Either a capacitance or a conductance level switch can be supplied to meet the specific needs of the customer.
Default.
The standard on the BOSS unit uses a conductance type level switch.
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Conductance Level Measurement Principle: High frequency sound waves are transmitted across a transducer gap in the presence of a liquid medium, but are attenuated when the gap is dry. |
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Capacitance Level Measurement Principle: As media rises and falls in the tank, the amount of capacitance developed between the probe and the ground reference rises and falls. This change in capacitance is compared to the adjustable set point and changes the state of a relay when they are equal. |