The ICON LevelPro Sentinel series level sensor is a cellular tank or sump level monitoring system that delivers reliable daily measurements that are scheduled and event-driven. Remote monitoring with the Sentinel is exceptionally flexible, eliminating the hassles of network infrastructures and internet service. Instead, the Sentinel connects wirelessly to local cellular networks and transmits alarms, inventory, battery status and GSM 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 smartphone.