Does anyone know of a means of obtaining a model (either a PC
based software package or someone offering a service) of the
temperature distribution of a membrane heater device, taking into
account gas convection and conduction losses as well as solid
conduction through the chip?

Also, I would like to be able to verify the results by measuring
the temperature distribution on a real device.  I guess this
involves some form of scanning optical pyrometer or magnifying
thermal imager.  Does anyone know of or offer a service to do this?

With thanks,
Jan Kowal