Providing real-time operating status of tank level, pumps and other instruments associated with groundwater remediation systems, the Messenger GMU8120 remote monitoring unit (RMU) supports remote predictive maintenance, while reducing equipment downtime, labor and costs associated with field equipment repairs. This remote terminal unit (RTU) also retains detailed historical information of equipment operations that can be used to improve new equipment designs and provide proof of operation to end-users. Configurable to a wide variety of sensor types and expandable to 16 inputs, the rugged unit from Global Monitoring tracks a variety of parameters such as liquid level, pressure, temperature and flow to perform various remote control tasks. Upon detecting a problem, an alarm processor notifies key personnel via telephone or computer, enabling operators to cost-effectively perform equipment repairs and/or schedule preventive maintenance. Using information gathered from the RMU, service personnel better understand equipment problems before visiting the site. The RTU system communicates via standard phone-line interface, or via optional cellular data or Ethernet interfaces. It is also compatible with an optional m2mLive monitoring network for global operations and can place collected data onto a website for viewing of historical information. To reduce or eliminate ongoing communications costs, the system can share an existing phone or fax line. In addition, it operates autonomously, eliminating the need for a monthly monitoring service. Set-up and operations also do not require the expertise of a computer tech or IT professional. And should a remote monitoring unit fail, the company can send a pre-configured, plug and play replacement RMU to the site that can be installed by non-technical personnel.