Thermocouples

A thermocouple consists of two wires of dissimilar metals welded together into a junction. At the other end of the signal wires, usually as part of the input instrument, is another junction called the reference junction. Heating the sensing junction generates a thermoelectric potential (emf) proportional to the temperature difference between the two junctions. This millivolt-level emf, when compensated for the known temperature of the reference junction, indicates the temperature at the sensing tip. Published millivolt tables assume the reference junction is at 0 degrees Celsius.

Style TCP Adjustable Bayonet Thermocouples:

  • Standard—ANSI Type J Grounded Junction
  • Standard Probe Material—304 Stainless Steel
  • Standard Probe Diameter 3/16″ (1/8″ optional)
  • For use up to 900°F (482°C)

 

 

 

Style TCB Base Metal Thermocouple Wire:

  • Tempco offers general purpose thermocouple elements in ANSI Type J and K.
  • The general purpose elements are available with a twisted and welded or butt-welded junction.
  • Available in 8 ga., 14 ga. and 20 ga. with standard calibration tolerances.

 

 

 

 

Style TCB Base Metal Thermocouples:

  • Base metal thermocouple elements insulated with ceramic insulators
  • Can be used to replace thermocouple inserts in industrial thermocouple assemblies

 

 

 

 

Ceramic / Silicon Carbide Prtctn Tube Assmbl.

  • Ceramic Insulator to Insulate Wires
  • Choice of Alumina 3450°F (1900°C), Mullite 3100°F (1700°C), Hexoloy SA (sintered silicon carbide) 3000°F (1650°C) or Silicon Carbide (carbon bonded) 2300°F (1260°C)
  • With or Without Threaded Process Mounting Bushing
  • Available with Double Protection Tube

 

 

 

Style TCP Compression Fitting Thermocouples:

  • Standard Calibration — ANSI Type J Grounded Junction
  • Standard Probe Material 304 Stainless Steel
  • Standard Probe Diameter—3/16″
  • For use up to 900°F (482°C)
  • One-Time Adjustable 1/8″-27 NPT Brass Compression Fitting

 

 

Style TMW Magnet Thermocouples:
This 1-1/4″ dia. 6-pole magnet thermocouple can be attached to magnetic surfaces and walls with a holding force of 25 lbs.
Note: Magnet may lose some of the holding force above 750°F (400°C).

 

 

 

Style TMB Melt Bolt Thermocouples:
  • Designed to Measure the Temperature of Plastic Stream of an Extruder or Injection Molding Machine
  • 304 Stainless Steel Construction
  • 1/2-20 UNF Thread
  • 900°F (482°C) Operating Temperature

 

 

 

Metal/Silicon Carbide Prtctn Tube Assmbl:

  • Right Angle for Over-the-Side Application
  • Cast Iron or Aluminum Head
  • Available with Metal Pipe or Silicon Carbide (Carbon Bonded) 2300°F (1260°C)

 

 

 

Style TCS Metal Protection Tube TC Assmbl:

  • Widely used in high temperature industrial process heating applications such as furnaces, ovens; and petrochemical and textile applications up to 2200ºF (1204ºC)
  • Pipe size protection tubes made with schedule 40 pipe in various steel and nickel alloys
  • Optional process mounting bushing welded on protection tube
  • Thermocouple heads are available in aluminum, cast iron or stainless steel. Explosion proof heads are also available in aluminum or stainless steel

 

 

 

Style TCN Noble Metal Thermocouples:

  • Noble Metal Thermocouple Elements ANSI Type R and S are provided in accordance with ITS90, and ANSI Type B is
    provided in accordance with IPTS-68.
  • Alumina insulators are recommended with noble metal thermocouples. All noble metal elements have a butt-welded junction & are available in 20 ga. (.032″), 24 ga. (.020″) and 30 ga. (.010″).

 

 

 

Style TNW Nozzle Thermocouples:

  • Mounted in a shallow threaded hole on the nozzle surface (there is no direct contact with material flow)
  • Grounded junction

 

 

 

OEM Replacement Thermocouples:
Tempco’s OEM Replacement Thermocouples are manufactured to OEM specifications.

 

 

 

 

 

Style TPW Pipe Clamp Thermocouples:

  • Stainless Steel Worm Drive Clamp 1/2″ wide
  • Ideal for Measuring Pipe Temperatures
  • Thermocouple Junction Grounded to Clamp

 

 

 

Style TCP Rigid Bayonet Style Thermocouples:

  • Standard—ANSI Type J Grounded Junction
  • Standard Probe Material—304 Stainless Steel
  • Standard Probe Diameter—3/16″ (1/8″ optional)
  • For use up to 900°F (482°C)
  • See Sensor Accessories for bayonet adapters and installation

 

 

Style TRW Ring Lug Thermocouples:

  • Ring thermocouples mount on a surface using an existing screw or bolt to measure surface temperature.
  • The T/C wire junction is crimped to the ring lug.

 

 

 

 

Series TCM Multipoint TC Assembly:
Multipoint Thermocouples are used in a broad range of processes and installations to monitor the temperature in multiple positions or elevations. These sensors are used in a variety of applications such as Petroleum, Chemical Processing, Furnaces, Storage Tanks and Air Flow Ducts.

