So which High temperature level sensor should you choose? This needs to be chosen based on your actual measurement parameters. Next, let’s analyze it together.

Featured High Temperature Level Sensors

Different types of high temperature level sensors

There are many types of level sensors. Different types of liquid level gauges can withstand different temperatures. In order to save you time in purchasing, we have compiled here the high temperature parameters that various level meters can withstand.

Types	Maximum Temperature Parameter	Applicable Environment
Ultrasonic level sensor	Ultrasonic level meters made of conventional materials can measure media at 60°C. Made of polytetrafluoroethylene, it can reach 80℃.	Suitable for liquids. Not ideal for highly turbulent surfaces.
Hydrostatic Pressure level sensor	The conventional configuration is up to 80℃, and the temperature can be customized up to 300℃.	Ideal for liquids in closed tanks.
Differential Pressure  level transmitter	The capillary tube of the double flange (differential pressure) liquid level transmitter should have thermal insulation measures. In order to meet the temperature requirements of the measurement medium during the selection process, the capillary filling liquid is divided into low temperature (-40~149℃) filling liquid and high temperature (15~315℃) filling liquid.	Suitable for various fluids; measures the difference in pressure. Open storage tanks, closed storage tanks, and pressurized storage tanks can all be measured.
Capacitive  level sensor	-50-250℃; By adding heat dissipation components and changing the wetted material, you can customize high-temperature models of 200℃~800℃;	For detecting liquids and granules. Not suitable for highly conductive media.
Magnetic Float  level sensor	-20℃~120℃~200℃ Max.	Used for liquid level detection in tanks.
Magnetostrictive  level transmitter	-40°C-320°C	High precision, suitable for various fluids.
Guided Wave  level sensor	-200～400℃	Works well in turbid, viscous, or foam-covered liquids.
Radar level meter	80℃ – 450℃ (for general radar sensors)	Suitable for both liquids and solids with varying surface conditions.
Custom High-Temperature Radar level meter	Specific to custom requirements. Can be customized to 600℃, 800℃, up to 1000℃. However, depending on the measurement environment, it may be necessary to configure cooling assistance, such as water, liquid nitrogen, etc.	For extreme temperature environments or specific industrial applications.

Of course, this summary is mainly based on the high-temperature level sensors produced and supplied by our Sino-Inst. The level sensor types and temperature parameters provided by other manufacturers are not necessarily the same.

Liquid level measurement under high temperature conditions is nothing more than three solutions.
The first is the replacement of materials.
The second is to add cooling structural parts.
The third is to add cooling assistance, such as water, liquid nitrogen, etc.

If you need to measure high-temperature liquid level and don’t know which level sensor to choose, you can contact our sales engineers for consultation.

High temperature water level measurement

The temperature of water, the boiling point of water at standard atmospheric pressure is 100°C. However, at higher pressures, such as in a pressure cooker or industrial boiler, the boiling point of water increases. In fact, under very high pressure environments, water can exist in a liquid state up to 374°C, which is its critical temperature. So while water has a standard boiling point of 100°C at 1 atmosphere of pressure, it can exist at higher temperatures at elevated pressures.

Accurate measurement of water levels under high temperature conditions is critical across multiple industries and applications. For example, power plants, geothermal energy production, industrial processes, and HVAC systems in large commercial buildings all require water level measurement at high temperatures. In order to meet this demand, a variety of liquid level sensors suitable for high-temperature environments are available on the market, such as ultrasonic sensors, capacitive sensors, and hydrostatic pressure sensors. Different sensors vary in the temperature range they can handle.

High temperature Oil level measurement

High-temperature oils are widely used in many industrial fields. From automotive manufacturing and oil and gas extraction to food processing and chemical industries, accurate measurement of oil levels is required.

In the automotive and aircraft industries, for example, high-temperature oils are used to lubricate and cool engines, transmissions and turbines.

In the oil and gas industry, high temperature oil levels need to be measured and monitored during refining and processing.

In food processing, high-temperature oils are often used for cooking and processing of food.

