How to choose the right, cost-effective sensor has always been a headache for engineers. In order to select the best liquid level sensor, we not only need to understand the properties and state of the liquid to be measured, but also the advantages and limitations of different detection methods in order to select the most suitable sensor. In particular, with the development of science and technology, the increase in automation has been promoted. In order to ensure the consistency of product quality, the era of the production process that has been manually monitored and intervened has gone, and the importance of sensors has become increasingly apparent. More and more involved in the design of the program system is no longer a simple mechanical, rough type of monitoring; therefore its requirements in addition to the reliability, stability, while requiring simple installation, debugging, compact size, application Diversification and so on. In addition, due to the complexity and variability of the liquid level detection environment, it also brings different challenges to the application of sensors. For example: high-viscosity liquid height detection, level monitoring of wastewater containing impurities, level measurement with foam, highly corrosive liquid height alarms, and the like. Faced with the above problems, the market offers a variety of effective solutions for different applications. This article describes the application of level sensors in the filling industry in terms of food, beverages, and petrochemicals.
Application of Liquid Level Sensor in Filling Food
In recent years, the filling of liquids has a wide demand in food. At present, it is mainly used for volume quantification to realize, mainly including flow filling and weigh filling. However, in practice, there is an accuracy error in the bottles used for filling. In particular, the dimensional tolerances of the glass bottles are large, resulting in a large difference in the volume of the bottles. After the same volume or dizzy product is filled into the bottle, the liquid level shown is Inevitably, not only does the litigation fee holder feel that the product is of a low grade, but even worse, the manufacturer may consider the manufacturer to be short of two, which will affect the sales of the product. For the transparent container, in order to allow the liquid level inside to appear on the shelf uniformly, the requirement of level positioning and filling is proposed. Liquid level filling is a device that can precisely stop the filling after the filling liquid reaches a specified level. It is composed of sensors and extensions to the mechanism. Through the PLC control, the valve can be accurately opened and closed.
Level sensor for level measurement in beer filling
In the beer production process, the level measurement of beer filling is one of the main indicators of quality control. Using the liquid level detection sensor, it can realize the automatic measurement of the liquid level of beer to achieve the purpose of timely, accurately and effectively controlling the filling level. It can not only meet the normal operation of the beer filling machine and guarantee the quality of the filling, but also can reduce the work. The labor intensity of personnel, timely provide quality decision-making data, improve beer automation information management.
Application of Liquid Level Sensor in Liquid Level Detection of Oil Tank
Tanks are commonly used storage equipment for oil depots, oil terminals, oil refineries, and petrochemical enterprises. They mainly measure parameters such as liquid level, temperature, density, and pressure (pressured tanks), and calculate the volume of the fluids. Weight reserves. Generally, the oil tanks are divided into trade tanks and intermediate tanks. The level, temperature, density, volume, and quality of the trade tanks must be constantly monitored and measured, and the precision requirements are high. The intermediate tank usually only monitors the parameters such as the liquid level, temperature and pressure (pressured storage tanks) to prevent tank top-falling and pump-out accidents, and does not require handover measurement. The precise liquid level in the oil depot of the depot is not very important. Instead of the fluid level, the user actually needs to know the actual quantity of oil in the tank (ie, tons) by measuring the fluid level to prevent overfilling. For different sizes and types of oil storage tanks, the performance characteristics of the liquid level sensors used are also not the same. Therefore, according to the actual situation of the users and the investment requirements, a liquid level sensor is reasonably selected so as to achieve the most reasonable cost performance.
Through the above understanding of the properties and status of the fluids to be measured in the filling industry, for different applications, the company provides the UK SST low-cost optoelectronic level sensor/optical level switch - LLC200A3SH. The sensor utilizes the principle of reflection and refraction of light at two different media interfaces to provide a single point of liquid level detection. Specifically designed for high-volume OEM customers, the sensor contains an infrared emission source and a detector, the installation position is precise, to ensure that both are in the air Achieve good light coupling. When the tapered end of the sensor is immersed in liquid, infrared light will be transmitted out of the cone surface, and the light intensity reaching the detector will be weakened. This is a new type of contact point liquid level measurement and control device. In application, the photoelectric liquid level sensor has nothing to do with the other characteristics of the medium, such as temperature, pressure, density, and electrical parameters, so the liquid level detection is accurate, the repeatability is high, the response speed is fast, and the liquid level control is very accurate. Photoelectric probes are relatively small in size. Multiple photoelectric sensors can be installed on a measuring body to create multi-level liquid level sensors and transmitters. All the components inside the photoelectric liquid level sensor are encapsulated by resin, and there are no mechanical moving parts inside the sensor. Therefore, the sensor has high reliability, long service life, and maintenance-free. The sensor can also be free from debugging and verification-free installation. Can be applied. Therefore can be used for various types of low-viscosity clean liquid key points, upper and lower limit or multi-point liquid level accurate and reliable measurement monitoring, display alarm, fixed-point control and gas / liquid two-phase interface or oil-water interface identification. Photoelectric level sensors can be widely used in chemical, petrochemical, chemical fiber, fertilizer, food, medicine, transportation and military industries in the production, storage and transportation of a variety of liquid tanks, storage tanks.
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