Capacitance Level Probes for Refrigerants
Capacitance Level Probes for Refrigerants (1994)-Liquid level controls for refrigeration have been primarily used in industrial and large commercial systems, especially where evaporators are flooded rather than directly expanded. Due to environmental considerations and the increasing cost of refrigerants, more complete measurement and monitoring of refrigerant liquid levels in various sections of the system are being implemented. Systems no longer should contain excessive reserve amounts of refrigerant; this will require early detection of refrigerant inadequacy due to losses or system changes. Other fluids and applications are discussed in brief detail to introduce other possible applications associated with our industry. To help understand where and how liquid refrigerant capacitance level probes might be used, this paper discusses previous types of level controls, and examines some of the common applications. The construction of the probes is also briefly reviewed.
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