Overview
The OPTIWAVE-M 7400 C is a 2-wire 24 GHz radar (FMCW) level transmitter for non-contact cargo level measurement. This marine level radar is a highly accurate and reliable instrument for ullage indication. Equipped with heavy-duty stainless steel housing, it is designed to withstand the roughest conditions on ships. If necessary, the signal converter of the level transmitter can be replaced during cargo operations. The Drop antenna option makes it ideal for measuring sticky/contaminating liquids or dust-laden atmospheres where product build-up is likely to occur.
Product features and options depend on device configuration: Contact us to make sure that your preferred functionality can be combined in one device.
- Cargo radar level gauge designed to operate in the roughest marine conditions
- With rugged stainless steel (1.4404 / 316L) housing and display protection
- Redundant display: ullage/level will always be shown locally
- Inert gas pressure sensor (IGP) integral part of radar flange
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Antennas:
- Horn antenna (DN100 / 4''): Stainless steel (1.4404 / 316L) or higher Molybdenum (on request)
- Drop antenna (DN80 /3'' or DN100 /4''): PP or PTFE
- Horn antenna option comes with built-in antenna purging system for cleaning without opening the tank
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TBM (Tank Bottom Management) ensures reliable measurement even in empty tanks:
- dedicated algorithms to filter and compensate for irregular radar wave reflections that occur at tank bottom when the vessel is empty
- allows for quick and easy commissioning of tanks regardless of their size, material or geometry
- Replacement of the signal converter can be done at any time, even during cargo operations without opening the tank
- Accuracy: ±2 mm / 0.1'' uncertainty
- Optimized for use with the CARGOMASTER solution for liquid cargo monitoring and alarm
Specifications
Depending on selected device configuration
General information
| Product type | Level transmitter |
| Product family name | OPTIWAVE |
| Product positioning | For liquids in the marine industry |
| Measurement variables | Distance, Level, Mass, Reflection, Volume |
| Measurement principle | Radar (FMCW) |
| Level measurement type | Continuous measurement |
| Contact to measured medium | No |
| Measured media | Liquids, Slurries, Pastes, Solids |
| Measuring range (liquids) |
0…40 m / 0…132 ft |
| Measuring range (solids) |
0...40 m / 0...132 ft |
| Measuring point | Pressurised tank, Open tank, Silo, Bunker |
Materials
| Wetted parts | Austenitic stainless steel (1.4404/316L), Molybdenum (Mo) 3%, Polypropylene (PP), Polytetrafluoroethylene (PTFE) |
Process connections
| Flange connections | EN (1092-1): DN125 |
Approvals/Standards
| Certificates/Approvals Ex | ATEX, IECEx |
| Certificates/Approvals Marine | ABS, BV, CCS, DNV, GL, KR, LR, NK, RINA |
| Ingress protection | IP66/67 |
Communication
| Analogue outputs | 4…20 mA |
| Digital outputs | HART® |
BR 68855 
US 8923 
AR 5667 
EC 3167 
TR 1823 
AU 1567 
CA 1503 
BD 1493 
