Ash powder level measurement
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For measuring the level of gray powder, where the environment is humid and caking is likely to occur, which method is more accurate for such measurements? Currently, capacitive measurement is used, but false readings can occur sometimes
The ash being moist causes instability in the dielectric constant, which makes it difficult to use capacitors and radio frequency admittances effectively. Additionally, the height of the silo isn’t mentioned; if it’s low, one could try guided-wave radar or horn-type radar. It would also be necessary to install blowing systems and larger horns. Moreover, the structure of the silo, as well as whether there are any other devices inside it, need to be taken into consideration.
The height of the silo needs to be provided, as well as the method of feeding the material – whether it is done using a conveyor belt or an air pump. If the actual measurement range exceeds 25 meters, guided wave radar should not be used, as with such solid materials, the level being too high exerts excessive strain on the guided wave cable, and installation and maintenance become difficult. High-frequency radar is recommended in such cases. If there is a lot of dust suspended inside the silo, a purge connection can be added to ensure accurate measurements.
The silo is 5 meters high, with air pumped in
Both high-frequency and guided-wave types can be used; it’s just that guided-wave systems are a bit more complicated to install than high-frequency ones
The guided wave radar we use is also fine
I’ll give it a try; I used capacitors before