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Environmental recorders designed primarily for storing information regarding the environmental air temperature. These recorders typically consist of a portable electronic unit which includes a mechanism for periodically sampling the temperature in the air using appropriate sensors, thermometers to measure a wide range of temperatures, and a solid-state memory capable of storing samples in the order of several thousands. Dedicated software for downloading the results in a standard computer is necessary for some recorders. Environmental air temperature electronic recorders are used for long-term recording of air temperature; they may be intended for use indoors, outdoors, or in both conditions. Some air temperature recorders use a mechanical or electromechanical mechanism to move a rotatory cylinder (i.e., chart recorders) to store the temperature information for relatively long-term (e.g., a week) recordings.
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