Liquid level switches and water level gauges are relatively common liquid level measuring instruments. So, in the face of various liquid level switches and water level timing, what is the secret? This article introduces the purchasing skills of liquid level switches and water level gauges as follows.1. Clarify the type and chemical characteristics of the measured medium.The physical and chemical properties of different media are different, and the requirements for instrument selection are different, which directly affects the accuracy and reliability of the instrument measurement. Especially the temperature of the medium, corrosiveness, adhesion, and presence or absence of impurities are all important considerations. If the temperature is high (for example, above 150, or even above 250), it is necessary to buy a high-temperature liquid level measuring instrument. If the measured liquid is relatively corrosive, the purchased instrument should use strong corrosion-resistant materials, or need anti-corrosion coating. If the viscosity of the tested medium is too high (for example, attached to the instrument probe), it is recommended to purchase a non-contact measuring instrument. If the test medium is a general acid-base solution, water, oil and other liquids, you can buy a contact measuring instrument.2. Understand contact measurement equipment and non-contact measurement equipmentAfter knowing the properties of the measuring medium, you can select an appropriate level measuring instrument as the target. Anti-corrosion, I am very familiar with high temperature. But many people don’t know which are contact type and which are non-contact type measuring instruments. Generally speaking, the typical instruments for contact measurement include auxiliary zone water level gauge, magnetic reflection plate water level gauge, cathodic level switch and so on. Typical instruments for non-contact measurement include radar water level gauges and ultrasonic water level gauges.Understand continuous measurement and switch measurement equipmentAccording to the different output modes, the water level measuring instrument can be divided into two types: continuous measurement and on-off measurement. Continuous measurement can detect changes in water level in real time and continuously measure. Liquid level switches can only use switching capacity, can only monitor and control points, and cannot measure continuously. Therefore, when you need to observe water level changes in real time, you need to purchase continuous level measuring instruments such as float water level gauges, magnetic reflector water level gauges, etc., and when you need to monitor and control points, you need to purchase tuning fork level switches, photoelectric level switches and other switches for measurement. instrument.
As you can see, different media and working condition characteristics, and different measurement requirements have a great influence on the choice of water level measuring instrument. When we buy a liquid level switch and a water level timer, we must integrate the above factors to make the purchased liquid level meter adapt to the on-site construction situation and measurement requirements.
Post time: 21-09-21