Heat Treating Services Unlimited

 Heat Treating Services Unlimited, Inc. is a global field services and accredited testing and calibration laboratory specializing in the thermal processing industry. HTSU is the leading authority for heat treat equipment maintenance, calibration, repair, consulting, testing and training services. Since 1998, we have enabled companies to increase both uptime and overall longevity of their equipment.



  • Instrumentation Calibration
  • Temperature Uniformity Surveys/Profiles
  • System Accuracy Tests
  • NFPA Inspection Programs
  • Combustion Tuning/Optimization
  •  In-House Metrology Lab
  • ​Consulting


Company Information

 22 Ladean Court

Simpsonville, SC  29680

Phone: 888-383-4878

Fax: 864-289-0744