Overview
The OPTIWAVE 7400 is a 2-wire 24 GHz radar (FMCW) level transmitter for liquids in harsh environments like tanks with agitators containing corrosive media. It is particularly designed for continuous, non-contact level measurement under extreme conditions prevalent in the chemical, petrochemical, power, metal or oil and gas industry. The device features Metallic Horn antennas as well as PTFE and PEEK Drop antennas for measuring distances up to 100 m / 328 ft. The Drop antennas are perfectly suited for aggressive liquids in tanks. In applications with toxic and dangerous products, this radar device can be equipped with a METAGLAS® second sealing barrier.
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
- Distance piece for non-ex applications with molten salt or other high temperature liquids of up to +700°C / +1292°F
-
PTFE or PEEK Drop antennas:
- Insensitive to condensation
- Small beam angle (4° with DN150 / 6″ PTFE antenna)
- Ellipsoidal shape and smooth surface to minimise scaling
- PTFE flange plate protection for corrosive media
- New DN100 / 4'' Drop antenna for distances up to 80 m / 262.5 ft
- 316L Metallic Horn antennas with optional purging system
- Heating / cooling systems to prevent crystallisation or build-up in Metallic Horn antennas
-
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
- METAGLAS® second sealing barrier for toxic and dangerous liquids
- Antenna extensions to suit any nozzle length
- Empty tank spectrum function eliminates false reflections caused by tank internals
- Large choice of flange and thread connections
- Quick Coupling system permits removal of the converter under process conditions and 360° rotation for easy reading of display
- Converter compatible with all OPTIWAVE 7300 C flange 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 agitated and corrosive liquids |
| 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 |
| Ambient temperature |
-40…+80°C/ -40…+176°F |
| Measuring point | Pressurised tank, Open tank, Stilling well |
Operating conditions
| Process pressure |
-1…100 barg/ -14.5…1450 psig |
| Process temperature |
-50…200°C/ -58…+390°F Special version (on request): Up to +700°C/+1292°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): DN40…200 ASME (B 16.5): 1½…8″ JIS (B 2220): 40…200A |
| Pressure ratings |
EN (1092-1): PN100 ASME (B 16.5): Cl 1500# JIS (B 2220): 10k |
| Thread connections |
Male: G1½ 1½ NPT |
Approvals/Standards
| Certificates/Approvals Others | NACE, WHG, CRN / ASME B31.3 |
| Certificates/Approvals Ex | ATEX, cQPSus, IECEx, NEPSI, EAC Ex |
| 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 2420 
BR 1753 
US 1156 
SG 561 
MX 353 
GB 337 
IN 324 
CA 267 
