Level Sensor

What is a level sensor?

High-quality ATO level sensors is for sale, and we offer various types and functions of level sensors. A level sensor is a device used to detect and measure the height of liquid or solid materials, widely used in industries such as industrial automation, petrochemicals, water treatment, food and beverage, and pharmaceuticals. It can not only monitor the liquid level height in real time, but also detect other media such as oil, sewage, rainwater, etc., and transmit the data to the control system to achieve automation control, improve production efficiency, and prevent overflow or drying problems.

Working principle of level sensor

Level sensors detect the level of liquids and other fluids and fluidized solids, including slurries, granular materials, and powders that exhibit an upper free surface. Substances that flow become essentially horizontal in their containers (or other physical boundaries) because of gravity whereas most bulk solids pile at an angle of repose to a peak. Level sensors can be divided into two categories based on different measurement principles: contact type and non-contact type. Contact type level sensor: It directly contacts the liquid and other fluids measures the level through float, capacitance, conductivity, radar and other methods. For example, a float level sensor uses the float to change its electrical signal as the level rises and falls, thereby detecting the height of the level. Non contact level sensor: using technologies such as ultrasound, radar, or laser, the level can be calculated through reflected signals without direct contact with the measuring object.

For example, an ultrasonic level sensor determines the level by measuring the time difference between the ultrasonic pulse from the sensor to the level.

The main types of level sensors

• Ultrasonic level sensor: Using ultrasonic reflection to measure liquid level, suitable for non-contact measurement, suitable for corrosive or high viscosity liquids.
• Radar level sensor: Using microwave or guided wave radar technology, it has high accuracy and is suitable for harsh environments and high temperature and high pressure situations.
• Capacitive level sensor: Using changes in dielectric constant to detect liquid level, suitable for various liquids and solid materials.
• Floating ball level sensor: Detects the level through changes in the position of the floating ball, has a simple structure, and is suitable for applications such as water tanks and oil tanks.
• Optoelectronic level sensor: Detects the level through the refraction and reflection changes of a light beam, commonly used in small containers or precision control applications.
• Pressure type level sensor: Calculates the level height through changes in liquid column pressure, suitable for applications such as water treatment and tank monitoring.

Application areas of level sensors

• Water treatment industry: Used for water level monitoring of water tanks, water pools, sewage treatment, etc.
• Petrochemical industry: Monitor the liquid level of oil tanks and chemical storage tanks to prevent overflow or drying up.
• Food and pharmaceuticals: Ensure precise control of liquid raw materials during the production process to improve product quality.
• Industrial manufacturing: Used for level detection on automated production lines to improve production efficiency.
• Agricultural irrigation: Used for water level monitoring and automated control of irrigation systems.

Key factors for selecting level sensors

• Measuring medium: Different sensors are suitable for different types of liquid or solid materials, such as water, oil, corrosive liquid, etc.
• Measurement range: Select a sensor with an appropriate measurement range based on the height of the container.
• Accuracy requirements: Different application scenarios have different requirements for measurement accuracy. For example, industrial production requires high accuracy, while ordinary water tank monitoring can accept lower accuracy.
• Environmental conditions: Consider factors such as temperature, pressure, corrosiveness, dust, etc., and select sensors with appropriate materials and technologies.
• Installation method: Different sensors have different installation methods, such as top installation, side installation or submerged installation.

Level sensors play a crucial role in modern industry and daily life, improving production efficiency, reducing costs, and ensuring safe operation. Choosing the appropriate level sensor based on specific application requirements will help achieve more accurate level monitoring and intelligent control. If you have any questions about purchasing, you can contact us.