Selection of frequency for contactless radar level gauges
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This post was last edited by zhoudingshengs on 2023-11-21 at 13:38. Selection of frequency for contactless radar level gauges: Frequency plays an important role in determining the most suitable application type for radar level gauges. Contactless radar level gauges are classified into three different frequency bands – 6.3G, 26G, and 80G (including frequencies above 80G) – depending on the application. 1. 6.3G radar level gauge (low-frequency radar) ● Not affected by obstacles within the measurement range. ● 6.3G radar level gauges are not prone to attenuation in the presence of condensation, steam, dust, deposits, and foam. ● It is minimally affected by surface ripples or waves. ● It performs excellently when used in waveguides. ● Requires a larger antenna and spout. ● Low-frequency radar finds it difficult to measure extremely short ranges. 2. 26G radar level gauge (medium-frequency radar) ● Not affected by obstacles within the measurement range. ● It provides reliable measurements even in the presence of condensation, steam, dust, deposits, and foam. ● Less affected by surface ripples or waves. ● Small nozzles (≥1.5in) are supported. ● The 26G radar level gauge is affected by large amounts of steam (such as liquid ammonia or VCM). ● Mid-frequency radar is affected by dense foams (such as latex or syrup). 3. 80G radar level gauge (high-frequency radar) ● The narrow beam helps to avoid obstacles. ● Antennas for minitips are supported (≥3/4in). ● Supports an extremely short measurement range. ● A narrow beam requires no obstacles within the measurement range. ● Sensitive to condensation, steam, dust, accumulations, and foam. ● Very susceptible to ripples or waves. ● High-frequency radar is very sensitive to the tilt of measuring instruments (antenna tilt). ● The 80G radar level gauge is not suitable for waveguide and bypass pipes.
A non-contact radar level gauge is a device that measures the level of liquid in a container by utilizing the reflection of radar waves. The operating frequency of a radar level gauge has a significant impact on its performance and applicable scenarios. The following is a brief analysis of the applicable types for radar level gauges with different frequencies: 1. 6.3G radar level gauge (low-frequency radar) – suitable for applications where larger antenna and tank nozzle sizes are required. - The advantage is a wide beam, which is less susceptible to interference from obstacles inside the tank. - It is suitable for applications where there are minor fluctuations on the liquid surface, as well as in environments with condensation water, steam, dust, etc. - It performs well when used in waveguides. - It is not suitable for measuring very short ranges. 2. 26G radar level gauge (medium-frequency radar) – suitable for installation on smaller nozzles, as long as they are 1.5 inches or larger. - It is less affected by condensate and steam, but may be affected in an environment with a large amount of steam. - Compared to the 6.3G radar level gauge, the impact of liquid surface fluctuations is increased, but it remains small. - It is not suitable for measuring liquids with dense foam, such as latex or syrup. 3. 80G radar level gauge (high-frequency radar) – helps to avoid interference, as the narrow beam can more easily bypass obstacles inside the container. - Suitable for installation on extremely small nozzles; a 3/4-inch nozzle is sufficient. - The advantage is the ability to measure extremely short ranges. - It is sensitive to the environment such as condensate water, steam, and dust, and is not suitable for use in such conditions. - It is sensitive to fluctuations on the liquid surface and requires a relatively stable surface. - Not applicable to waveguide and bypass pipe situations. Based on these characteristics, users can select the most suitable frequency for the radar level gauge according to their specific application scenarios (such as type of material, tank structure, measurement range, existing interference sources, environmental conditions, etc.). Generally, when selecting a radar level gauge, it is necessary to take into account factors such as the performance of the gauge, installation requirements, the properties of the medium being measured, and the operating environment. .
The summary is good, but it’s important to take into account the actual conditions on site!