Elitech(UK) Disposable USB Temperature Data Logger RC-55 is a single data logger.It is used in food, medicine and other perishable products cold chain logistics especially for large-scale use disposable data-logger providing customers with convenient, fast and safe operation of accurate data.USB Disposable Temperature Data Logger RC-55 is a single data logger.It is used in food, medicine and other perishable products cold chain logistics especially for large-scale use disposable data-logger providing customers with convenient, fast and safe operation of accurate data.