Delavan - Model Captrol 500 -R.F. Capacitance On/Off Switch

"One-Touch" Button Calibration

With the utilization of our Microcontroller and Delavan`s unique Auto-Cal algorithm, calibration is accomplished with a momentary touch of a button. No special tools, complicated procedures or valuable time is needed.

Principle of Operation

The Captrol 500 Microcontroller Based Point Level Switch consists of solid state electronics mounted in a cast aluminum explosion proof enclosure. The rugged sensing element utilizes a driven guard designed to eliminate the effects of material build-up or coatings that may cause false signals.

The sensing element`s "active" 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. This change in frequency is compared to a preset value and after amplification the signal is used to actuate a relay.

• Integral or remote mount electronics
• On-board microcontroller
• One-touch button calibration
• Built-in "self diagnostics"