Communications: electrical – Condition responsive indicating system – With particular system function
Patent
1993-05-17
1995-07-18
Rogers, Scott A.
Communications: electrical
Condition responsive indicating system
With particular system function
340604, 340622, G08B 2900
Patent
active
054345553
ABSTRACT:
A thermal dispersion flow/level switch includes a dual element probe assembly. Each element comprises an RTD sensor. The two RTD's are driven at different currents at a fixed ratio so that one RTD is self heated to establish a temperature differential. When a process product comes in contact with the heated sensor, the thermal differential is diminished. The differential is set to determine presence or absence of a process media and provide a change of contact state responsive thereto. In a flow application under no flow or low flow conditions, the RTDs will stabilize with a sufficient temperature differential which decreases in response to higher flow rates.
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Magnetrol International Inc.
Rogers Scott A.
Stoll Thomas L.
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