Apresys dl, 99 stands as the premier versatile desposable logger for cold chain monitoring applications. It is Simple to operate and comes with accurate temperature. The point by point raw data can be extracted directly from the software, Which streamlines data management. Sr. No. Dl, 25 dl, 50 dl, 99 1 max recording 25 days. Max recording 50 days. Max recording 50, 99 days. 2 sample rate 5 minute. Sample rate 10 minute. Sample rate 20 minute. 3 use for 1, 25 days. Use for 25, 50 days use for 99 days