Profile: Hydra Industries Group (HIG) is an Intellectual Properties company with more than 40 new inventions protected by applications, patents, and international applications with new inventions in the development phase. Argon Welding Chamber - Sparky-II Removing the hassle factors is part of the design intent of Sparky. Fit larger pieces because the hood opens wide so that the floor of the Sparky is work-space. Smaller pieces go through the pass throughs. Up to four pass-throughs fit on a Sparky. The purge style, patent pending, pass-throughs are fast and uniquely designed for ease of use. The automated slides glide out with a push of a button. With Sparky, awkward elbow bending and straining are in the past. Of course, if you would rather not use a welding chamber, there are options. For example, ?high-temperature molten salt with cathodic protection? offers an alternative to Argon Welding Chambers like the Sparky. The molten salt part held us back.