Surveyor™ Automated Cargo Level Monitoring
By Non-contact Microwave Radar or Temperature Compansated Absolute Pressure Sensors
Surveyor™ Cargo Level is a complete automatic level gauging and cargo monitoring system for tankers. The system is one of the most comprehensive and accurate systems available for this specific application. Together with advanced signal handling and computer technology, the functions included are as follows:
- Level gauging in cargo, slop, ballast, and fuel oil tanks
- Density measurement in cargo, slop, and fuel oil tanks (only with pressure sensors)
- Vapour (inert gas) pressure in cargo and slop tanks
- Draft measurement
- Loading computer for on/offline stability and stress with load planning
- Print out of cargo and transfer reports
- Interface for communications with other systems available
- High level and overfill
- Pump and valve control system
As all parts and functions are based on the same sensor technology, the system is very cost effective and operationally efficient for the users. The modular and compact design makes the Surveyor™ Cargo Level an attractive alter- native for new-building or retrofit installations. Separate ballast gauging systems or complete cargo tank systems available for installations on board any type of vessel. Surveyor™ Cargo Level has been successfully installed on board chemical and oil tankers as well as product and container vessels and recognized as a cost- effective, reliable and user-friendly system.
Non-contact Microwave Radar
One the few marine microwave ullage gauges featuring power and 4-20 mA signal on a two core cable, thus providing for simple, fast and cost effective installation for both new-buildings and retrofit projects. Because of its unique design and technology there is no need for large and tall adapter trunks in order to fit radar to deck.
System provides for automatic trim and list correction and allows exported level either at flotation center of the tank, at the sensor location or at the sounding pipe.
Radar Applications
Crude Oil Tanks
FPSO Tanks
Chemical / Products Cargo Tanks
LNG Tanks
Deck / Slop Tanks
Solids Cargo Tanks
Ballast, Fuel and Service Tanks
Advantages
High accuracy in all kinds of cargo.
Compact design and easy installation.
Superior technology allowing fitting close to tank side and on smaller tanks as well.
For Chemical and Oil/Products tank installations a special PTFE flange seal provides a non stick surface that eliminates cargo build-up on the radar antenna.
Measuring in solid cargoes that previously could not be done accurately with radar.
Technical details:
- Measurment range: up to 35 meters (solids: 70 m)
- Accuracy: +/- 3 mm
- Applications: Any kind of liquid / solids
- Process fitting: flange (typical DN80)or thread 2.5"
- Process temperature: -200 ... 400 C (-40 ... 400 C at the electronics)
- Process pressure: -1 ... 160 bar
- Emitting frequency: K / C Band
Cargo Pressure Sensor with Integrated Temperature Monitoring
For Cargo Level Monitoring SURVEYOR™ offer an option of using pressure sensor technology giving accurate information through direct measuring of cargo level, temperature, vapour pressure and cargo density. Our pressure sensors have a track record of long time stability and accuracy. The system is recommended for installation in cargo tanks, ballast tanks, fuel oil tanks and for draft measurement. The sophisticated and user friendly on/offline loading calculator is capable of presenting hull stress and stability calculations, allowing printouts of cargo transfer reports, and is an integral part of the system.
The highly accurate pressure sensors measure absolute pressure. Sensors are hermetically sealed without any ventilation to the atmosphere. Reference is made through an additional sensor, which reads the atmospheric pressure on a continuous basis. Temperature measurement is integrated in the sensors for correction of the pressure reading, and they provide also for a separate temperature monitoring feature.
Advantages of Surveyor™ Cargo Level Monitoring:
- Directly measures cargo weight, temperature, density
- Empty tank detection also at high trim
- Not affected by liquid movement
- Not affected by foaming cargoes
- Not affected by high viscous cargoes
- No planned maintenance
- Calibration data stored in the sensor
- Sensor specially designed for marine applications
- Maintenance free intelligent absolute pressure sensors with temperature compensation.
System
- Fully windows network
- Can be used as stand alone or be inte- grated to the main control system
- Can be utilized for applications like tank vapour pressure, ballast monitoring, or full on-line monitoring and control of liquid cargo, ballast, fuel, fresh water tanks, draft, trim and list.
- Consistency of level and temperature measurement to the highest standards for continuous accuracy.
- High accuracy and reliability
- Easy installation
- Can handle virtually unlimited number of tanks.
Technical data
Pressure Sensor:
- Tank height: up to 40m 1)
- Min/max tank vapour pressure: - 100mbar/+ 300mbar 1)
- Temperature range: -25°C to 130°C (-10°F to 280°F) 1)
- Density range: 0,5 to 2.5 t/m3
- Accuracy Weight and level: +/- 0.05 % of sensor range
- Temperature: +/- 0.5°C (+/- 1°F)
- Over pressure: 5 times FRO
- Burst pressure (<1sec.): 20 times FRO (typical 53 bar)
- Density: +/- 0.15 %
- Tank pressure: +/- 0.1 %
- Sensors: Inconel 625
- Pipe: AISI 316L or better
- Applications: All types of chemicals and hydrocarbons
- Protection, in tank: IP68
- Protection, on deck: IP66 (junction box)
- Junction box: AISI 316
- Interface to control unit: Serial line
- Intrinsically safe: II 1 G EEx ia IIC T4
1) Other ranges on request
Complies with:
IMO:SOLAS 74, IBC, BCH
codes
EC directives 89/336/EEC
SOLAS regulation 59,
pressure montitoring as
alternative to secondary relief
valve for the tank cargo
venting system.
