In various industries, liquid level measurement is a crucial task. In order to achieve precise, stable, and automated liquid level measurement, liquid level transmitter have become an indispensable intelligent device. Liquid level transmitters provide high-precision liquid level measurement solutions for industrial automation, environmental monitoring, liquid storage, and other fields by converting liquid level height into corresponding electrical signals. The Hongguang instrument will provide an in-depth introduction to the working principle, composition, characteristics, advantages, and widespread applications of liquid level transmitters in different fields.
1、 Working principle of liquid level transmitter
Liquid level transmitters measure liquid level height based on different measurement principles, including pressure measurement, ultrasonic measurement, radar measurement, capacitance measurement, and magnetic float measurement. Among them, the most commonly used principle is pressure measurement.
Principle of pressure measurement:
The liquid level transmitter calculates the liquid level height by measuring the pressure of the liquid on the sensor. In general, the pressure of a liquid is directly proportional to its height. The liquid level transmitter converts liquid pressure into corresponding electrical signals through sensors, and then converts them into standard signal outputs through processing circuits, such as 4-20mA signals, for easy monitoring and control system use.
2、 Composition of liquid level transmitter
Liquid level transmitters typically consist of the following components:
（1）Sensor: used to sense the pressure or other physical quantities of liquids and convert them into electrical signals.
（2）Processing circuit: used to process the electrical signal output by the sensor and convert it into a standard signal output.
（3）Housing: Used to protect sensors and processing circuits, ensuring their normal operation under different environmental conditions.
（4）Interface: Liquid level transmitters typically have standardized interfaces for easy connection to monitoring and control systems.
3、 Characteristics of liquid level transmitters
（1）High precision: The liquid level transmitter adopts advanced sensing technology and precise processing circuits, which can achieve high-precision liquid level measurement.
（2）Wide measurement range: Liquid level transmitters are suitable for measuring liquid levels of different types and height ranges.
（3）Real time monitoring: The liquid level transmitter can monitor the changes in liquid level in real time, provide accurate liquid level data, and facilitate real-time control and management.
（4）Multiple output signals: The liquid level transmitter can output different types of electrical signals, such as 4-20mA signals, RS485 communication, etc., making it convenient to connect with different types of monitoring and control systems.
（5）High reliability: The liquid level transmitter adopts advanced sensors and processing circuits, which have high reliability and long service life.
4、 Advantages of liquid level transmitters
（1）Accurate measurement: The liquid level transmitter can accurately measure the height of the liquid, ensuring accurate measurement and quality control during the production process.
（2）Energy conservation and environmental protection: The liquid level transmitter does not need to increase fluid pressure for measurement, thereby reducing energy consumption and having a positive effect on energy conservation and environmental protection.
（3）Automation control: The liquid level transmitter can achieve automation control, automatically adjust the liquid flow rate, and improve the automation level of the production process.
（4）High reliability: The liquid level transmitter adopts advanced sensing technology and stable electronic components, with high reliability and long service life.
（5）Easy maintenance: As the liquid level transmitter has no moving parts, it is easy to maintain and reduces maintenance costs and workload.
5、 The Widespread Application of Liquid Level Transmitters
Liquid level transmitters are widely used in industrial automation, environmental monitoring, liquid storage and transportation, and other fields.
（1）Industrial automation: Liquid level transmitters are used in industries such as chemical, petroleum, power, pharmaceutical, etc. to measure and control the height of liquids in storage tanks, reactors, pipelines, etc.
（2）Environmental monitoring: Liquid level transmitters are used for liquid level monitoring in rivers, lakes, and reservoirs, as well as for liquid level management in sewage treatment plants, chemical plants, etc., to ensure the accuracy and stability of environmental monitoring.
（3）Liquid storage: The liquid level transmitter is used in liquid storage facilities such as tanks, water tanks, and oil tanks, providing real-time liquid level monitoring and alarm functions to ensure the safety and stability of liquid storage.
（4）Transportation pipeline: The liquid level transmitter is used in the transportation pipeline to monitor the liquid level, control and adjust the liquid flow in real-time, and ensure the stability and efficiency of the transportation process