The resonator utilizes a piezoelectric driven tuning fork that exhibits a large change in resonant frequency when immersed in any liquid. A "smart" microprocessor-based electronic unit keeps the sensor in a resonant state as it changes from dry to wet or wet to dry.
The resonant frequency is continuously monitored for changes created by a wet or dry sensor and an alarm is provided via relay. The RS85 should be used when the application requires optional process connections, exotic materials of construction, coatings, finishes or adjustable time delay and density set point.
Direct Replacement for Ultrasonic Gap Switches, RF Capacitance Switches, Float Switches and Other Technologies
Immune to Coating or Build-Up on Sensor
Robust Sensing Element
¾” and 1” (NPT, BSPT) Process Connections
Choice of International Flanges and Range of Tri-Clamp Fittings and Probe Finishes
with HT6 High Temp Ext.
Pressures to 2000 psig
Viscosity up to 20000 cP
Density from 0.45 to 2.0
Single or Dual Compartment Housing with Viewing Cover
Field Selectable Parameters with External Magnet or Internal Pushbuttons (Fail Safe, Density, Time Delay)
Modular Electronics with Alarm Status LED
Self-Test Diagnostics
Extended Probe Lengths to 120 in (3048 mm)
Hermetic Seal Probe and Housing
Special Alloy Sensors (Hastelloy) and Halar/PFA Coating for Chemical Resistance
Remote Mount Electronics
Low / High Pressure Packing Glands