Index: leahi_dialin/td/modules/pressure_sensors.py
===================================================================
diff -u -rd864e0c1d88eb80c093137100b667d41f2de2443 -rdcb0ff38b7904e7327643804446f2f834d6732fd
--- leahi_dialin/td/modules/pressure_sensors.py	(.../pressure_sensors.py)	(revision d864e0c1d88eb80c093137100b667d41f2de2443)
+++ leahi_dialin/td/modules/pressure_sensors.py	(.../pressure_sensors.py)	(revision dcb0ff38b7904e7327643804446f2f834d6732fd)
@@ -89,28 +89,30 @@
         @return: none
         """
         sensor_list =[]
-        sensor_list.append((self.td_pressure_sensors[td_enum_repository.TDPressureSensorNames.H2_PRES.name][td_enum_repository.TDPressureSensorAttributes.PRES.name], 'f'))
-        sensor_list.append((self.td_pressure_sensors[td_enum_repository.TDPressureSensorNames.H14_PRES.name][td_enum_repository.TDPressureSensorAttributes.PRES.name], 'f'))
-        sensor_list.append((self.pressure_limits_state, 'f'))
-        sensor_list.append((self.td_pressure_sensors[td_enum_repository.TDPressureSensorNames.H2_PRES.name][td_enum_repository.TDPressureSensorAttributes.PRES_LIMIT_MIN.name], 'f'))
-        sensor_list.append((self.td_pressure_sensors[td_enum_repository.TDPressureSensorNames.H2_PRES.name][td_enum_repository.TDPressureSensorAttributes.PRES_LIMIT_MAX.name], 'f'))
-        sensor_list.append((self.td_pressure_sensors[td_enum_repository.TDPressureSensorNames.H14_PRES.name][td_enum_repository.TDPressureSensorAttributes.PRES_LIMIT_MIN.name], 'f'))
-        sensor_list.append((self.td_pressure_sensors[td_enum_repository.TDPressureSensorNames.H14_PRES.name][td_enum_repository.TDPressureSensorAttributes.PRES_LIMIT_MAX.name], 'f'))
-        sensor_list.append((self.td_pressure_sensors[td_enum_repository.TDPressureSensorNames.H2_PRES.name][td_enum_repository.TDPressureSensorAttributes.LONG_FILTERED_PRESSURE.name], 'f'))
-        sensor_list.append((self.td_pressure_sensors[td_enum_repository.TDPressureSensorNames.H14_PRES.name][td_enum_repository.TDPressureSensorAttributes.LONG_FILTERED_PRESSURE.name], 'f'))
-        sensor_list.append((self.tmp_pressure, 'f'))
-        sensor_list.append((self.tmp_long_filtered_pressure, 'f'))
-        sensor_list.append((self.tmp_min_limit, 'f'))
-        sensor_list.append((self.tmp_max_limit, 'f'))
-        sensor_list.append((self.td_pressure_sensors[td_enum_repository.TDPressureSensorNames.H23_PRES.name][td_enum_repository.TDPressureSensorAttributes.PRES.name], 'f'))
+        sensor_list.append(['self.td_pressure_sensors[td_enum_repository.TDPressureSensorNames.H2_PRES.name][td_enum_repository.TDPressureSensorAttributes.PRES.name]', 'f'])
+        sensor_list.append(['self.td_pressure_sensors[td_enum_repository.TDPressureSensorNames.H14_PRES.name][td_enum_repository.TDPressureSensorAttributes.PRES.name]', 'f'])
+        sensor_list.append(['self.pressure_limits_state', 'f'])
+        sensor_list.append(['self.td_pressure_sensors[td_enum_repository.TDPressureSensorNames.H2_PRES.name][td_enum_repository.TDPressureSensorAttributes.PRES_LIMIT_MIN.name]', 'f'])
+        sensor_list.append(['self.td_pressure_sensors[td_enum_repository.TDPressureSensorNames.H2_PRES.name][td_enum_repository.TDPressureSensorAttributes.PRES_LIMIT_MAX.name]', 'f'])
+        sensor_list.append(['self.td_pressure_sensors[td_enum_repository.TDPressureSensorNames.H14_PRES.name][td_enum_repository.TDPressureSensorAttributes.PRES_LIMIT_MIN.name]', 'f'])
+        sensor_list.append(['self.td_pressure_sensors[td_enum_repository.TDPressureSensorNames.H14_PRES.name][td_enum_repository.TDPressureSensorAttributes.PRES_LIMIT_MAX.name]', 'f'])
+        sensor_list.append(['self.td_pressure_sensors[td_enum_repository.TDPressureSensorNames.H2_PRES.name][td_enum_repository.TDPressureSensorAttributes.LONG_FILTERED_PRESSURE.name]', 'f'])
+        sensor_list.append(['self.td_pressure_sensors[td_enum_repository.TDPressureSensorNames.H14_PRES.name][td_enum_repository.TDPressureSensorAttributes.LONG_FILTERED_PRESSURE.name]', 'f'])
+        sensor_list.append(['self.tmp_pressure', 'f'])
+        sensor_list.append(['self.tmp_long_filtered_pressure', 'f'])
+        sensor_list.append(['self.tmp_min_limit', 'f'])
+        sensor_list.append(['self.tmp_max_limit', 'f'])
+        sensor_list.append(['self.td_pressure_sensors[td_enum_repository.TDPressureSensorNames.H23_PRES.name][td_enum_repository.TDPressureSensorAttributes.PRES.name]', 'f'])
 
         i = 1
         for sensor in sensor_list:
             start_pos = eval(f'MsgFieldPositions.START_POS_FIELD_{i}')
             end_pos = eval(f'MsgFieldPositions.END_POS_FIELD_{i}')
-            sensor[0] = struct.unpack(sensor[1],bytearray(message['message'][start_pos:end_pos]))[0]
+            value = struct.unpack(sensor[1],bytearray(message['message'][start_pos:end_pos]))[0]
+            if 'nan' in str(value).lower():
+                value = None
+            exec(f'{sensor[0]} = {value}')
             i += 1
-
         self.td_pressure_timestamp = timestamp