diff --git a/Listen2Arduino.py b/Listen2Arduino.py
index 60a9f89..b9fddb3 100755
--- a/Listen2Arduino.py
+++ b/Listen2Arduino.py
@@ -123,7 +123,11 @@ while True:
          else:
             with open(tri_file, 'r') as file:
                tri_reading = file.read()
-            point.field("Tritium", float(tri_reading))
+            try:
+               point.field("Tritium", float(tri_reading))
+            except:
+               tri_reading = nan
+               print("cannot read TRI_reading.txt")
 
       with open(outFile, "w") as file:
          for key, value in format_value.items():
diff --git a/serial_relay.py b/serial_relay.py
index 0048c84..330a055 100755
--- a/serial_relay.py
+++ b/serial_relay.py
@@ -28,7 +28,7 @@ try:
                print("Received:", data, ":", data[3:8], "=", int(data[3:8],16),":",round(reading))
                #write to file
                with open(file_path, 'w') as file:
-                  file.write(str(round(reading)))
+                  file.write(str(float(reading)))
                if reading >50:
                   GPIO.output(17, GPIO.LOW)
                   #print ("ON")
diff --git a/statusDisplay/display.cpp b/statusDisplay/display.cpp
index 6a61989..420d6b7 100644
--- a/statusDisplay/display.cpp
+++ b/statusDisplay/display.cpp
@@ -266,7 +266,7 @@ int main() {
         }
     }
 
-    textDisplay( "Tritium Sensor : " + FormatDouble(tritiumReading) + " mCr", 720, 200, isTritiumError ? redColor : blueColor);
+    textDisplay( "Tritium Sensor : " + FormatDouble(tritiumReading) + " uCr/m3", 720, 200, isTritiumError ? redColor : blueColor);
     textDisplay( "Vaccum : " + FormatDouble(vaccumReading) + "x1e-6 Torr", 630, 20, isVaccumError ? redColor: blueColor);
     textDisplay( "SubPump : " + FormatDouble(subPumpReading*1000) + " mA", 300, 40, blueColor);