HP-960FTP industrial pH meter is a high-end pH meter with a four-point alarm and a time sharing proportional control function. It connects pH sensor and measures pH and temperature in the sample water. It can also be linked with a cleaning device via an external input, extending its automatic operation time. Many types of electrodes are available to match the sample properties. Also, the feature of Time sharing proportional control function with F Zone allow to used time sharing proportional control functions, whose on-off frequency has generally been fixed, the HP-960FTP includes an control method called F Zone, whereby as the pH difference becomes smaller, it changes not just the time for which the pump injecting pH regulator is on, but also its frequency.