A USB temperature data logger can look like a simple plastic tag, but the wrong one can leave you with useless records, missed excursions, or a device that cannot survive the job. A logger for a vaccine refrigerator does not need the same range, probe, alarm, or report format as one riding in a frozen goods shipment or sitting near a curing oven. The best choice starts with the environment. Then you compare the specifications that decide whether the logger will give you proof