Nvis 901 is an advanced microprocessor based pH meter. Nvis 901 is designed for scientific laboratories and Universities. It has three point calibration, Auto temperature compensation, PC Interface, etc. Nvis 901 is a precise measuring instrument which provides resolution of 0.01 for pH and 0.1°C for temperature. PC communication software provides facility to store pH and temperature data on computer & graphs can be plotted for pH vs Time, and Temperature vs Time.