This ultra-low temperature data logger is designed for monitoring vaccines in cryogenic dry ice storage. The measurement range is -100 to 100°C (-148 to 212°F) using the probe supplied with the logger. The device can record over 32,000 readings and the on-board display can cycle between the current, minimum and maximum temperature readings at the touch of a button. Flashing lights alert users to any temperature excursions. The logger is simple to set up using the free EasyLog software, which allows users to set their own high and low alarm thresholds, with alarm hold and delayed start features as well. Just plug the logger into your PC's USB port to download data which can then be graphed, printed and exported to other applications for detailed analysis.