Unitrol Electronics, Inc.

Unitrol has been deeply involved with RESISTANCE WELDING TECHNOLOGY since 1970. Systems developed at Unitrol are the direct result of our original roots as a production sheet metal fabricating and welding shop dating back t o 1946. We truly understand the real world balancing act between quality and quantity output from a welding department.

The T. J. Snow Company is an authorized premier distributor for the complete Unitrol line of products, both controls and chillers.


Unitrol manufactures single phase and 3 phase Microcomputer solid state resistance welding control systems using either keypad or thumbwheel data entry. Controls are manufactured on a continuous production line to handle welders from 1 KVA to 3,000 KVA and larger.

For more complex welding machines, controls are offered to handle up to 15 SCR contactors and 16 solenoid valves while having the ability to do over 27,000 steps of logic.

By design, all Unitrol controls are very easy to program. You don’t have to go to programming class or have an advanced degree to become an expert on Unitrol systems.

Controls feature a minimum of components and utilize designs that eliminate wiring harnesses and other unnecessary hardware found in competitive controls. This fact allows Unitrol to offer our exclusive 5 YEAR LIMITED WARRANTY PROGRAM on all resistance welding controls.

RESISTANCE FEEDBACK BRAZING is a “niche” market for Unitrol. Our INSTABRAZE process allows closed loop temperature feedback technology to be available at an affordable price. This process can replace torch, induction, and oven brazing on many components and offers a high degree of quality control with high production speed.

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T. J. Snow is pleased to bring you SOFT TOUCH, manufactured by Unitrol. SOFT TOUCH is a fully passive, fail-safe system that provides very low electrode force when the area between the electrodes is not safe, and only applies full electrode force when when it is safe to do so. SOFT TOUCH is fully integrated into the welding process and requires absolutely no operator adjustments. The SOFT TOUCH system is available for installation on all new and existing controls.

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Because Unitrol originally ran a large spot welding department within the company, it was recognized early in the game that welding machines without proper cooling water produced questionable welds and required excessive electrode dressing and electrode replacement. This led to a companion WATER CHILLER line manufactured since 1971.

Electrode cooling research published by Unitrol has set the standard in the resistance welding industry.

A complete line of refrigerated water chillers from 1/3 ton to 50 tons are available. All chillers are balanced for resistance welding department use.

T. J. Snow is available to help you size a system to handle your shop load.

Systems are also available to cool industrial process water not connected to resistance welders. These include closed loop refrigerated and non-refrigerated (up to 100 tons) packaged units.

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