The DS1925 iButton data logger from Maxim Integrated Products, San Jose, CA, monitors cold chain and other temperature- sensitive products or processes. With 122 kbytes of data-log memory, the device delivers high accuracy over a wide temperature range, and can measure battery life. It also retains measurements even if the battery life ends before the logger is replaced, and is made with a stainless steel enclosure to withstand harsh environments and conditions.

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