units from Analytical Instruments Corporation and Chromatograph Service Company. It supplies spare parts and accessories, including valves, vaporizer regulators, heat trace tubing, filtration components, calibration standards, and heating blankets. Service offerings include in-house repairs, on-site service, calibration, preventative maintenance, troubleshooting of sample delivery systems, and technical phone assistance. TAC-SYS also provides on-site training classes and preventative maintenance agreements for process analyzer users in industries such as oil and gas.