Alloy manufactures and engineers a variety of thermowells including: standard threaded thermowells for 1/4"; heavy-duty threaded thermowells for 1/4"; standard threaded thermowells for 3/8"; heavy-duty threaded thermowells for 3/8"; socket-weld, design thermowells for 1/4" and 3/8"; heavy-duty, socket-weld design thermowells for 1/4" and 3/8"; flanged thermowells for 1/4" and 3/8"; tapered flanged thermowells for 1/4" and 3/8"; limited space thermowells for 1/4" and general purpose test for 3/8"; standard threaded for industrial glass thermowells; van stone thermowells 1/4" and 3/8"; 1-1/2" diameter weld-in thermowells; sanitary type thermowells; tantalum jackets and teflong thermowells. The company also manurfactures Navy thermowells and metric thermowells.

Omega manufactures a line of thermowells that includes heavy-duty threaded, socket-weld design, flanged, van stone, and standard threaded thermowells for 1/4 inch and 3/8 inch diameter elements. The company also produces sanitary thermowells; commodity thermowells; standard threaded thermowells, for metric elements and industrial glass thermometers; and PFA-coated and solid PFA thermowells.

C-Temp manufactures standard threaded thermowells, for 1/4" and 3/8" diameter elements and glass thermometers; heavy-duty threaded thermowells, for 1/4" and 3/8" diameter elements; limited space thermowells, for 1/4" diameter elements; general purpose test thermowells, for 3/8" diameter elements; socket-weld thermowells, for 1/4" and 3/8" diameter elements; bar stock, weld-in thermowells; flanged thermowells, for 1/4" and 3/8" diameter elements; and van stone thermowells, for 1/4" and 3/8" diameter elements.

Pyromation manufactures thermowells that are available as seperate components or as part of a complete temperature sensor assembly. The company produces a variety of thermowell types including: threaded, van stone, socket-weld, weld-in, flanged, connected and limited space.