 

 

 

Style TSW Shim Stock Thermocouples:
A low-profile sensor that can be placed between two surfaces

 

 

 

 

Style MTA1 MI Cable TC Assembly:
MTA: Transition to Lead Wire
Mineral insulated sheath provides flexibility to form and bend the thermocouple to meet design requirements.
Stainless steel transition with optional Strain Relief Spring
Standard epoxy potting transition provides greater moisture resistance rated to 450°F (232°C). Optional ceramic based potting rated to 1000°F (538°C). Ceramic potting not recommended with Teflon® leads, nor for high humidity applications.

 

Style MTA2 MI Cable TC Assembly:
MTA: Plug or Jack Termination

  • Pins are made with matching thermocouple alloys.
  • Standard plugs come with hollow pins as standard and solid pins as an option.
  • Standard size and miniature plugs and jacks have a 350°F (177°C) continuous and 400°F (204°C) intermittent temperature rating.
  • High temperature plugs and jacks are rated for 500°F (260°C) continuous operation and 550°F

 

 

Style MTA3 MI Cable TC Assembly:
MTA: Open Disc Termination

  • Economical termination with nickel plated brass inserts.
  • Available in sheath diameters ranging from 0.063″ to 0.250″, single and duplex construction.

 

 

Style MTA4 MI Cable TC Assembly:
MTA: Stripped Cold End

  • Standard strip length is 1⁄2 inch.
  • Stripped end sealed with resin to inhibit moisture penetration.
  • Duplex available from 0.063″ to 0.375″ diameter.

 

 

Style MTA5 MI Cable TC Assembly:
MTA: Connection Head

  • Tempco’s connection heads are gasketed to seal against moisture, dust and corrosive or hostile atmospheres.
  • Screw covers are attached to body with a plated chain.
  • Covers have lugs for tightening or loosening with a screwdriver or wrench.
  • Available in single (2-wire) or duplex (4-wire).
  • Tempco’s connection heads are available in die cast aluminum, Bakelite and cast iron in a variety of sizes from miniature for confined areas to the large universal head designed for heavy process and industrial applications.

 

 

Style MTA6 MI Cable TC Assembly:
MTA: Connection Head with 1/2″ NPT Hex Nipple

  • 1/2″ NPT Stainless Steel Process Connection.
  • Tempco’s connection heads are gasketed to seal against moisture, dust and corrosive or hostile atmospheres.
  • Screw covers are attached to body with a plated chain.
  • Covers have lugs for tightening or loosening with a screwdriver or wrench.
  • Available in single (2-wire) or duplex (4-wire).
  • Tempco’s connection heads are available in die cast aluminum, Bakelite and cast iron in a variety of sizes from miniature for confined areas to the large universal head designed for heavy process and industrial applications.

 

 

Style MTA7 MI Cable TC Assembly:
MTA: Connection Head with 1/2″NPT Pipe Nipple

  • Tempco’s connection heads are gasketed to seal against moisture, dust and corrosive or hostile atmospheres.
  • Screw covers are attached to body with a plated chain.
  • Covers have lugs for tightening or loosening with a screwdriver or wrench.
  • Available in single (2-wire) or duplex (4-wire).
  • Tempco’s connection heads are available in die cast aluminum, Bakelite and cast iron in a variety of sizes from miniature for confined areas to the large universal head designed for heavy process and industrial applications.
  • Pipe nipple is galvanized steel.

 

 

Style MTA8 MI Cable TC Assembly:
MTA: Connection Head wiht 1/2″ NPT Nipple, Union, Nipple

  • Tempco’s connection heads are gasketed to seal against moisture, dust and corrosive or hostile atmospheres.
  • Screw covers are attached to body with a plated chain.
  • Covers have lugs for tightening or loosening with a screwdriver or wrench.
  • Available in single (2-wire) or duplex (4-wire).
  • Tempco’s connection heads are available in die cast aluminum, Bakelite and cast iron in a variety of sizes from miniature for confined areas to the large universal head designed for heavy process and industrial applications.
  • Nipple-Union-Nipple is galvanized steel.

 

 

Style MTA9 MI Cable TC Assembly:
MTA: Handheld Probe

  • Coil cord lengths are available only in 1 ft. (5 ft. extended) and 2 ft. (10 ft. extended).
  • Coil cord construction is good to 221°F (105°C).
  • Fiberglass lead construction is good to 900°F (482°C).
  • Teflon® insulated lead construction is good to 392°F (200°C).

 

 

Style TTM with Transmitter & Connection Head:
  • 4-20mA Programmable Linear Output Transmitter
  • Available with Spring-Loaded Sheath
  • For field programming of the temperature transmitter see Part Number ETM90006 in Sensor Accessories
  • Transmitter Accuracy of +/-0.2% of temperature span
  • 1/2″ NPT Process Connection

 

 

 

Style TCS for Thermowells & Protection Tubes:

  • Ceramic Insulator to Insulate Wires
  • Galvanized 1/2″ Pipe Nipple & Union
  • Cast Iron or Aluminum Head
  • Used with Thermowells and Protection Tubes

 

 

Style TTW Tube & Wire Thermocouples:

  • Economical & versatile for a variety of applications.
  • For use up to 900°F (482°C).
  • Optional process fittings available
  • Available with single or dual element.

 

 

Style TTW Wire Thermocouples:

  • An economical insulated wire thermocouple with exposed junction

 

Excel Automation Inc.