PH and ORP sensor with protective device

Abstract

The invention provides a PH and ORP sensor with a protective device. The PH and ORP sensor with the protective device comprises a testing electrode (1) and a cable (2). A transmitting unit (3) used for transmitting data is arranged inside the electrode (1), and a receiving unit (4) corresponding to the transmitting unit (3) is arranged inside the cable (2). The electrode (1) and the cable (2) are fixedly connected through a protective jacket (5), and a screening shell (6) is arranged outside the protective jacket (5). The electrode (1) and the cable (2) are connected in a non-contact mode, meanwhile, the protective jacket (5) with the screening function is used outside for connecting, the problem of high impedance moisture caused by metal contact can be effectively solved, and measuring results are accurate.

Description

Technical field [0001] The invention relates to the field of sensors, in particular to a PH and ORP sensor with a protection device. Background technique [0002] pH is a very important parameter in the field of water quality analysis. For example, in the process of sewage treatment, the pH of water will affect the activity of microorganisms, thereby affecting the efficiency of treatment and purification. In the industrial production process, it is also necessary to adjust the pH value, such as the neutralization reaction, to make the product quality meet the specified requirements. At the same time, in environmental water quality analysis and monitoring, the measurement of ORP oxidation-reduction potential is also very important for understanding the effect of water pollution control, such as urban sewage and industrial wastewater monitoring, and various biochemical redox projects. For a water body, there are often multiple redox pairs to form a complex redox system, and its P...

AI Technical Summary

Problems solved by technology

Although electrochemical sensors such as glass electrodes have the characteristics of reusability and high reliability, there are also defects such as the signal is susceptible to electromagnetic interference, the signal drifts during long-term use, and it is difficult to miniaturize, which limits its use in physiological hygiene, high acid-base Applications in special fields such as the environment; the important research content of photochemical sensors is indicator immobilization technology, but there are also shortcomings such as indicator leakage

[0004] PH and ORP sensor systems are mainly composed of measuring electrodes, cables, and measuring transmitters. The existing PH and ORP sensors use contact metal connections between electrodes and cables. This metal contact is prone to high impedance. It will also cause moisture and leakage due to sealing, which will cause a large measurement error to the measurement results. At the same time, the metal contact also limits the length of the cable, causing inconvenience in actual operation.

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