The KROHNE OPTIFLUX 1400 stands out in the market due to its innovative Multi Phase Operation (MPO) functionality. Unlike standard electromagnetic flowmeters (EMF) that fail during gas entrainment or high solid content, the OPTIFLUX 1400 maintains stable, repeatable readings even during major process disturbances. This makes it the preferred choice for slurry flow measurement, including challenging media like manure or chemical waste with high solids.
Efficiency meets safety with built-in OPTICHECK technology. The flowmeter provides over 80 device diagnostics, color-coded according to NAMUR NE 107 standards for intuitive troubleshooting. Operators can now perform Bluetooth® flowmeter verification via the OPTICHECK Flow Mobile app, generating full status reports without interrupting the process or opening the converter housing. This wireless capability significantly reduces maintenance time and improves occupational safety in confined spaces.
| Category | Detailed Specification |
| Measurement Accuracy | ±0.3% of MV ±1 mm/s (Reference conditions) |
| Repeatability | ±0.1% of MV (minimum 1 mm/s) |
| Full Scale Range | 0.4 to 12 m/s (1.3 to 40 ft/s) |
| Nominal Diameters | DN10 to DN150 (3/8" to 6") |
| Liner Material | Reinforced PFA (FDA compliant, smooth surface) |
| Electrode Materials | Hastelloy® C22 (Standard); Optional: Tantalum, Platinum, Titanium |
| Housing Material | Die-cast aluminum (with epoxy coating) |
| Measuring Tube | Austenitic stainless steel |
| Process Connections | Wafer-style (Sandwich); Compatible with EN 1092-1, ASME B16.5, JIS B2220 |
| Nominal Pressure | EN: Max. PN40; ASME: Max. Cl 300 |
| Media Conductivity | Non-water: ≥5 μS/cm; Demineralised water: ≥20 μS/cm |
| Media Temperature | Compact: -25°C to +120°C; Remote: -25°C to +140°C |
| Ambient Temperature | -40°C to +65°C (-40°F to +149°F) |
| Protection Class | IP66/67 (NEMA 4/4X/6); IP68 optional for remote version |
| Signal Outputs | 4…20 mA (HART®), Pulse, Frequency, Status, Limit Switch |
| Communication | Bluetooth® (via OPTICHECK Flow Mobile), HART® 7, Modbus |
| Advanced Features | MPO (Multi-Phase Operation), EcoMode, Virtual Reference |
| Approvals | ATEX, IECEx, NEPSI, cFMus, NAMUR NE 107/21/43/53 |
When selecting an OPTIFLUX 1400, consider the installation environment. The Compact Version (1400 C) is ideal for standard dosing skids, while the Field-mounted Version (1400 F) is better suited for locations where the converter needs to be accessible away from the sensor. For media that are prone to creating electrical noise, the Virtual Reference grounding method is a significant advantage, as it eliminates the need for expensive grounding rings.
The wafer-style design of the KROHNE OPTIFLUX 1400 is specifically engineered for space-saving.
Piping Logic: Although EMFs are robust, ensure at least 5D upstream and 2D downstream straight runs for peak accuracy.
Orientation: For slurries or liquids with solids, vertical installation with upward flow is recommended to ensure the pipe remains full and prevents sediment buildup on electrodes.
MPO Activation: Ensure MPO technology is optimized in the menu for applications involving entrained air (e.g., pumping from tanks).
With no internal moving parts, the OPTIFLUX 1400 is virtually maintenance-free. To promote sustainability, the EcoMode setting can be activated to reduce power consumption without compromising measurement integrity. Regular health checks should be conducted wirelessly using the OPTICHECK Flow Mobile app to detect electrode coating or conductivity changes before they impact production.
Compact Skid Builders & OEMs: With its ultra-short wafer (sandwich) design, the OPTIFLUX 1400 requires significantly less installation space compared to traditional flanged meters. In tight dosing skids, it reduces the overall footprint by up to 30%, making it the premier choice for mobile treatment units.
