The Sentinal PRO remote monitoring system from Sensaphone supports the Modbus communications protocol (RTU/485 and TCP) and includes a second relay output. The system monitors, delivers alarms and data logs input/output points from third-party Modbus sensors, transducers and programmable logic controllers. Alerts are sent via phone, email or text. Data values can be viewed in real time via www.sensaphone.net or the Sensaphone iPhone/Android app. 877/373-2700; www.sensaphone.com.