HotSpot II Thermocouple Welder for Light and Heavy GaugeWire – IOThrifty

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HotSpot II Thermocouple Welder
HotSpot II Thermocouple Welder

Thermocouple Welder - HotSpot II

Regular price $965.00 Sale

  • In Stock for FAST and FREE Delivery
  • Quick Action, Make 6 or more t/c's a Minute
  • Handles Wire Pairs as Heavy as #14 Gauge
  • Compact Design Makes it Portable
  • Economical, Freestanding Beads can be Fabricated or Junction Welded Directly to the Surface Being Sensed
  • No Need for Elaborate Set-Ups, Skip the Expense/Delay in Ordering Pre-Made t/c's
  • Easy-To-Use, Anyone Can Quickly Become Proficient, Simple Firing Button Creates the Weld
  • Front Panel Indicators/Controls Allow the Operator to Easily Monitor Status, Set Energy Level & Initiate a Weld Cycle
  • Comes with metal carrying case, 6" wire holding pliers, eye shielding protective goggles, carbon block, grounding magnet, manual

The HotSpot II thermocouple welder is designed to help solve your thermocouple fabrication needs. The welder generates an electric arc for fusing standard couple elements into freestanding beads and welds them to any thickness base metal.

Visual and sonic indicators alert the operator when the welder has cycled and is at the user selected power level. The system is powered directly from the AC line through a step-down transformer.

The principal difference between the HotSpot II and the HotSpot I is the heavier wire welding capability. The HotSpot II can handle wire pairs as heavy as #14 gauge. It can also close larger tubes than the HotSpot I and can do light duty stud welding as an aid in wire harness attachment and in insulation blanket installation.

 To Order the thermocouple welder below scroll to the top of the page then click on ADD TO CART button


comes with holding vice, diagonal cutter, miniature 5" wire holding pliers, high temperature utility cement, dressing file, extra quick release attachment ferrules, magnifier loupe




SIZE: 3.5" high, 8.5" deep, 11.5" wide (less handle)

WEIGHT: 14 lbs

STORED WELD ENERGY: 5 to 250 watt seconds

WIRE GAUGE: welds wire pairs as large as #14 J.K,E (#16 T) and as small as #36 gauge. Welds studs  #8 or lighter

CYCLE TIME: charging time at maximum energy setting is less than 10 seconds

CONTROLS: provides energy adjustment control, dual 2 position energy range switch and LED displays to indicate charging and energy storage status

POWER: uses 120 VAC 60 Hz line power (220 VAC 50 Hz is optional) Circuit protected by 3 amp breaker


The HotSpot II is powered from the AC line through a step-down transformer and rectifier. Front panel indicators and controls allow the operator to easily monitor the status of the unit, determine the level of energy to be transferred to the storage capacitors and initiate a weld cycle. The maximum power output of the HotSpot II is approximately 250 Joules. The power level is set by the position of the front panel control knob.The power ranges, normal (low) and turbo (high) are selected by a two position toggle switch. Initiation of the welding discharge is controlled by a snap action push button switch.

The range switch and power level control set the voltage to which the energy storage capacitors are charged. Peak voltage on the low range is approximately 35 VDC and on the high range 75 VDC. The stored energy is proportional  to the square of the capacitor voltage.Increasing the setting of the control knob will cause the capacitor to be charged to a higher level. However decreasing the setting will not immediately reduce the value already stored so a welding cycle will always release an energy pulse equal to the highest power setting since the last recent discharge. A resettable circuit breaker in the primary AC line is accessible on the unit's back panel and protects against damage from internal circuit shorts and similar  fault conditions.