Our technicians know programming, configuration, and calibrations

Our Field Technicians and Engineers are prepared to assist with a wide range of onsite or in-house industrial services. We have experience with instrumentation, control systems, and software from the industry’s leading manufacturers. Plus, with our 90+ years in the industry, you can be confident in our ability to support past, current, and future technologies.

GTH, PLC, SCADA, and HMI programming


PLC, SCADA, and HMI programming are our specialty, but we also offer programming for video recorders, temperature controllers, wireless devices, and combustion controls, as well as scaling for smart transmitters. We work closely with several of the industry’s leading manufacturers including Schneider, Aveva, Honeywell, Rockwell, and Inductive Automation to ensure we have access to the latest technical and application information.


We offer reliable calibration services designed to meet your process and quality requirements. Our Field Engineers use NIST-traceable instruments to perform gas, temperature, pressure, and level calibrations on a variety of instruments including Chart / Video Recorders, Controllers, Gas Analyzers, and Temperature Sensors. We comply with industry best practices and utilize ISA data sheets when required.

GTH Calibration Services
GTH Repair Services


We offer instrument troubleshooting and repair out of our Southern California and Northern Nevada locations. Our Service Department offers quick turnaround times, friendly service, and competitive rates, as well as a one year warranty on most instruments.

Variable Frequency Drives (VFDs) • Transmitters • Analyzers
Programmable Logic Controllers (PLCs) Chart & Video Recorders
Operator Interface Panels Temperature Controllers • Multimeters & Calibrators

Industry Certifications