In the competitive landscape of 2026, the OPTIFLUX 1100 stands out as the premium "economical" choice. While maintaining the lightweight wafer-style (sandwich) design for space-constrained installations, it offers a significant accuracy boost to ±0.3%, making it the go-to solution for machine building (OEM) and high-standard utility monitoring.For installations with even tighter piping constraints where required straight runs are impossible, the [Rosemount 3051SFC Conditioning Orifice Flow Meter] provides a specialized alternative without sacrificing accuracy.
In the demanding sectors of 2026, the KROHNE OPTIFLUX 1100 is recognized not just as a meter, but as a robust asset for global maritime compliance and uninterrupted industrial utility management. Its reliability is built upon high-grade materials and a rigorous suite of international certifications.
The OPTIFLUX 1100 is a preferred choice for naval architects and marine engineers worldwide. It is specifically engineered to withstand the unique rigors of life at sea, holding certifications from all major classification societies, including DNV, ABS, LR, BV, CCS, RINA, and KR.
Vibration and Shock Resistance: Marine engine rooms are environments of constant high-frequency vibration. The 1100’s fully welded, compact wafer construction and reinforced internal structure prevent zero-point drift, ensuring accurate readings despite the mechanical stress of ship propulsion systems.
Corrosion-Proof Seawater Handling: In Ballast Water Treatment Systems (BWTS) and scrubbers, instruments face aggressive saline spray and chemical additives. The reinforced PFA liner in the OPTIFLUX 1100 features exceptionally low permeability, protecting the internal sensor components from salt-air ingress and chemical erosion.
Standardized Global Integration: With a wafer design compatible with EN, ASME, and JIS flange standards, the OPTIFLUX 1100 ensures rapid, "plug-and-play" replacement in any international port, minimizing vessel downtime.In offshore fire-fighting or ballast water systems, pairing the OPTIFLUX 1100 with a [Rosemount 3051S In-Line Pressure Transmitter] ensures continuous pressure integrity monitoring in extreme saline environments.
For industrial plants, the OPTIFLUX 1100 bridges the gap between economic feasibility and high-end performance in utility monitoring (Water, Cooling, and Effluent).
NAMUR NE 107 Smart Diagnostics: Adhering to the NAMUR NE 107 standard, the OPTIFLUX 1100 provides real-time device health status (e.g., maintenance required, out of specification, or failure alerts). This allows plant managers to move from reactive to predictive maintenance, reducing unplanned outages by up to 80%.
Hastelloy® C Chemical Integrity: Equipped with high-grade Hastelloy® C electrodes, the meter maintains excellent electrical contact even when measuring untreated industrial wastewater or agricultural runoff containing trace fertilizers and abrasive particles. This prevents scaling and ensures stable measurement over years of operation.
IP68 / NEMA 6P Protection for Flood Zones: For installations in underground pits or outdoor utilities prone to flooding or extreme condensation, an optional fully potted IP68 version is available. This ensures the electronics remain bone-dry even under continuous submersion, a critical reliability factor for municipal water networks.
