9 Scientific, measuring, signaling, checking (supervision) and teaching apparatus and instruments, namely solvent inlets, rapid response solvent valves, recycle valves, safety shut-off valves, mixing chambers, purge/drain lines, injection pumps, solvent pumps, filters, guard columns, heat exchangers, in line detectors, flow meters and indicators, stirred slurry tanks, automation modules, column skid, compression systems, hydraulic pumps, hydraulic jacks, software and computers, pistons and manipulation trolley, seals, oil tanks, spectography devices, Nuclear Magnetic Resonance (NMR) devices, infrared devices, oscillograph, all for use in the field of chromatography