Microcomputer designed acidity meter, PC-3030A model, 96 * 96 microcomputer designed acidity/redox controller, large LCD display screen, with operation status and special symbol display, automatic calibration, temperature compensation and other functions, ACT and WASH light signals and unit indication. Industrial online pH meter, PC-3030 type, with electrode cleaning device contact output, can set electrode clear time, RS-485 digital interface output, can be connected to a computer for recording and control, suitable for pH monitoring in large-scale water treatment projects, electronics, chemistry, pharmaceuticals and other processes.