diff --git a/app/src/main/java/com/example/hpostesting/presentation/hemocube/HemoCubeFragment.kt b/app/src/main/java/com/example/hpostesting/presentation/hemocube/HemoCubeFragment.kt
index 334346d..6935e03 100644
--- a/app/src/main/java/com/example/hpostesting/presentation/hemocube/HemoCubeFragment.kt
+++ b/app/src/main/java/com/example/hpostesting/presentation/hemocube/HemoCubeFragment.kt
@@ -304,10 +304,11 @@ class HemoCubeFragment : Fragment() {
             val led1Average = calculateAverage(led1BufferForDevice, led1Sample)
             val led2Average = calculateAverage(led2BufferForDevice, led2Sample)
             val deviceRatio = led1Average / led2Average
-
+            val calculatedRatio = calculateRatio(deviceRatio)
             val isBufferValid = validateBuffer(led1BufferForDevice, led2BufferForDevice)
             val isSampleValid =
                 validateSample(led1Sample, led1BufferForDevice, led2Sample, led2BufferForDevice)
+            val isCalculatedRatioValid = validateCalculatedRatio(deviceRatio)
 
             when {
                 !isBufferValid -> showError(
@@ -334,6 +335,11 @@ class HemoCubeFragment : Fragment() {
                     )
                 }
 
+                !isCalculatedRatioValid -> showError(
+                    "calculated Ratio error",
+                    "Check for Empty curved, disconnected and reconnect the device, and please retest this sample again with a new blank"
+                )
+
                 else -> processValidData(
                     deviceSerialNo,
                     led1BufferForDevice,
@@ -344,7 +350,8 @@ class HemoCubeFragment : Fragment() {
                     led1Average,
                     led2Average,
                     deviceRatio,
-                    fullReadOutput
+                    fullReadOutput,
+                    calculatedRatio
                 )
             }
 
@@ -381,6 +388,10 @@ class HemoCubeFragment : Fragment() {
         return average1 > 0.08 && average2 > 0.08
     }
 
+    private fun validateCalculatedRatio(deviceRatio: Double): Boolean {
+        return deviceRatio > 0.08 && deviceRatio < 0.3
+    }
+
     private fun validateHighBloodVolume(average1: Double, average2: Double): Boolean {
         return average1 < 1.07 && average2 < 1.07
     }
@@ -399,7 +410,8 @@ class HemoCubeFragment : Fragment() {
         led1Average: Double,
         led2Average: Double,
         deviceRatio: Double,
-        resultData: String
+        resultData: String,
+        calculatedRatio: Double
     ) {
         val threshold =
             if ((activity as HemocubeActivity).bloodCollectingMethod == Constants.FINGER_PRICK_BLOOD) 0.05 else 0.06
@@ -415,7 +427,7 @@ class HemoCubeFragment : Fragment() {
                 this.led1Average = led1Average
                 this.led2Average = led2Average
                 this.deviceRatio = deviceRatio
-                this.calculatedRatio = calculateRatio(deviceRatio)
+                this.calculatedRatio = calculatedRatio
                 this.resultData = resultData
 
                 if (!isBufferValueAvailable()) {