Will the instrument "go on strike" under high temperature and high pressure? How strong is the tolerance limit of Auto radar level gauge?

Will the instrument "go on strike" under high temperature and high pressure? How strong is the tolerance limit of Auto radar level gauge?

In industrial scenarios such as chemical storage tanks, LNG storage and transportation, and heating systems, level measurement is a core link to ensure production safety and process stability - but complex working conditions such as high temperature, high pressure, and strong corrosion often cause traditional level gauges like float and differential pressure gauges to "malfunction". However, Radar Level Meter, with their non-contact measurement characteristics, have become a "powerful tool" in such scenarios.

Today, Auto radar Instrument will comprehensively analyze the underlying logic of Auto radar level transmitter, an industrial measurement "wonder weapon", from the principles, working condition limitations, and medium influences, and reveal its hard-core advantages that far exceed those of its peers.

I. What is a guide wave radar level transmitter?

A guide wave radar level meter is a non-contact level measurement instrument based on the microwave reflection principle: it emits high-frequency microwaves to the measured medium through an antenna, captures the parameter relationship between the reflected echo and the emitted wave, and accurately calculates the liquid level height in the container. It is the "main player" in the level monitoring of industrial storage tanks, reactors, and other equipment.

Auto radar level sensor has upgraded high-sensitivity antennas and intelligent signal processing chips on this basis, with stronger anti-interference ability and more suitable for complex industrial scenarios.

II. The influence of pressure and temperature

Many people think that "radar level gauges are not affected by temperature and pressure", but this is a "half-right" conclusion - microwave propagation itself is not affected, but the tolerance capacity of the instrument components becomes a limiting condition.

1. The influence of temperature

The propagation speed of microwaves in the medium is almost not affected by temperature changes. However, the sensors and antennas of the radar have a temperature tolerance limit (usually between -40 and 300℃ for different brands): if the medium temperature is too high, it will cause component aging and signal distortion.

Auto radar Advantage: Auto radar level gauge adopts high-temperature resistant special alloy antennas + multi-layer insulation coatings, and the core component's temperature tolerance range is expanded to -50 to 350℃, far exceeding the industry's conventional level.

When measuring high-temperature media, it is necessary to cool the antenna through forced air/water cooling or keep the antenna at a certain distance from the highest liquid level to avoid direct contact with the high-temperature environment.

Auto radar Instrument can provide customized cooling accessories to meet the installation requirements of different working conditions and further improve the stability of the equipment in high-temperature environments.

2. The influence of pressure

Microwave propagation is not affected by air density (vacuum / pressurized), so the radar can work in vacuum, normal pressure, and medium-high pressure environments. However, the structure of the instrument has a pressure tolerance limit (different products have different requirements): if the container pressure exceeds the allowable range, it will cause seal failure and increase measurement errors.

Auto radar Advantage: Auto radar level gauge adopts an integrated forged sealing structure + high-pressure resistant ceramic measurement window, suitable for harsh scenarios such as ultra-high-pressure reactors and deep-sea storage tanks, eliminating the risk of high-pressure medium leakage.

III. The key indicators that determine "whether it can be measured"

The measurement effect of the radar level gauge is the "interaction result" of microwaves and the medium. The following three medium characteristics are the core influencing factors.

1. Relative dielectric constant

This is the core indicator affecting microwave reflection:

The larger the dielectric constant, the higher the microwave reflection rate. If the dielectric constant is too small, microwaves will be refracted/absorbed in large quantities, causing effective echo attenuation. Generally, the medium dielectric constant of radar should be ≥1.52. With technological upgrades, some products can measure liquid hydrocarbons with dielectric constants of 1.2 to 1.9 (such as gasoline and diesel). If the medium conductivity is >10mS/cm (such as conductive liquids), microwaves will be completely reflected, and the measurement will be more stable.

Auto radar Advantage: Auto radar level gauge is equipped with low dielectric constant enhancement technology, which can accurately measure media with dielectric constants as low as 1.0 (such as liquefied natural gas and light oil), breaking the measurement lower limit of traditional radars; 1. Built-in dielectric constant automatic recognition algorithm eliminates the need for manual calibration and is suitable for multi-media mixed measurement scenarios.

2. Liquid Turbulence and Foam

Turbulent liquid surfaces scatter microwaves, and foam absorbs microwave energy, both of which cause echo attenuation. If the liquid level measurement range is small (short microwave propagation path), the attenuation effect can be ignored. If the range is large, the working conditions need to be evaluated in advance.

Advantages of Auto : Auto  radar level gauges are equipped with anti-turbulence intelligent filtering algorithms that can automatically filter out over 90% of false echoes; for high-foam media, dedicated foam-penetrating antennas are provided, increasing microwave penetration by 50% to ensure accurate capture of true liquid level signals even under foam coverage.

3. Corrosive and Crystalline Media

These media can damage probes, and typically require a separate flange structure with a  PTFE measurement window. However, it should be noted that PTFE can withstand temperatures up to 200°C; a safety distance of 100 to 800mm between the flange and the highest liquid level should be maintained to prevent crystalline substances from adhering to the measurement window and high temperatures from affecting the antenna.

Advantages of Auto : Auto  radar level gauges use a separate flange with an enhanced PFA anti-corrosion coating, which has superior corrosion resistance to ordinary PTFE, capable of withstanding strong acids, strong alkalis, strong oxidants, and other corrosive media; the coating can withstand temperatures up to 250°C, and the safety distance can be flexibly adjusted according to the working conditions, suitable for long-term stable measurement of crystalline media.

4. Compared with traditional level gauges, the core advantages of Auto  radar level gauges are:

Non-contact measurement + Super wear resistance

No moving parts, no contact wear, capable of measuring high-viscosity, highly corrosive, toxic, and sanitary media, unaffected by steam, mist, and dust. The core components of Auto  products have a service life of up to 5 years, far exceeding the industry average.

No measurement blind zone + Ultra-high precision

No "dead zone" like float level gauges, suitable for commercial metering; Auto 's dynamic precision compensation technology ensures high-precision output even during severe liquid level fluctuations.

Strong adaptability to working conditions + Intelligent operation and maintenance

Auto  radar level gauges use high-temperature resistant special alloy antennas and multi-layer insulation coatings, with core component temperature resistance far exceeding industry standards; combined with intelligent temperature compensation algorithms, measurement accuracy remains extremely high even in extreme temperature differences. Built-in remote diagnosis modules support real-time monitoring of device status via mobile phones or PCs, with a fault warning accuracy rate of 98%, reducing operation and maintenance costs.

Auto  instruments offer free working condition assessment services, recommending the optimal product model based on your actual needs and customizing exclusive measurement solutions!