chromatography-mass spectrometry systems. It upgrades pre-owned instruments with modern components to restore original operating performance and supplies complete refurbished systems from major brands such as Agilent, Waters, and Shimadzu. Baseline Scientific also offers replacement parts and subassemblies, including autosampler transports, mainboards, sampling units, inlets, and flow sensors. In addition to equipment and parts, it provides field services such as preventive maintenance plans, fixed-cost in-house or on-site repairs, instrument compliance validation, and technician training. Its service engineers work on a wide range of analytical instruments and configurations used in chromatography and mass spectrometry workflows.