How is an online pH monitoring system composed?/
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What is the composition of an online pH monitoring system? A sensing electrode + transmitter + control instrument? Or a detection electrode + control display instrument?
In summary, it consists of three parts: a pH detector + a converter, transmitter, or controller (with different names) + installation accessories (optional). If broken down: Detector – glass electrode + reference electrode + temperature electrode (temperature sensor). Converter – can be two-wire or four-wire, explosion-proof or conventional; it may also have control functions including PID regulation, as well as intelligent communication capabilities ； Installation accessories – can be immersion type, flow cell type, suspension type, or direct-insertion type
An important part is missing: the preliminary preprocessing.
2# What is generally used to measure the pH value of a reaction kettle with qugd? Is it immersion type or suspension type? Can electrodes and PH controllers from different manufacturers be used together? Urgently waiting for a reply. Thank you
What is the difference between the 2-wire and 4-wire versions of the 2# qugd converter, and in what situations are they used? I’m not quite sure. Need an answer urgently. Thank you
5# rujimmy: External power supply – four-wire system; internal power supply – two-wire system. Media with not very high temperatures and pressures do not require preprocessing, and a flow cell is generally used in such cases.
Is a reaction kettle an open vessel? Is there stirring on top? If there is stirring at the opening, use a fixed insertion type; if there is no stirring, an insertion type or a suspension type can be used. For containers without openings, it is recommended to use a flow-through installation
7# mzhao1981 is not an open-container; it has a stirrer inside
Could the poster provide the process conditions along with the medium parameters, etc.? The application of an online analyzer is not isolated, but is related to the conditions mentioned above. If you are not very familiar with these things, first consult your company’s technical staff to determine the requirements and parameters that need to be specified.