Zesta offers on-site temperature calibration for a variety of equipment.  Our services cover a wide range of equipment types including furnaces, heat treating and finishing equipment, environmental chambers, temperature data loggers, laboratory and test equipment, and all makes of temperature controllers for various manufacturing processes.  We are an ISO:9001 certified company. As a manufacturer of thermocouple and RTD temperature sensors, we also offer calibrated sensors complete with certificates tracable to recognized standards.


Electronic Repair

Zesta repairs temperature & process controls, SCR power controls, panel meters, electrical testers and related instrumentation at our on-site electronics repair facility.  All repairs are performed by our experienced, fully trained technicians, and are backed by a one year repair warranty.


Heater Repair

Before you discard your burned-out open coil duct heater, let Zesta perform a repair estimate.  It may be repairable at a fraction of the cost of a new unit

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On-site Commissioning and Start-up

Our technicians are fully trained and are available to support the installation and start-up of your thermal system.



Our facilities are available for user instrument training.  Let our friendly and knowledgeable staff provide your users temperature control & related instrumentation education.  On-site seminars are also available.