Liquid level gauge / liquid level switch purchase instructions

The liquid level switch is a common liquid level measuring instrument, so how to shape the liquid level switch? 1. It is clear that the type of medium to be measured and the medium with different chemical properties have different physical and chemical properties, which have different requirements for the selection of the instrument, and are also directly related to the accuracy and reliability of the instrument measurement. Specifically, the temperature, corrosiveness, adhesion, and presence of impurities of the medium are all important considerations. If the temperature is high, such as greater than 150 ° C, or even higher than 250 ° C, you need to purchase a high-temperature liquid level measuring instrument. If the liquid to be tested is highly corrosive, the purchased instrument must be made of materials with strong corrosion resistance, or an anti-corrosion coating is required. If the viscosity of the measured medium is too high, for example, it will adhere to the instrument probe, it is recommended to purchase a non-contact measuring instrument. If the measured medium is a conventional acid-base solution, water, oil and other liquids, a contact measuring instrument can be purchased. 2. Know the contact measuring instrument and non-contact measuring instrument. Knowing the properties of the measured medium, we can select the corresponding liquid level measuring instrument in a targeted manner. Everyone is familiar with anti-corrosion and high temperature resistance, but for which ones It is a contact type and which are non-contact measuring instruments, but many people do not know. Generally speaking, the typical instruments in contact measurement are float level gauge, magnetic flap level gauge, tuning fork level switch, etc. In terms of non-contact measurement, typical instruments include radar level gauges, ultrasonic level gauges, and externally attached ultrasonic level switches. 3. Understand the continuous measurement and switch measurement. According to the different output methods, liquid level measurement instruments can be divided into two types: continuous measurement and switch measurement. Continuous measurement can detect liquid level changes in real time and achieve continuous measurement. The liquid level switch only has the function of switching value, and can only monitor and control the point position, and cannot achieve continuous measurement. Therefore, when it is necessary to observe the liquid level change in real time, it is necessary to purchase continuous liquid level measuring instruments such as float level gauge and magnetic flap level gauge. When it is necessary to monitor and control the point level, it is necessary to purchase tuning fork liquid Position switch, photoelectric liquid level switch and other switching measuring instruments. It can be seen that different media and working conditions, and different measurement requirements have a great impact on the selection of liquid level measuring instruments. When purchasing liquid level switches and liquid level timers, we must comprehensively consider the above factors, so that the purchased liquid level measuring instruments match the on-site working conditions and measurement needs. Related product links: Externally mounted liquid level switch

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