Commonly used liquid level measurement techniques:

• Radar (guided wave) sensor: Measures oil level by using electromagnetic waves. Suitable for high temperature and high pressure environments, for example, it can handle temperatures from 80°C to 450°C. Even higher temperatures can be customized.
• Hydrostatic Pressure Sensor: Measures fluid level based on the pressure generated by the oil column, ideal for closed tanks and containers.
• Capacitive Sensor: Measures oil level by detecting changes in capacity and can handle temperatures from 80°C to 250°C.
• Magnetostrictive level transmitter: -40°C-320°C, measurement accuracy can be as high as 0.01% FS.

When selecting a sensor suitable for high temperature oil level measurement, it is important to consider the actual application requirements such as temperature, pressure and oil properties, as well as the accuracy and reliability of the sensor.

High temperature Tank level measurement

Large tanks for storing and handling high-temperature liquids are common in numerous industrial sectors. These liquids may be petroleum, chemicals or other industrial feedstocks that require storage at high temperatures during production. Therefore, it becomes critical to accurately and reliably measure the level of these tanks.

Why is high temperature storage tank level measurement so critical?

Safety factors: High-temperature liquids may be flammable and may also be harmful to humans. Therefore, it is crucial to ensure that liquids do not spill or leak.
Economic benefits: Accurate liquid level measurement can ensure the continuity of the production process, avoid resource waste, and improve efficiency.

Then the liquid level measurement of high-temperature storage tanks is also more complicated. When selecting a suitable level measurement technology, a number of factors must be considered. Including the properties of the liquid, tank design, temperature and pressure, etc. It is important to ensure that the chosen technology provides accurate, reliable data and ensures the safety of personnel during all operations.

In high-temperature storage tank liquid level measurement, more people will choose: high-temperature radar, high-temperature guided wave radar, capacitance, magnetostriction, or differential pressure level meter.

In fact, many times, whether our level sensors can meet the liquid level measurement under high temperature will also be related to the pressure. For example, for radar level meters, high temperature measurement and high pressure measurement cannot be satisfied at the same time. Therefore, when you pay attention to your measured temperature, you also need to pay attention to the measured pressure. We at Sino-Inst, as a professional measurement supplier, also have pressure transmitters that meet high temperature measurement for you to choose from.

Industrial applications of high temperature level sensors

High temperature liquid level sensors have a wide range of applications in industry. Here are some typical industrial application scenarios involving high-temperature fluids or materials:

1. Condensation tower: In the petroleum and chemical industries, condensation towers are used to cool and condense high-temperature gases. Accurate measurement of liquid levels in these towers ensures process continuity and prevents overfilling.
2. High-temperature molten salt: In solar heat collection and energy storage systems, high-temperature molten salt serves as the heat storage medium. Level sensors ensure that the molten salt is maintained at the proper level as it collects and releases heat.
3. High temperature aluminum liquid: In the smelting plant, liquid aluminum flows and is stored at high temperature. The use of high-temperature liquid level sensors can accurately measure the liquid level of liquid metal to ensure the stability of the casting process.
4. Molten glass: In glass manufacturing, raw materials are heated to extremely high temperatures until they melt. Accurate liquid level measurement is critical for glass molding and production.
5. High-temperature boilers: In the field of energy and power generation, water in high-temperature boilers needs to be heated under high pressure. A level sensor ensures that the water level does not get too low, preventing the boiler from overheating.
6. Chemical reactor: In some chemical processes, liquid reactants need to be heated at high temperatures. Accurately measuring the liquid levels in these reactors ensures the continuity and stability of chemical reactions.

More Level Measurement Solutions

For any industrial application involving high temperature fluids or materials, selecting the correct High Temperature Level Sensor is critical. Whether it is to ensure the safety of the production line or to improve work efficiency, accurate Level measurement is indispensable.

We at Sino-Inst are manufacturers of High Temperature Level Sensors. We have rich experience. Over the years, our High Temperature Level Sensors have been exported to various countries, including USA, Nigeria, Australia, South Africa, etc.

I hope that the introduction of this article can provide you with useful information and inspiration. Help you better understand the value and importance of High Temperature Level Sensor in industry. So you can choose the most suitable High Temperature Level Sensor.

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