Unknown counter index : ") +
+                    std::to_string(static_cast<int>(retval[i])));
+            }
+            counters[retval[i]]->setChecked(true);
+        }
+    }
+    CATCH_DISPLAY("Could not get parallel readout.",
+                  "qTabDataOutput::GetParallel")
+    connect(chkCounter1, SIGNAL(toggled(bool)), this, SLOT(SetCounterMask()));
+    connect(chkCounter2, SIGNAL(toggled(bool)), this, SLOT(SetCounterMask()));
+    connect(chkCounter3, SIGNAL(toggled(bool)), this, SLOT(SetCounterMask()));
+}
+
+void qTabDataOutput::SetCounterMask() {
+    std::vector<QCheckBox *> counters = {chkCounter1, chkCounter2, chkCounter3};
+    uint32_t mask = 0;
+    for (unsigned int i = 0; i < counters.size(); ++i) {
+        if (counters[i]->isChecked()) {
+            mask |= (1 << i);
+        }
+    }
+    LOG(logINFO) << "Setting counter mask to " << mask;
+    try {
+        det->setCounterMask(mask);
+    }
+    CATCH_HANDLE("Could not set counter mask.",
+                 "qTabDataOutput::SetCounterMask", this,
+                 &qTabDataOutput::GetCounterMask)
+}
+
 void qTabDataOutput::Refresh() {
     LOG(logDEBUG) << "**Updating DataOutput Tab";
 
@@ -434,6 +505,9 @@ void qTabDataOutput::Refresh() {
     if (chkParallel->isEnabled()) {
         GetParallel();
     }
+    if (chkCounter1->isEnabled()) {
+        GetCounterMask();
+    }
     if (comboClkDivider->isEnabled()) {
         GetSpeed();
     }