The invention discloses a high precision low maintenance
pH meter, which includes a shell, a wiring terminal structure and components as well as a
signal acquisition and
processing system. The wiring terminal structure includes a
signal terminal board and a
signal terminal, the signal terminal board and the components are located in the shell, the wiring end of the signal terminal is located outside the shell, the front of the shell is provided with a hanger, and the front side of the signal terminal board is equipped with a signal shielding aluminum cover. The high precision low maintenance
pH meter provided by the invention not only can protect components and the circuit from
external liquid and gas
corrosion, but also has the characteristics of convenient production and
processing, low making cost, convenient installation and wiring, good heat dissipation effect, good
mechanical stability, and wide application range, can "see" the measurement
balance point of a sensor very visually, can judge the sensor performance visually, reduce the requirement for the
professional skills of users, and improve the correction accuracy and measurement accuracy, lower the probability of incorrect use of a correction solution during correction, and especially can achieve better effect under an outdoor measurement condition and in high precision requirement measurement fields.