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Warming/cooling units designed to warm or cool substances, materials, and/or devices in a clinical laboratory; the temperature may be adjusted below and/or above the room temperature. These units typically consist of a temperature-regulated open or closed bath (i.e., a reservoir) or, less frequently, a dry enclosure; a pump to circulate liquid; a sensor and controller to regulate the temperature and/or liquid flow; a recorder to keep track of the variations in temperature; and heating and refrigerating components. Laboratory warming/cooling units accurately maintain regulated temperature in an integral bath or dry enclosure; some units may be also capable of circulating liquid to external systems. They are used in laboratories for procedures such as crystallization and other low-temperature chemical reactions, temperature-dependent procedures, and viscosity testing.
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