The OPWFTG Civacon Liberty
Designed for tank trucks, tank-truck loading
stations (for top and bottom loading), storage depots
and service stations. In the event of a possible overfill
situation sensed by the Liberty sensors, the Liberty
rack monitors output relay will send a signal to a
terminal automation system, control valve, or pump,
to shutdown the loading operation.
The Liberty
The failsafe and self-checking electronic sensors
are available as 2-wire Thermistor, 2-wire quick start
Optic, or 5-wire Optic. The Liberty on-board control
monitors, with diagnostic display, offer 2-wire and
5-wire optic sensor compatibility with all other brands
of rack monitors.
The ROM
Combines overfill with
retain feature of detecting presence of liquid in a
compartment prior to loading. All on-board monitors
can also be used as stand-alone truck system to close
down tank-truck bottom valves in case of an overfull
situation. The Liberty system conforms to Atex,
Cenelec, and EN standards.
Trailer Equipment List
1 | Sensor(s): (One Per Compartment)
Plus Sensor Cable
2 | On-board Control Monitor / ROM
3 | Rack-Compatible Socket(s)
4 | Retain Bottom Sensor
Loading Rack Equipment
5 | Rack Monitor
6 | Connecting Plug
7 | Plug/Monitor Cord Set
Features and Benefits
• Overfill Detection and Bottom Empty Monitoring
in one unit
• ROM II Plus on truck monitor with top and bottom
compartment sensors, compatible with all industry
standard sensor/rack monitor formats
• Alerts driver of product in a compartment, loading
cannot proceed without activation of the reset circuit
• Bottom sensor override timer automatically cancels
timing when plug removed from socket
• ROM II Plus monitor automatically closes bottom
valves for added overfill prevention
• Support for up to 8 compartment tankers using
2-wire optic overfill and bottom sensors
• Support for up to 12 compartment tankers using
5-wire optic overfill sensors only.
• Number of installed sensors automatically
“programmed” and blocked at installation
• Compatible with four separate auxiliary input
devices (such as brake interlock, vapor return hose
connection, etc.), with individual LED confirmation
• Includes LED socket connection status for proper
connection assurance