Chemical Dosing Systems: High-end ±0.3% accuracy ensures precise control of expensive chemicals like flocculants or anti-foaming agents. Combined with a reinforced PFA liner, it offers superior chemical resistance against the most aggressive acids and bases.
Agricultural & Slurry Management: For manure, mud, or high-solid waste, the built-in MPO (Multi-Phase Operation) technology resolves signal instability caused by air bubbles or particle impact, providing stable readings where other electromagnetic flowmeters (EMFs) fail.
Superior Signal Stability (MPO Technology): Standard EMFs often output errors or experience "signal jumping" when gas entrainment exceeds 5%. The OPTIFLUX 1400’s MPO functionality utilizes advanced signal processing algorithms to maintain continuous measurement even during major process disturbances.
Cost-Saving "Virtual Reference": Traditional EMFs require expensive grounding rings when installed in non-conductive (plastic) piping. The OPTIFLUX 1400 supports Virtual Reference, which balances potentials internally. This feature saves you $200–$500 per unit in hardware and labor costs while eliminating potential leak points.
Based on years of field experience, we recommend the following for optimal OPTIFLUX 1400 performance:
Installation Orientation: When measuring slurries or media prone to sedimentation, always install the meter vertically with an upward flow direction. This ensures the measuring tube remains full and prevents solids from coating the electrodes.
Straight Run Requirements: To maintain the rated ±0.3% accuracy, ensure at least 5D upstream and 2D downstream straight pipe runs. If space is extremely limited, consider using a flow straightener.
Vacuum Prevention: While the PFA liner is reinforced with a stainless-steel mesh, extreme vacuum conditions should be avoided. Ensure the pipeline design prevents sustained vacuum states after pumps are shut down.
Maintenance in 2026 is data-driven. The OPTIFLUX 1400 brings digital intelligence to your site:
Wireless Health Checks: Maintenance teams can perform verification from up to 10 meters away using the OPTICHECK Flow Mobile App. No scaffolding or confined space entry is required.
NAMUR NE 107 Compliance: Diagnostics are color-coded (Red, Yellow, Blue), allowing operators to instantly distinguish between a "Device Failure" and a "Process Disturbance" (e.g., empty pipe or conductivity change).
Instant PDF Reports: Generate verification certificates with a single tap to satisfy regulatory audits and quality tracking requirements.
Maintenance-Free Design: No internal moving parts and no obstructions mean zero mechanical wear. Typical service life exceeds 10 years without requiring replacement parts.
EcoMode Energy Savings: Support your corporate sustainability goals by activating EcoMode. This setting optimizes the excitation current, reducing meter power consumption by up to 15% without compromising measurement integrity.
Q: How does MPO technology improve measurement in slurry or gas-entrained liquids?
A: Multi Phase Operation (MPO) technology uses optimized signal processing to filter out noise caused by air bubbles or solid particles. This allows the OPTIFLUX 1400 to maintain stable and repeatable readings in disturbed flows where standard EMFs would fail or show erratic data.
Q: Can the KROHNE OPTIFLUX 1400 be installed in plastic piping without grounding rings?
A: Yes. By selecting the "Virtual Reference" option, the flowmeter's converter balances the electrical potentials internally. This eliminates the need for expensive grounding rings or gaskets, simplifying installation and reducing potential leak points in non-conductive piping systems.
Q: How does the Bluetooth® verification benefit onsite maintenance?
A: Using the OPTICHECK Flow Mobile app, operators can perform a full device health check from up to 10 meters away. This wireless verification generates a PDF report without interrupting the process, opening the housing, or requiring entry into hazardous or confined spaces.
Before ordering, please confirm these 5 critical parameters:
Is the medium conductive? (Conductivity > 5 μS/cm)
Is the process pressure below 16 barg (230 psig)?
Is the line size between DN10 and DN150?
Is the medium compatible with PFA and Hastelloy C22?
Is there sufficient space for 5D/2D straight runs?
