Dry ice sublimates under normal conditions at temperatures of -78.48 °C. With the testo 184 T4 temperature data loggers, you can monitor the transport of pharmaceuticals with dry ice at temperatures down to -80 °C for an unlimited duration. At the destination, a quick glance at the LEDs will tell you whether the configured limits have been adhered to. For detailed information, simply connect the logger to a computer – a PDF report with all relevant data will be generated immediately. To make your work with the data loggers even more comfortable and efficient, all necessary files and information are stored directly in the testo 184 T4: configuration file, calibration certificate, user manual, and PDF report of your recorded measurement data. The measurement data storage capacity of the testo 184 T4 temperature data logger is 40,000 measurement values. The measurement interval can be freely selected from 1 minute to 24 hours. The battery life is 100 days (at -80 °C and a 15-minute measurement cycle). The testo 184 T4 temperature data logger is powered by a standard battery that can be replaced by the user. The testo 184 T4 complies with GxP, 21 CFR Part 11, HACCP, and EN 12830. Testo AG is an ISO 9001:2008 certified company and ensures compliance with the standard through both internal audits and accredited external audits. All advantages at a glance: 1. Clear alarm indication: A glance at the LEDs is enough to know if limits were violated during transport. 2. Extremely easy to use: The testo 184 T4 is intuitive to operate and can be used without special training or prior knowledge: The "Start" button begins data recording. "Stop" ends it.