The switch performs monitoring, controlling and alarming of
flow rates or levels of critical fluids such as foams, emulsion layers, liquids
and slurries. Its rugged industrial design and housing provide superior
reliability and long service life under the harshest plant environments in
chemical refining, waste treatment and other industries, according to the manufacturer. The switch is a
dual-function insertion-style instrument that offers either flow/temperature
sensing or level/temperature sensing in a single device. Dual 6A relay outputs
are standard and are assignable to flow, level or temperature. The switch
relies on the specific heat transfer properties of the media to identify the interface
of different products. With its unique thermal dispersion sensing capability,
the switch monitors the interface of products with similar densities for highly
reliable control in separation tanks and other vessels. The unit can identify
the interface between any type of media including foam, emulsion layers,
liquids and slurries. The dual switch point option allows one instrument to
control two different product interfaces. Two or more switches are used to
control product discharge and intake at specified points. The switch operates
over a wide setpoint range in water from 0.01 to 0.5 FPS. Level/interface accuracy is ±0.25 inch,
and measurement repeatability is ±0.125 inch. The switch withstands operating
temperatures from -40 to 350°F, and an optional configuration is available for
temperatures from -100 to 850°F.
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