Founded in 1988 and headquartered in Bakersfield, California—at the heart of heavy oil production and thermal steam flood activities—we are a privately held corporation currently operating in California and Oman. Process Instruments is now part of the OHI Group, further strengthening our capabilities, resources, and regional presence.

As pioneers in the validation of well test systems, we have developed a simple yet state-of-the-art portable well testing solution. Our services include validation of multiphase metering systems and portable well testing solutions, with a strong focus on accurate Net Oil Measurement.

The Process Instruments Validation System Unit is a fully equipped two-phase well test system (600# ANSI), mounted on a trailer, designed to meet and exceed all technical requirements specified for customized projects.