What are the differences and application scenarios between radio frequency admittance and fork-type level switches?
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Hello everyone, I would like to ask about the differences between radio frequency admittance and fork-type level switches, as well as the situations in which each of them is suitable for use. I have a project that requires alarms for high and low levels in the limestone powder silo. Usually, we opt for radio frequency admittance level switches, but the client insists on using fork-type level switches. I’ve looked up some information online and consulted manufacturers as well; there are many different opinions. The manufacturer recommends using radio frequency admittance level switches; fork-type level switches are generally used for liquids. I’m posting this here in the hope that everyone will contribute their ideas and speak up actively. Thank you all!
For powder levels, it is preferable to use radio frequency admittance sensors; the probes of fork-type sensors are quite sensitive to vibration amplitude. If the material is sticky, the relay may not activate, but this problem does not occur with radio frequency admittance sensors. Previously, some customers insisted on using fork-type sensors as recommended by the design institute; however, false readings occurred, and it was only by switching to our radio frequency admittance sensors that these errors were resolved. Fork-type sensors are generally better suited for measuring small particles or liquids with good fluidity, while lime powder tends to absorb moisture and become sticky, making it difficult to use such sensors in such cases
Using a tuning fork for solids is not good – it tends to accumulate material and causes false readings； It uses radio frequency technology but is not resistant to impacts; a large piece of material falling on it could render it useless ； Models with anti-rotation features are also prone to material buildup. In short, none of them are very useful; using just one point for judgment is definitely inaccurate – multiple points must be used for assessment. In terms of price, the tuning forks and RF types are similar, while the resistance-rotation type is cheaper.