LM34 or LM35 will work too. A cap from signal to ground for longer distances and good to go.
Like the Microchip MPC9701 these are also linear. Your harsh environment is not a problem. Good for around 300 F.

Industry standard? I use the LM34 in thermo wells at the plant where I work. One has an average temp 250 F. One degree resolution, no problems. We must be Non- standard.

Lots of options.