Overview
The OPTIWAVE 7500 is a 2-wire 80 GHz radar (FMCW) level transmitter for demanding liquid applications involving narrow tanks with long nozzles and internal obstructions like agitators or heating coils. Its very small beam angle and negligible dead zone make this FMCW radar the optimal choice for continuous, non-contact level measurement in both extremely small and very high tanks (up to 100 m / 328 ft). The level transmitter is even able to measure through tank roofs made of non-conductive materials. Its PEEK and PTFE Lens antennas are insensitive to deposits and well suited for corrosive environments. As the antennas are flush-mounted, there is no intrusion into the tank.
Product features and options depend on device configuration: Contact us to make sure that your preferred functionality can be combined in one device.
- 2-wire, loop-powered, with HART®7
-
Flush-mounted PEEK or PTFE Lens antennas (no tank intrusion)
- Insensitive to deposit
- Small dead zone and beam angle (4° with DN70 / 2¾″ Lens antenna)
- PEEK or PTFE flange plate protections as well as a PEEK thread protection for corrosive media
- 112 mm / 4.4″ antenna extension for long nozzles
- Empty tank spectrum function eliminates false reflections caused by tank internals
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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
- ±2 mm / ±0.08″ accuracy
- Large range of flange and thread connections
- Large, backlit LCD screen with 4-button keypad for operation with bar magnet; no need to open the housing cover
- PACTware™, HART® DD and DTM provided free of charge with full functionality
- Extensive device diagnostics acc. to NAMUR NE 107
- SIL 2/3 certified for safety-related applications
- 3-year warranty
Specifications
Depending on selected device configuration
General information
| Product type | Level transmitter |
| Product family name | OPTIWAVE |
| Product positioning | For liquids in narrow tanks with internal obstructions |
| Measurement variables | Distance, Level, Mass, Reflection, Volume |
| Measurement principle | Radar (FMCW) |
| Level measurement type | Continuous measurement |
| Contact to measured medium | No |
| Interface measurement | No |
| Redundancy | No |
| Measured media | Liquids, Slurries, Pastes |
| Measuring range (liquids) |
0…100 m/ 0…328 ft |
| Measuring point | Pressurised tank, Open tank, Bypass |
Operating conditions
| Process pressure |
-1…40 barg/ -14.5…580 psig |
| Process temperature |
-50…+200°C/ -58…+392°F |
Materials
| Antenna | Polyetheretherketone (PEEK), Polytetrafluoroethylene (PTFE) |
| Gaskets | Ethylene propylene diene monomer (EPDM), Fluoroelastomer rubber (FKM/FPM), Kalrez® 6375 |
Process connections
| Flange connections |
EN (1092-1): DN50…200 ASME (B 16.5): 2…8'' JIS (B 2220): 50…200A |
| Pressure ratings |
EN (1092-1): PN40 ASME (B 16.5): Cl 300# JIS (B 2220): 10k |
| Thread connections |
Male: G¾, G1, G1½, G3 ¾ NPT, 1 NPT, 1½ NPT, 3 NPT |
Approvals/Standards
| Certificates/Approvals Others | NACE, WHG, CRN / ASME B31.3 |
| Certificates/Approvals Ex | ATEX, cQPSus, IECEx, NEPSI, EAC Ex, KCs |
| Certificates/Approvals Marine | DNV, NK |
| Certificates/Approvals Safety | SIL 2/3 |
| Ingress protection | IP66/68, NEMA4X/6P |
| NAMUR compliance | NE 107, NE 21, NE 43, NE 53 |
Communication
| Analogue outputs | 4…20 mA |
| Digital outputs | FOUNDATION™ fieldbus, HART®, Profibus-PA |
Accuracy
| Accuracy (liquids) |
±2 mm/ ±0.08 in |
VN 2164 
US 1279 
CN 929 
BR 791 
SG 526 
GB 359 
HK 331 
MX 301 
