Seeking advice on the selection of level gauges

For situations involving a mixture of solid and liquid in a flat-bottomed tank, as well as the addition of viscous solids to the liquid, it is recommended to use a float-type level gauge or a differential pressure level gauge. These two types of level gauges can adapt well to the properties of the materials they are used with, and they are widely employed in industrial production. The specific choice of level gauge depends on a comprehensive consideration and evaluation of factors such as the properties of the liquid, operating conditions, and measurement accuracy. For more professional selection advice, you can consult the technical staff of relevant manufacturers or level gauge suppliers. .

I have used a float-type level gauge for about a month; a thick layer of solid material covered the float, preventing it from rising

If the float of a float-type level gauge is covered by solid material, preventing it from rising, it is recommended to clean the float promptly to ensure the proper operation of the level gauge. Mechanical or chemical methods can be used for cleaning, with the specific procedures as follows: 1. Mechanical method: Use tools such as hooks and wire to remove the solid materials covering the float, ensuring that the float can rise and sink freely. 2. Chemical method: Some solvents or cleaners can be used to soak the float in, and chemical reactions are employed to remove the solid substances on the surface of the float. It should be noted, however, that when selecting solvents or cleaners, safety and environmental protection principles must be followed, and proper protective measures must be taken. Furthermore, to prevent similar situations from occurring, it is recommended that when using float-type level gauges, try to avoid installing them in locations that may be covered by solid materials, or use other level control devices to monitor the liquid level multiple times. .

Regarding the issue of reserved ports in differential pressure level gauges, there is one reserved port at the top. A pneumatic level gauge was also tried; due to the pressure inside the tank, a nitrogen pressure of 3 KG was used. As solid materials accumulate at the bottom, the air inlet gets blocked

For differential pressure level gauges, if it is not convenient to install them directly on the container, it is possible to provide a mounting port at the top of the container, and connect the pressure sensor and level probe to this port via pipes. It should be noted, however, that the location of the reserve port should be above the liquid surface, and it is advisable to place it at the center of the container in order to minimize the length of the pipes and reduce errors. Furthermore, in blow-type level gauges that use compressed air as a communication medium, the air inlet is indeed prone to getting blocked when the pressure inside the tank is high or when solid particulate materials can easily clog the inlet. To address this issue, it is recommended to try using contactless level gauges such as guided-wave radar level gauges or ultrasonic level gauges, in order to avoid blockages and achieve more accurate level measurements. .

In the case of flat-bottomed tanks with a coexistence of solid and liquid, as well as liquids mixed with viscous solids, it is recommended to use non-contact level gauges such as radar, ultrasonic, or external-mounted level gauges; level gauges based on laser technology can also be used. I wonder what the reasons are why radar level gauges cannot be utilized in such situations? Is it due to the dielectric constant or stirring or something else? You can discuss this with the manufacturer based on the actual situation; personally, I think there should be no problem with the radar. If nothing else works, try the RF admittance to prevent material sticking ； If that still doesn’t work, it is recommended to use a nuclear level gauge. Among imported brands, there are nuclear level gauges that emit very low levels of radiation, and thus do not require any registration or regulation; you might want to look into them. But still, try to use the regular one :)

Guided wave radar has been tested, but due to solid-related issues, its performance is not very good

Yes, it has been fixed for a long time now; there are still residual issues

Solids absorb radar signal waves, resulting in almost no reflected signal. In the case of guided-wave radars, it takes about two days for the cables to become completely covered by these solids. Conventional radars using 80G signals also produce almost no signal. The reason for this is that these solids are residues from washing processes along with some solvents, which makes things quite troublesome