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Hot Spot I
Thermocouple Welder

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All Categories > Thermocouple Welders > Thermocouple Welders > HotSpot Thermocouple Welders > Item # 10-A10240  
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Item # 10-A10240, International Voltage Market and Usage

List Price $689.00

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The HotSpot portable 50 joule TC welder allows thermocouple wire to be formed into freestanding bead or butt welded junctions, or to be directly welded to a metal surface.

This unit will do wire size of 20 gauge or finer ( T type 24 gauge or finer

Specifications  · Size  · Controls, Indicators, and Overload Protection  · Components Included  · Quick Action  · Economical  · Easy-to-Use  · Flexible  · HOTSPOT Users


Product Type

Thermocouple Welders

Voltage Rating

240 V


6.25 lbs

Stored Weld Energy

5 to 50 watt/sec

Wire Gauge

Welds wire pairs of #24 gauge or finer (#20 for J, K & E)

Cycle Time

Can perform 5 to 10 welds per minute, depending on energy setting.


Provides energy adjustment control, and visual and audio indication of weld charge cycle completion.


Will operate from either AC lines or self-charging internal battery. Will perform several hundred welds on charged battery. 120 VAC 60 Hz line power (220 VAC 50 Hz optional)



3.25 inches


6 inches


6.25 inches

Controls, Indicators, and Overload Protection
The power level available for welding is set by the position of the front of the control knob. This control also functions as the on/off switch. The knob is calibrated in Watt seconds or Joules. The maximum available power is approximately 50-Watt seconds. The control actually regulates the voltage to which the energy storage capacitor is charged. The stored energy is proportional to the square of the voltage, and the voltage can be varied between 15V and 80V. Increasing the setting of the control knob will cause the capacitor to be charged to the higher level. However, decreasing the setting will not reduce the value already stored, so a welding cycle will always release an energy pulse equal to the highest setting since last recent discharge.

When the internal circuitry has charged the energy storage capacitor to the level set by the control knob, the front panel LED and internal sounder are activated. These inform the operator that the unit is ready for another cycle. The sounder also helps to conserve battery energy during portable operation by reminding the operator that the welder had been left on.

A circuit breaker protects against overloads. The circuit breaker opens the low voltage AC/DC supply if excessive current is being drawn. A 1/4 Amp fuse mounted on the internal circuit board is in series with the AC power cord.

Components Included
  1. HotSpot Welder
  2. Standard 6 " Wire Holding Pliers
  3. Rechargeable Battery
  4. Eye Shielding Protective Goggles
  5. Grounding Magnet
  6. Carbon Block
  7. Instruction Booklet

Quick Action
Give up waiting for ready made thermocouple junctions, and fabricate your own with the Hot Spot welder. It's much faster than gas welding and produces a more reliable contact than mechanical twisting or clamping. The Hot Spot is so small and portable that you can use it right where you want it. And it forms and attaches junctions in one step.

Not only do you save the time of waiting for prefabricated couples, but you reduce costs by forming junctions from standard thermocouple wire. You also save the cost and effort of using clamps, brackets, glue, and other sensor mounting means

You don't have to be a welder to be a success with the HotSpot. After a little experimenting to zero-in on the best energy settings and positioning techniques for the wire type and size being used, the inexperienced operator will quickly be producing satisfactory welds

Adjustable weld power output matches the varying requirements of the thermocouple materials and wire gauges. Make butt welds, and third party or free standing junctions, all with the same device.

