Level Transmitter 244LD/144LD Steam Boiler Application

[AmrHany]

I have 3 Level Transmitters Model 144LD-22LKRSEA4PP2H-A on Steam Boiler (320°C and 120 Barg).

The Problem is the reading from the 3 Transmitters are different due to High Temperature influence on the Transmitter Sensor.

Although the Finger Print is loaded on the 3 Transmitters but there is a deviation in reading between the 3 Transmitters.

Also the Displacer Chamber is isolated from the High Temperature 

I tried several times to zero the Transmitters at field (At High Temeprature) but the problem happened again after some time.

Also I changed the Transmitter with the equivalent 244LD Levelstar but the Problem also happened.

So what is the solution?

[ECIJeff]

You may try fielddevices-support@schneider-electric.com email for support.  Good luck!