Jul 13, 2022· Most of the disposable temperature data loggers on the market can work at -30℃, but our single use temperature data logger can continue to work at -40℃ according to the customer's needs. As our main product, Freshliance Fresh Tag1 has a temperature range of -40℃ to 70℃. It could cover the trip of 7,15, 30, 60, 90, 120 days even 180 ...