overview

PHS digital pH meter is a high-precision instrument used for laboratory pH measurement, with dual functions of pH and mV. Using E201 composite electrode, the reaction is fast and the stability is good. This series of instruments is widely used in many disciplines and fields such as scientific research, teaching, agriculture, etc.

Working principle

The hydrogen ion activity in the aqueous solution is converted into electrical energy by a sensor (pH composite electrode), which is input to the instrument. After being operated by an operational amplifier and current detector, the electrical energy is converted into digital display through A/D. The above electrical energy conforms to the Nernst equation:

Technical parameters and working conditions