diff --git a/sampler/FTSampler.py b/sampler/FTSampler.py
index 00789f8..41d91e8 100644
--- a/sampler/FTSampler.py
+++ b/sampler/FTSampler.py
@@ -189,10 +189,13 @@ def calculateValue():
     # check val min di 1 x denom EWMA...
     if(eFact < 1):
         eFact = 1
-
+    # fix valore minimo denominatore
     den = abs(float(v1)-float(v2))
     if(den < 0.05):
         den = 0.05
+        redSrv0.set('RTDATA:WARNING:DENOMZERO', 1)
+    else:
+        redSrv0.set('RTDATA:WARNING:DENOMZERO', 0)
     # calcolo il valore risultante RealTime pulito (senza correzioni)
     XVal = (float(v2)/float(den))
     redSrv0.set('RTDATA:VALUE:RAW',round(XVal,decimalsCount))
diff --git a/server/templates/logger.html b/server/templates/logger.html
index 2b2bcd4..add0006 100644
--- a/server/templates/logger.html
+++ b/server/templates/logger.html
@@ -97,6 +97,15 @@
                     $("#ExeWarning").show();
                 }
 
+                // controllo i due warning del denominatore
+                $("#DenomWarning01").hide();
+                $("#DenomWarning02").hide();
+                if (result.DisplayDenomAlert == "1") {
+                    $("#DenomWarning01").show();
+                    $("#DenomWarning02").show();
+                }
+
+
                 //scarico unità di misura dei canali mostrati
                 $("#UniMisuA").html(result.UniMeasure[result.ChA]);
                 $("#UniMisuB").html(result.UniMeasure[result.ChB]);
@@ -350,11 +359,19 @@
                     <div class="card text-center">
                         <div class="card-header text-center">
                             <div class="row">
-                                <div class="col-3"></div>
-                                <div class="col-6">
-                                <strong>Risultante B/(A-B) </strong>
+                                <div class="col-3">
+                                    <span class="badge badge-warning" id="DenomWarning01">
+                                        <img src="../static/img/exclamation-triangle-fill.svg" height="10" widht="10"></img>
+                                    </span>
+                                </div>
+                                <div class="col-6">
+                                    <strong>Risultante B/(A-B)</strong>
+                                </div>
+                                <div class="col-3">
+                                    <span class="badge badge-warning" id="DenomWarning02">
+                                        <img src="../static/img/exclamation-triangle-fill.svg" height="10" widht="10"></img>
+                                    </span>
                                 </div>
-                                <div class="col-3"></div>
                             </div>
                         </div>
                         <div class="card-body">