This bench top Orion Star A system from Thermo Scientific combines a touchscreen pH/mV meter with an integrated magnetic stir base, adjustable electrode holder and peristaltic pump–driven sample recirculation cell. Multi-port connections accommodate pH or ORP electrodes and reference probes while the flow-through cylinder and continuous mixing ensure stable readings. Includes onboard calibration routines, buffer reservoir hookup and USB data export. Ideal for accurate pH monitoring in flow chemistry, formulation work and quality-control applications.