Share this page on Twitter on Google+ on LinkedIn on Facebook via Email Twitter Google Plus Linked In Facebook Email a link to a colleague Ashcroft Thermowells are utilized when pressure, high velocity and corrosive process media exist. This serves to isolate and protect the sensing instrument, and permits removal of a sensing instrument without shutting down the process. Flanged Thermowells Model SF, RF and HFSolid bore constructionSelection of materials Standard and customer specificationDIN and ANSI/ASME process connections Download a datasheet