| Certification Body | Abbreviation | Primary Region / Sector | Compliance Scope |
| Det Norske Veritas | DNV | Global / Europe | Maritime, Oil & Gas, Wind |
| American Bureau of Shipping | ABS | USA / Americas | Naval Engineering & Safety |
| Lloyd's Register | LR | UK / Global | Energy & Marine Inspection |
| China Classification Society | CCS | China / Asia | Technical Standards & Surveys |
| Bureau Veritas | BV | France / International | Testing, Inspection, Certification |
| Korean Register | KR | South Korea / Asia | Marine Environmental Safety |
| Parameter | Specification Detail |
| Measurement Principle | Electromagnetic (Inductive) |
| Measuring Accuracy | ±0.3% of Measured Value (MV) ± 1 mm/s (Industry Leading)（If your application requires high-precision mass flow measurement instead of volumetric data, explore the [KROHNE OPTIMASS Coriolis Flowmeters] for superior accuracy in custody transfer.） |
| Repeatability | ± 0.1% |
| Measuring Range | 0.05 to 12 m/s (0.16 to 40 ft/s) |
| Turndown Ratio | 1000:1 (Ensures accuracy at ultra-low flow rates) |
| Medium Conductivity | ≥ 5μS/cm (Standard); ≥ 20μS/cm (De-ionized water) |
| Component / Condition | Technical Data |
| Nominal Diameter | DN10 to DN150 (3/8" to 6") |
| Liner Material | Reinforced PFA (with integrated stainless steel mesh for vacuum resistance) |
| Electrode Material | Hastelloy® C (Standard); Optional: Tantalum, Titanium, Platinum |
| Housing Material | Aluminum die-cast (Polyurethane coated); Optional: Stainless Steel |
| Process Pressure | Max 16 barg / 232 psig (Optional 40 barg for specific OEM versions) |
| Process Temperature | -25 to +120°C (-13 to +248°F) |
| Category | Compliance / Certification |
| Marine Approvals | ABS, BV, CCS, DNV, KR, LR, NK, RINA, CRS, IRS, PRS, RS |
| Ingress Protection | IP66/67 (Standard); IP68 / NEMA 6P (Optional for continuous flooding) |
| NAMUR Compliance | NE 107 (Self-diagnostics), NE 21, NE 43, NE 53, NE 131 |
| Vibration Resistance | According to IEC 60068-2-6 (Ideal for Ship Engine Rooms) |
| Signal Type | Description |
| Analogue Output | 4…20 mA with HART® 7 |
| Discrete Outputs | Configurable Pulse, Frequency, and Status (Electrode error, Empty pipe) |
| Digital Protocols | Modbus RS485 (Optional for OEM integration) |
| Grounding | Virtual Reference Technology (Grounding rings not required) |
The choice depends on your requirement for precision and certification:
Accuracy Requirements: If your process demands a tighter tolerance than $\pm 0.5\%$, the OPTIFLUX 1100 (± 0.3%) is the necessary upgrade.
Marine Use: For any maritime or offshore installation, the 1100 is mandatory due to its full suite of Marine Type Approvals.
OEM Applications: Its compact design is specifically optimized for integrated skids and machine building where space is at a premium.Note: If your project involves a Safety Instrumented System (SIS) requiring SIL 2/3 certification, the [KROHNE OPTIFLUX 4400] is the mandatory choice for compliance.
Centering the Wafer: In a sandwich installation, proper alignment between flanges is vital. Misalignment can create turbulence, affecting the high-precision $\pm 0.3\%$ reading.
Grounding for Stability: Utilize the Virtual Reference option to eliminate the need for grounding rings, reducing the overall installation footprint and potential leak points.
Straight Run Requirements: To achieve peak performance, maintain a minimum of 5D upstream and 2D downstream straight pipe sections.
The OPTIFLUX 1100 is a "zero-maintenance" device with no moving parts to wear out. To comply with quality audits, use the OPTICHECK service tool for on-site verification. This allows you to confirm the meter's health and conductivity diagnostics without shutting down the process.
Q: What makes the OPTIFLUX 1100 suitable for marine engine rooms and ballast water systems?
A: The OPTIFLUX 1100 holds type approvals from major classification societies including DNV, ABS, LR, and CCS. Its fully welded compact wafer construction resists heavy vibrations, while its reinforced PFA liner with low permeability handles aggressive saline environments and vacuum conditions flawlessly.
Q: How does Virtual Reference technology reduce the overall footprint and installation cost?
A: KROHNE’s Virtual Reference eliminates the need for additional grounding rings or straps. The converter interprets the electrode potentials directly, which dramatically reduces procurement costs and installation space, especially in tight OEM skids and machine-building layouts.
Q: Can the OPTIFLUX 1100 handle vacuum conditions in industrial pipelines?
A: Yes. Unlike standard economical meters, the OPTIFLUX 1100 features an embedded stainless steel mesh within its PFA liner. This mechanical reinforcement prevents the liner from collapsing or peeling away, even under severe vacuum conditions or thermal cycles.
Q: What should I do if my piping configuration cannot meet the 5D upstream and 2D downstream straight runs?
A: If your installation space is too confined to maintain standard straight runs, the OPTIFLUX 1100's ±0.3% accuracy may be affected by turbulence. For such severe spatial constraints, we recommend integrating a specialized conditioning orifice plate solution like the Rosemount 3051SFC Conditioning Orifice Flow Meter as an alternative flow management option.
