In the process of automated production, liquid level detection and monitoring has always played a more important role, such as the production of food and beverage, daily chemicals, medicine, semiconductors and other industries, the cooling and lubrication of various machines, etc., the monitoring of liquid level directly affects the quality of products, and even relates to whether the production process can be carried out smoothly. And for engineers, choosing the right and cost-effective sensor has always been a headache. In order to choose the most suitable level sensor, we need to understand not only the characteristics and state of the liquid to be measured, but also the advantages and disadvantages of different level sensors in order to choose the most suitable sensor.
?
In the automated production process, the complexity and variability of the liquid level detection environment also bring different challenges to the application of sensors. For example: height detection of highly viscous liquids, level monitoring of wastewater with impurities, level measurement with foam, height alarm of highly corrosive liquids, etc. As a result, a wider variety of level sensors (capacitive, photoelectric, ultrasonic, etc.) are available, which require not only the reliability and stability of detection, but also the ease of installation and commissioning, compact size, and diverse applications. In the face of the above problems, a variety of effective solutions are provided for different applications in the market.
?
Capacitive measurement: Capacitive measurement measures the level height by detecting the change in capacitance due to the change in the liquid level or the height of the bulk material. They are available in a variety of types, including capacitive level gauges that can output analog quantities, and capacitive proximity switches, which can be mounted on the side of the vessel for non-contact detection. When choosing, it is important to note that capacitive sensors are susceptible to different container materials and solution properties, such as plastic containers and hanging materials, which can easily affect the analog output of capacitive sensors.
?
The photoelectric liquid level sensor uses the principle of optical reflection to detect the liquid level, and when there is no water, it receives all the light emitted by the transmitter and judges it as anhydrous. When there is water, the light is refracted in the water, and only a small amount of pipelines can be received, which is judged to be in the state of water, easy to install, usually with threads on the head, and can be screwed directly on the container, and the characteristics of low price, high precision and high reliability.
?
Ultrasonic measurement: Because the principle is to calculate the level height by detecting the time difference between the ultrasonic wave sent and the reflection, it is susceptible to the energy loss of ultrasonic wave propagation. They are also characterized by ease of installation and high flexibility, and can often be installed at heights for non-contact measurements. However, when used in environments containing vapor and powder layers, the detection distance will be significantly shortened, and it is not recommended to use it in absorbing environments, such as foam.
?
When choosing, we understand the advantages and disadvantages of different liquid level sensors + the characteristics and status of the liquid to be measured, so that we can choose the most suitable sensor.
?
For any questions such as product consultation, product customization, agency, technical inquiry, quotation, etc., please contact Xingyi Hotline: 400-600-4496!
?