Abbott Labs
Advanced Cardiovascular Systems
Allegheny Ludlum Steel Corp.
Allied Bendix Corporation
Altech Specialty Steel Corp.
Aluminum Co. Of America
Amoco Chemicals Company
Analog Devices Inc.
Anheuser-Busch Inc.
A. P. Green Refractories
Appalachian Power Company
Apple Computer Company
Armour Pharmaceutical Co.
At&T Bell Labs
At&T Technologies Inc.
Avondale Shipyards, Inc.
Babcock & Wilcox
Beech Aircraft Corp.
Bethlehem Steel Corporation
Bio-Medicus Inc.
Briggs & Stratton Corp.
Brookhaven National Laboratory
Bucknell University
Burroughs Corporation
Cameron Iron Works
Carnegie Mellon University
Carolina Power & Light Co.
Caterpillar Inc.
Certainteed Corporation
China Lake Naval Weapons Center
City Of Colorado Springs
Colgate Palmolive Co.
Coca-Cola Co.
Compaq Computer Corp.
Combustion Engineering Inc.
Con Edison Co. Of New York
Connecticut Yankee Atomic Power
Continental Carbon Co.
Cooper Industries Inc. Bussmann Div.
Cornell University
Data General Corp.
David Taylor Naval Ship R&D
Detroit Diesel Allison
Detroit Edison
Digital Equipment Corp.
Eastman Kodak
Eaton Corporation
Eg&G Inc.
E.I. Dupont
Elmwood Sensors
Emerson Electric
Englehard Corp.
Erickson T.R.
E. R. Squibb & Sons Inc.
E Systems
Exxon Research & Engineering
Fiberglass Canada Inc.
Fisher Body
Fmc Corp.
Florida State University
Ford Motor Company
General Dynamics
General Instrument Corp.
General Motors Proving Ground
Genetech Inc.
Goodyear Aerospace Corp.
Goodyear Tire & Rubber Co.
Gould Electronics
Grumman Aerospace Corp.
Gte Communications Systems Corp.
Harris Semiconductor
Hatch Company Inc.
Hawaiian Electric Co. Inc.
Hercules Corp.
Hobart-Kitchen Aid
Honeywell, Inc.
Hughes Enterprises
Ibm Corporation
Ici Americas, Inc.
Inland Steel Co.
Intergraph Corporation
International Minerals & Chemicals
Iowa-Illinois Gas & Electric
Itt Neo-Dyn Aerospace Controls Div.
J I Case
John Deere Component Works
Keebler Company
Kentucky Fried Chicken Corp.
Kimberly-Clark Corporation
Kms Fusion, Inc.
Knolls Atomic Power Laboratory
Koehler Company
Lamb Weston, Inc.
Lee Data Corporation
Litton Systems Inc.
Lockheed Corporation
Lof Glass
Louisiana Pacific Corp.
Louisiana Tech University
Lower Colorado River Authority
Massachusetts Health Research Inst.
Martin Marietta Corp.
Mcdonnell Douglas
Medi-Physics Inc.
Merck & Co., Inc.
Michigan Department Of Health
Michigan State University
Miles Laboratory, Inc.
Mine Safety & Health Adm.
Minnesota Mining & Manufacturing
Morton Thikol Corporation
Motorola, Inc.
National Bureau Of Standards
National Gympsum Company
National Steel Corp.
Naval Air Development Center
Naval Research Laboratory
Naval Surface Weapon Center
Norden Systems
Nordson Corporation
Northeastern University
Northern Indiana Public Service Co.
Northern Telecom Electronics Inc.
Northrop Corporation
Oklahoma State University
Oregon State University
Owens-Corning Fiberglass Corp.
Pacific Gas And Electric Co.
Pennsylvania Power & Light Co.
Pfizer Corporation
Philadelphia Naval Shipyard
Pitney Bowes
Potters Industries, Inc.
Ppg Industries
Prestolite Electric Inc.
Proctor Silex
Public Service Company Of Oklahoma
Public Service Electric & Gas Co.
Purdue University Calumet
Ratheon Co.
Reynolds Metals Corporation
Rockwell International Corp.
Rubicon, Inc.
Sanders Associates
Sandia National Labs
Sears, Roebuck And Co.
Sharp Manufacturing Co.
Skega Ab - Sweden
Southern California Gas Co.
Sperry Computer Systems
Sprague Electric Company
Square D Company
Standard Oil Company
Stanford Linear Accelerator Center
Stanford University
Stevens Institute Of Technology
Sunbeam Appliance Co.
Tecumseh Products Company
Teledyne Total Power
Tennessee Valley Authority
Texas Instruments Inc.
Texas Tech University
Tektronix, Inc.
The Boeing Company
The B.F. Goodrich Co.
The Singer Company
The University Of Chicago
3-M Company
Titanium Metals Corporation
Union Carbide Corporation
Unisys Corp.
United Technologies
University Of Arizona
University Of Arkansas
University Of California
University Of Delaware
University Of Denver
University Of Illinois
University Of Maryland
University Of Missouri
University Of Notre Dame
University Of Pennsylvania
University Of Texas
University Of Utah
University Of Windsor
Upjohn Manufacturing Co.
U.S. Air Force - Mcclellan Afb
U.S. Army Aberdeen Proving Ground
U.S. Army - Cold Regions Research
U.S. Borax & Chemical Corp.
U.S. Dept. Of Agriculture
U.S. Dept. Of Energy
U.S. Environmental Protection Agency
U.S. Forest Service
Volkswagon Of America Inc.
Westinghouse Electric Corporation
Weyerhauser Company
Wheaton Industries
Whirlpool Corp.
W.L. Gore, Inc.
Vulcan-Hart Corporation
Zenith Electronics Corp.
Zilog Inc.


Hot Spot I Expansion Kit

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