How to use level sensors in the filling industry?

- Dec 20, 2019-

How to choose a suitable and cost-effective sensor has always been a headache for engineers. In order to choose the best liquid level sensor, we need to understand not only the properties and status of the liquid being measured, but also the advantages and limitations of different liquid level sensors in order to choose the most suitable sensor. Especially with the development of science and technology, the degree of automation has been promoted. In order to ensure the consistency of product quality, the era of manual monitoring and intervention by manufacturers has passed. The importance of sensors has become more and more obvious. Involved in the design of the program system, it is no longer a simple mechanical and rough monitoring; therefore, it requires not only the reliability and stability of detection, but also the simplicity of installation and commissioning, compact size, and diverse applications . In addition, due to the complexity and variability of the liquid level detection environment, it also brings different challenges to the application of the sensor. For example: high-viscosity liquid height detection, impurity level monitoring of waste water, foam level measurement, highly corrosive liquid height alarm, etc. Faced with the above problems, a variety of effective solutions are provided for different applications in the market. This article briefly describes the detection application of liquid level sensors in the filling industry from several aspects such as food, beverage, and petrochemical.


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Application of liquid level sensor in filling food


In recent years, liquid filling has been widely in demand for food. At present, it is mainly to achieve volume quantification, mainly including flow filling and weighing filling. But in fact, the bottle used for filling will have accuracy errors, especially the large tolerance of the size of the glass bottle, resulting in a large difference in the internal volume of the bottle. When the product of the same volume or heavy halo is filled into the bottle, the liquid level displayed is ups and downs, not only consumers feel that the grade of the product is low, but also that the manufacturers are short of two, which affects product sales. For the transparent container, in order to make the liquid level inside the container evenly and uniformly present on the shelf, the requirement of liquid level positioning and filling is proposed. Liquid level filling is a device that can accurately close the valve and stop filling after the filling liquid reaches the specified level. It consists of sensors and expansion mechanism, and realizes accurate valve opening and closing through PLC control.


Level sensor for liquid level measurement in beer filling


In the beer production process, the height measurement of beer filling level is one of the main indicators of quality control. Using the liquid level detection sensor can realize the automatic measurement of the beer liquid level, and achieve the purpose of timely, accurate and effective control of the filling liquid level. Labor intensity, timely provide quality decision-making data, and improve beer automation information management level.


Application of liquid level sensor in oil tank


Oil tanks are storage equipment commonly used in oil depots, oil terminals, oil refineries and petrochemical companies. They mainly measure parameters such as liquid level, temperature, density and pressure (pressure storage tanks) to calculate the volume and Weight storage. Generally, oil tanks are divided into two types: trade tanks and intermediate tanks. The liquid level, temperature, density, volume, and quality of trade tanks must be frequently monitored and measured with high accuracy requirements. Intermediate tanks usually only monitor parameters such as liquid level, temperature, and pressure (with pressure storage tanks) to prevent oil tanks from falling out and evacuating, and do not need to be handed over for measurement. The precise liquid level of the oil tank in the oil depot is not very important. What the user actually needs to know is not the liquid level, but the actual amount of oil in the oil tank (that is, tons) by measuring the liquid level, so as to prevent overflow. For different sizes and types of oil storage tanks, the performance characteristics of the liquid level sensors used are different. Therefore, according to the actual situation of the user and investment requirements, the liquid level sensor should be selected reasonably in order to achieve the most reasonable price-performance ratio.

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Through the above understanding of the properties and status of the liquid tested in the filling industry For different applications, we recommend the photoelectric level sensor FS-IR32D. The sensor uses the principle of reflection and refraction of light at the interface of two different media to provide single-point liquid level detection. The sensor is specially designed for high-volume OEM customers. It contains an infrared emission source and a detector, and the installation position is accurate. When the tapered end of the sensor is immersed in liquid, infrared light will be transmitted out of the tapered surface, and the intensity of the light reaching the detector will become weak. It is a contact point level measurement and control device. In terms of application, the photoelectric liquid level sensor has nothing to do with other characteristics of the medium, including 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. The photoelectric probe is relatively small in size, and multiple photoelectric probes can be installed on a measuring body to make a multi-point liquid level sensor. All components inside the photoelectric liquid level sensor have been resin-sealed. There are no mechanical moving parts inside the sensor, so the sensor has high reliability, long life, and maintenance-free. The sensor can also be debugging-free and calibration-free. Applicable. Therefore, it can be used for accurate and reliable measurement and monitoring of critical points, upper and lower limit points or multipoint liquid levels of various low-viscosity clean liquids, display alarms, fixed-point control, and identification of gas / liquid two-phase interfaces or oil-water interfaces. The photoelectric liquid level sensor can be widely used in chemical, petrochemical, chemical fiber, chemical fertilizer, food, medicine, transportation and military industries to produce, store and transport a variety of liquid storage tanks.