Sensaphone® now offers the cloud-based Sentinel™ PRO remote monitoring system, which provides 24/7 monitoring of unattended HVAC units, freezers, refrigerators, boilers, and chillers. The Sentinel PRO system supports the Modbus communications protocol and includes a second relay output.The Sentinel PRO system interacts with all existing sensors within a facility and provides operators on-demand, real-time status and data acquisition from any internet connected device. The system monitors, delivers alarms, and datalogs input/output points from third-party Modbus sensors, transducers, and programmable logic controllers (PLCs). Sensors can monitor temperature, humidity, pressure, pH, conductivity, water leakage, and more.