pressure sensors/transmitters

You can use any kind of pressure transducer if between the hot zone and the transducer you introduce a tube long enough to get at the transducer the maximal allowed temperature. Better use SS for the tube since their thermal conductivity is low. The length should take the ambient temperature into consideration. The dynamic response will be a bit modified but for low frequencies it is of no importance. It is even better if the tube has fins to increase the convective area to air.