Melted salt tanks, also known as molten salt troughs, serve the primary purpose of storing high-temperature liquid molten salt. Within these systems, the tanks store heat energy to provide the necessary thermal energy for reactors or heat exchangers or store excess energy. Given the extreme temperature and conditions within these tanks, there’s a need for reliable level measurement technology.

High Temperature Radar Level Transmitter for Melted Salt

Melted salt, reaching temperatures of around 460°C, creates a complex tank environment, especially when mixed with steam. Most level transmitters fail to operate under these harsh conditions.

Challenges of Measuring Melted Salt Levels:

  • High Temperatures: Melted salt can reach up to 460°C, making it hard for standard devices to operate reliably.
  • Steam Interference: The presence of steam in the tank creates a complex environment, which can interfere with measurement signals.
  • Tank Conditions: The frequent temperature fluctuations and regular start-ups can affect the accuracy of level measurements.
  • Material Properties: The molten state of salt presents a challenge, different from measuring solid or regular liquid states.
  • Equipment Durability: Many devices aren’t built to withstand the extreme conditions inside a melted salt tank over extended periods.
  • Accuracy: Precise measurements are crucial, but many transmitters can’t maintain consistent accuracy under these conditions.
  • Safety Concerns: Due to the high temperatures and nature of melted salt, there’s a heightened need for safe measurement methods.
  • External Factors: Outside atmospheric conditions, like pressure and humidity, can also influence measurement reliability.

In such a demanding setting, it’s vital to have equipment specially designed to overcome these challenges, ensuring safe and accurate level measurements.

Sino-Inst’s Solution:

After extensive site inspections and numerous tests, Sino-Inst introduced a customized high-temperature radar level transmitter. This new device can measure liquid levels in temperatures from 300°C to over 1000°C, even in tough environments. It’s a big advancement in level measurement technology.

High Temperature Radar Level Transmitters

Working Conditions and Environment:

  • Ambient temperature range: -35℃ to 80℃
  • Relative humidity: ≤95%
  • Atmospheric pressure: 86~108KPa
  • Medium temperature: 400-595℃
  • Medium: Molten Salt

Performance Indicators:

  1. Measurement accuracy within the full range: <±0.1%, display resolution: ±1mm
  2. Protection level of the transmitter: IP67
  3. Response time under 200ms, tracking rapid changes in tank levels.
  4. Resistant to design pressure 1.5 times during a water pressure test.

Considering the environmental and working conditions of the solar molten salt tower-type thermal power molten salt tank, Sino-Inst selected the best products for precise, stable measurements. The 80G high-frequency high-temperature radar level gauge was chosen with specific features:

  • Enhanced with a cooling system and heat dissipator to ensure stable operation.
  • Equipped with a convex lens to prevent adhesion, ensuring measurement accuracy.
  • Radial measures that are narrow, facilitating easy installation and stability.

Key Advantages:

  1. Unaffected by atmospheric precipitation
  2. Measures boiling liquid levels
  3. Installation outside storage tanks
  4. Internal antenna with fluoroplastic lens heating protection
  5. Accurate level measurement not limited by internal temperatures
  6. Evaporation and dust don’t affect measurement
  7. Operates in ambient temperatures from -60°C to 70°C and process temperatures up to 1200°C
  8. Corrosive liquid level measurement without contact, ensuring stable measurements.

Technical Principle:

The radar level transmitter operates on the principle of time travel. It emits high-frequency pulses at the speed of light, which, upon striking the surface of the material, are reflected back and received by an internal receiver. This distance signal is then converted into a level signal.

Radar Level Measurement and guide wave radar level measurement
Radar Level Measurement and guide wave radar level measurement Image source:

Read more about: Radar Level Measurement: Measuring Principle


  • Solid measurements including powders, granules, and plastic granules with a low dielectric constant.
  • Liquid measurements, including reactor levels, steam levels, foam product levels, and more.

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If the temperature of the medium you happen to measure is relatively high, you cannot find a suitable liquid level gauge. Or you feel that the measurement accuracy of the liquid level gauge you are using is not accurate. Welcome to choose our high temperature radar level meter, you will be satisfied.

We Sino-Inst is the manufacturer of radar level meter. We offer over 30 Radar level transmitters for level measurement. About 50% of these are 80G Radar level meters.

Sino-Inst, with our vast experience as a manufacturer and supplier, is at the forefront of introducing innovative solutions for complex challenges.

For reliable and advanced high-temperature radar level transmitter solutions, choose Sino-Inst – Your trusted partner in precision and innovation. Contact us now for customized solutions!

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