The Sentinel Series is a Battery Operated Remote Tank Monitoring system that delivers reliable daily measurements that are both scheduled and event driven. Remote monitoring with the Sentinel is exceptionally flexible, eliminating the hassles of network infrastructures and Internet service. The Sentinel connects via a wireless signal to local cellular networks and transmits level, alarms, battery status, rate of consumption history, critical high or low level alerts and signal strength, all of which are available through the Sentinel cloud based website. The Sentinel online provides you with important data readily at your fingertips on your computer, tablet or smart phone.