The RF Level switch operates on the basis of RF absorption. The electronic unit generates a
sinusoidal wave, applied to the electrode creating a field around it. RF environment absorption
changes (Electrical Loss) around the electrode are reflected on the changes of generator
supply current. Such changes caused by increase in level is amplified and used to actuate the
relay. Special Coat-guard amplifier is incorporated in the circuit, which will ignore the effect of
deposition.
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