• Remote mount electronics
• On-board microcontroller
• One-touch button calibration
• Built-in “self diagnostics”
• Universal power supply 115, 230 Volts AC or 24 Volts DC
• Status indication LED’s
• Adjustable sensitivity
• Adjustable time delay
• Field selectable fail-safe modes
• Built-in static suppression
• Explosion proof design
• 3/4” stainless steel N.P.T. and flange mounting
• Sensing probe lengths to 50 Ft.

PURPOSE
Delavan’s Captrol 500-R is a cost effective Mount Microcontroller Based R.F. Capacitance On/Off Switch used in powder bulk solid and liquid applications.

”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 500R Remote Mounted Microcontroller Based Point Level Switch consists of remote mounted 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.