Industrial pH meter is a relatively commonly used industrial instrument testing equipment, mainly used for research and development, production and manufacturing, sales, on-site installation and commissioning, technical support and operation management and other construction services of online monitoring of pollution sources. The pH meter is used as a measurement solution Analytical instruments for medium hydrogen ion concentration are widely used in industry.
The measuring part of the acidity meter is a general potentiometer or bridge. Because, the requirement for the measurement circuit is that when the whole system is switched on, the measured battery (that is, the electromotive force generated by the electrode pair) needs to be carried out without current passing through. Otherwise, it will cause electrolysis and polarization of the electrodes, resulting in measurement errors. So, that's why the compensation method is used to measure the potential.
In addition, a deep negative feedback amplifier circuit is also used in the measurement part to further increase the input impedance and reduce the output impedance, thus greatly improving the system stability.
