The Model 440 Series System was developed to monitor
tank product levels and alert pipeline personnel of a potential tank overfill. Over dedicated lines, this
duplex system continuously transmits data between the Master Terminal Unit and the Remote Pipeline Unit.
When a tank's high level monitoring device detects a high alarm or if transmission is broken, the system
alerts pipeline and terminal personnel of a problem. The system supports up to four (4)
normally open or normally closed contacts.