Due to the hyper-thin margins they labor under, food retailers are famously loath to make changes in equipment or technology that has performed in an acceptable fashion — even if seemingly better alternatives are available. That continues to be true for some of the systems used to manage refrigerated and frozen cases, which take up much of the space, and consume about half of the energy, in supermarkets. One example is the case controller, which is an electronic device attached to cold ...

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