Precautions for installation of industrial online pH meter pH sensor
The pH sensor is installed in a conical measuring tank. A conical metering tank is drawn from the gypsum slurry discharge pipe, the metering tank is higher than the discharge pipe, and the electrode is inserted into the upper end of the metering tank, which reduces the impact and wear of the solid matter in the slurry on the gypsum slurry. electrode. This is the most commonly used method at present, and our factory adopts this installation method. The method has simple structure and convenient maintenance, but the pollution is still serious.
pH measuring device with horizontal measuring cell. Horizontal metering tank pH measuring device is a new type of metering tank. The tank body expands horizontally, the flow rate of the circulating slurry entering the metering tank decreases sharply, and the solids are precipitated. Electrodes are located in the upper layer of the "clear liquid" to reduce wear and contamination. , The metering tank is equipped with a valve. After adding the circulating slurry, close the valve and let it stand for 2 minutes. After the solid matter has settled, the pH is read. The disadvantage of this kind of metering tank is that the structure is complicated, which increases the maintenance workload and power consumption.
The above is the commonly used pH installation method at present, the purpose is to reduce the pollution of the electrode by the circulating slurry. Zui commonly uses a pH measuring device with a conical measuring tank. However, none of the current methods can be truly pollution-free, because the solid matter and oil film in the slurry will still cover the sensitive film of the pH electrode for a long time, and the measurement accuracy must also be implemented in routine maintenance.
