DCC Corporation manufactures a broad range of thermocouple wires, welders, and data loggers that allow customers to make their own thermocouples. Wires come in either solid or stranded types that have a maximum temperature range between 500 and 900 degrees Fahrenheit, and are available in an assortment of materials such as platinum rhodium and tungsten rhenium. Two types of welders are also sold, the HotSpot I and II, which generate electric arcs for fusing standard couple elements into freestanding beads and welding them to any thickness base metals; the main difference between the two is that the HotSpot II can handle heavier wires, up to 14 gauge. Finally, DCC sells HotMux thermocouple data loggers that monitor thermocouple and other analog signals using digitizing 8-channel modules, and can display, print, and store data via an attached desktop of laptop.

Watlow carries an array of thermocouples. General application styles include adjustable spring type thermocouples that fit a large range of hole depths and bend to any angle, and armor style thermocouples with stainless steel hoses that offer additional lead protection in demanding applications. Mineral-insulated thermocouples come in the basic cut and stripped style, wafer head Style AS, and thermowell-compatible Style AT.

Cleveland Electric Laboratories has been producing thermocouples and other sensing solutions since 1920. Their collection of industrial thermocouples includes mineral-insulated thermocouples (MgO) for use in process temperatures up to 2,400 degrees Fahrenheit, base metal thermocouple elements and assemblies that provide a variety of accuracy and response speed ratings, and plastics industry thermocouples in bayonet, variable depth, and melt bolt styles. Thermocouple protection tubes are also available in metal, ceramic (e.g., Mullite, Alumina, silicon carbine, etc.), cast iron, tercod pyrometer, and silicon carbide, for protection from corrosion, contamination, extreme temperatures, and shock.

Ari Industries offers a wide selection of thermocouples. Their standard/base metal thermocouples come with high purity MgO insulation to provide EMF stability and to minimize drift problems. Multi-level thermocouples are manufactured small enough to replace single-point thermocouples and large enough to replace thermowells.

Nordic Sensors Industrial specializes in thermocouples and other temperature measurement products like RTDs, thermowells, wires, hardware, controllers, and accessories. Thermocouples come in one of three categories. General purpose models are offered in adjustable bayonet, fixed bayonet, 45- and 90-degree bend, nozzle bolt, ring terminal, shim stock, and many other styles. Thermocouples for industrial processes include the hot runner, melt bolt (e.g. rigid, fixed, adjustable), mineral insulated, and 45- and 90-degree bend styles, among others. Heavy duty and special application thermocouples and related products include stepped or straight threaded thermowells, tapered threaded thermowells, nipple-union-nipple thermowells, bare element thermocouples, and noble metal thermocouples.

Convectronics designs an array of thermocouple types to meet almost any application need. Bare wire thermocouples are available in 6 standard configurations. Fixed and adjustable bayonet thermocouples are offered in standard J, K, T, and E base metals. Other types include nozzle, bolt style, metal sheath/MI, paddle, lug and washer, bearing, ribbon, sabre, refractory metal/ceramic, and noble metal thermocouples.

Furnace Parts manufactures MgO, base metal, and high temperature thermocouples, in addition to a variety of related accessories. Available in types E, J, K, N, and T, the MgO metal-sheathed units come in standard diameters of 0.063", 0.125", 0.188", 0.25", and 0.375" with several connection head and mounting fitting choices. Base metal thermocouples are offered in a variety of wire sizes and configurations, as well as with customizable lengths, insulators, heads, plugs, jacks, blocks, and flanges. Type R, S, B, and C high temperature thermocouples are also made by Furnace Parts; they come with a choice of ceramic, Inconel, Hastelloy, and Molybdenum sheaths. These three types of thermocouples can be applied to a wide range of industries, including steel and specialty metal fabrication, oil and gas, heat treating and thermal process, and aerospace.

Durex Industries supplies a wide selection of industrial process thermocouples to meet demanding process applications like steel processing, turbine and diesel engine temperature measurement, and chemical processing, as well as for commercial applications like food service, packaging, and semiconductor packaging. Platinum thermocouples, most commonly ANSI types R, S, and B, are used for high temperature applications, while mineral-insulated thermocouples can be made to all standard ANSI calibrations, with sheath diameters from 0.02" to 0.5" and temperature tolerance up to 2,400 degrees Fahrenheit. Miniature thermocouples are also available in addition to multi-point thermocouples for pipelines, process towers, boilers, and vessels where multi-point monitoring is important.

Tempco manufactures many styles of industrial thermocouple assemblies for a wide range of industries, from petrochemical to textile applications. They also offer general purpose thermocouple elements in ANSI types J and K, with either a twisted and welded or butt welded junction, available in 8, 13, and 20 gauge. Finally, the company sells noble metal thermocouples in types R and S; all these elements have a butt welded junction and are available in 20, 24, and 30 gauge.

MTI Industrial Sensors' general purpose MgO thermocouples are available in sheath sizes 0.01" to 0.5" in materials such as 304, 310, and 316 stainless steel, Iconel 600, platinum, copper, and titanium; single, dual, triplex, and multipoint designs are available. Ceramic beaded elements are offered in base metals J, K, T, and E, as well as noble metals R, S, and B. In addition, the company produces special purpose thermocouples to meet 3A requirements, food industry standards, and other stringent applications.

Pyromation thermocouples are made for a wide range of applications, be they industrial, general purpose, or hazardous. For example, the FD08 penetration-style thermocouple is used to monitor the internal temperatures of meat, fish, poultry, dough, and other foods; made from full hard drawn 304SS, the materials are FDA compliant for use in sanitary applications.  Another option, the industrial ID01 straight base metal thermocouple, is provided in many styles, from bare to duplex-insulated element, to insulated junction, twist weld, or tig weld. Within the full line of Pyromation thermocouples, temperature measurement is possible between -200 and +2,316 degrees Celsius.

Thermal Solutions of Texas carries a variety of general, mineral-insulated, base metal, high temperature, and multipoint thermocouples. These can be used for a number of applications, from plastic injection molding and food processing, to nuclear and atomic research, to industrial processing and heat treating. Specific options include the mineral insulated thermocouple by Watlow, which handles temperatures up to 1,200 degrees Celsius and meets or exceeds initial calibration tolerances per ASTM E 230, and base/noble metal thermocouples, which are available in straight or angle types and single or dual element, with 2- or 4-hole insulators.

M & M Control features Pyromation thermocouples and components for use in high temperature, heavy industrial processes including heat treating, forging, smelting, melting, utility and waste boilers, incineration, and cogeneration.  Leads are generally made from fiberglass, and sheaths are normally 304 stainless steel. Most assemblies are temperature rated up to 900 degrees Fahrenheit.

Temperature Measurement Systems carries a variety of thermocouple options. Types of thermocouples include industrial, miniature, bayonet, melt bolt, washer, wire-type, tube skin, engine, and cuttable. Available junction types are exposed-welded, grounded, ungrounded, and welding pad, while heads come in cast iron, cast aluminum, stainless steel, and polypropylene, as well as a variety of configurations (e.g., screw cover, hinged cover).