The following figure shows the structure of the ground terminal: The above-mentioned reliable ground terminal design has been applied to products such as vibration level switches (fork level switch, tuning fork level switch and vibrating rod level switch) and RF admittance level switches that are counted as automatic production. Shenzhen Jiwei Automation Technology Co., Ltd. is always paying attention to every detail in product R&D to ensure reliable product performance and stable operation. The above is related to the "Reliable Grounding Terminal Design in Level Switches". For more information on level switches or magnetic flip level gauges, please pay attention to WeChat public number: Jiweimeter. (The article is taken from:, please indicate the source.)
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Level switches, especially liquid level switches, are commonly used to measure corrosive liquids. They are widely used in harsh environments such as chemical plants, power plants, and sewage treatment plants. It is particularly important to be able to reliably ground them. In industrial production, most of the on-site instrumentation measurement equipment uses aluminum alloy casing for cost considerations. In order to prevent corrosion, equipment manufacturers often apply anti-corrosion paint on the casing. But in the vicinity of the grounding terminal can not be painted anti-corrosion paint, otherwise it will greatly affect the grounding effect, if the grounding terminal is not coated with anti-corrosion paint, no paint is vulnerable to corrosion and oxidation, and ultimately lead to unreliable grounding effect.
Based on the above reasons, it is very important to design a reliable ground terminal to make a level switch that meets the safety standards. In order to ensure the reliability of the grounding terminal and achieve a good grounding effect, it is usually necessary to start from the material selection and design.
First of all, starting from the material of the grounding terminal, select 316L stainless steel, which is a characteristic material with anti-oxidation and anti-corrosion properties, as the grounding terminal to eliminate the potential for poor contact due to oxidation and corrosion of the material.
Secondly, in the structural design, the grounding terminal and the aluminum alloy casting of the meter housing are nested into one body, and the outer surface of the terminal is processed into a knurled structure so that the terminal and the housing are fully combined to improve the contact property and the shell of the liquid level switch is reached. The purpose of reliable grounding. In this way, the aluminum alloy housing can be completely covered with the anti-corrosion paint, leaving only the 316L stainless steel ground terminal not to be coated with anti-corrosion paint to ensure that the grounding terminal will not be easily corroded and oxidized. March 15, 2023