This is a used Hewlett Packard (now Agilent) 7673 Autosampler controller. This unit is a key component of a gas chromatography (GC) system, designed to handle automated sample injections for enhanced lab efficiency and data reproducibility. The controller powers on as shown in the photo, but its full functionality has not been tested. The sale includes only the controller unit itself, with no additional accessories like the injector tower, sample tray, or connecting cables. It is sold in as-is condition, ideal for a buyer who needs a replacement controller, spare parts, or is capable of testing and repairing the unit as may be needed.