The liquid level controller is a very important industrial automation control equipment, which can monitor the liquid level in real time, and give an alarm or control the liquid level according to the set threshold. In many industries, such as chemical industry, petroleum, water treatment and other fields, liquid level controllers play a vital role. Therefore, choosing a suitable liquid level controller is very critical to ensure the safety and stability of industrial production.Hongguang instrument will introduce how to choose a liquid level controller, analyze and explain from the aspects of liquid level controller type, function, applicable environment, brand, etc.
1. Type of liquid level controller
Liquid level controllers are mainly divided into several types such as float type, capacitive type, ultrasonic type and pressure type. Different types of liquid level controllers have their own advantages and disadvantages, which need to be selected according to actual needs.
(1) Float type liquid level controller
The float type liquid level controller is a relatively traditional liquid level controller to detect the liquid level through the buoyancy of the float. The advantage is that the structure is simple and easy to use, but the disadvantage is that it is easily affected by factors such as liquid fluctuations and high temperatures, and the accuracy is not high enough.
(2) Capacitive liquid level controller
The capacitive liquid level controller measures the liquid level through the principle of capacitance, which has high precision and stability. However, one electrode needs to be installed inside and outside the liquid level container, and installation and maintenance are troublesome.
(3) Ultrasonic liquid level controller
The ultrasonic liquid level controller uses an ultrasonic probe to measure the liquid level, which has the advantages of non-contact measurement and high precision, and is suitable for liquid level measurement of various liquids, liquid objects and solid objects.
(4) Pressure type liquid level controller
The pressure type liquid level controller measures the liquid level through the pressure sensor, which has the advantages of high precision and good stability, and is suitable for liquid level measurement of high temperature, high pressure and corrosive liquids.
2. Second, the function of the liquid level controller
The functions of the liquid level controller mainly include alarm, control, display and so on.
（1） Alarm function
When the liquid level exceeds the set threshold, the liquid level controller can give an alarm through sound, light flashing or signal, etc., to remind the user to take timely measures to avoid dangerous situations such as liquid level overflow.
（2）control function
The liquid level controller can also control the liquid level according to the set liquid level threshold, such as automatically turning on or off the liquid level pump and other devices to keep the liquid level within an appropriate range.
（3）display function
The liquid level controller can also display the liquid level in real time, which is convenient for users to monitor and manage.
3. Applicable environment
The applicable environment of the liquid level controller is also an important factor in the selection.
（1）temperature
Different types of liquid level controllers have different adaptability to temperature, and it is necessary to select a suitable liquid level controller according to the actual use environment.
（2）liquid properties
The physical properties of different liquids will also affect the selection of liquid level controllers, such as the viscosity and corrosiveness of the liquid, etc.
（3）Where and how to install
The installation location and method of the liquid level controller also need to be considered, such as whether it needs to be installed inside the liquid level container,
4. Brand
It is also very important to choose the brand of liquid level controller. Excellent brands usually have higher quality assurance, better after-sales service and more comprehensive technical support, which can better guarantee the user experience and production safety. When choosing a brand, you need to consider its product quality, market reputation, and after-sales service.
Choosing a suitable liquid level controller is very important to ensure the safety and stability of industrial production. When choosing, you need to consider the type, function, applicable environment, brand and other factors of the liquid level controller, and make a comprehensive comparison and consideration.
