Delavan’s Captrol 514 is a superior integral mount Microcontroller Based R.F. Capacitance “Multi-Point” Level Switch used in liquids and powder bulk solid applications.
Principle of Operation
The Captrol 514 Microcontroller Based Multi-Point Level Switch consists of solid state electronics mounted in a cast aluminum explosion proof enclosure. The integral unit utilizes a driven guard designed to eliminate the effects of material build-up or coatings that may cause false signals.
The sensing element section is energized with a R.F. (radio frequency) signal approximately 2mHz. When the process level changes, a change in capacitance occurs resulting in a change in frequency. The change in frequency is compared to each of the previously established user set-points. Depending upon the result of these comparisons, the microcontroller with adjust (on or off) each relay.
R.F. Capacitance Multi-Point Level Switch