COAT-RESIST is a compact point-level switch with integral electronics, based on RF Admittance measurement technology utilizing a three-electrode design with active shield compensation. It is superior in performance to conventional capacitance-based systems that often suffer from false level detection due to service material adhering to the probe electrode. It offers a satisfactory solution in tough environments where service material has a tendency to coat, where there is bridging (build-up) of material between the probe electrode and side wall of the vessel, and where, material particles having electrostatic charge float in the vicinity of the sense electrode, and the vessel internal temperature is high. Such environments are often encountered in electrostatic precipitators wherein no other instruments are suited. The instrument has a built-in discharge device to protect it from the damaging effects of static electricity.

• Field selectable Fail-safe mode for High and Low level operation
• Field adjustable switching delay for probe covered and uncovered condition
• Robust in construction to withstand the rigors of plant environment
• High temperature versions available on request
• Various mounting arrangements available to suit customer needs
• Remotely mounted electronics version also available on request