The KROHNE OPTIFLUX 4300 electromagnetic flowmeter is designed for high-accuracy liquid measurement in aggressive chemicals, high-solid slurries, and high-pressure process loops.
±0.2% High Volumetric Accuracy: Certified for legal custody transfer (OIML R49 / R117, MI-001/004/005).
Virtual Reference Grounding: Eliminates costly grounding rings and potential flange leak points.
Extreme Process Limits: Operates up to 180°C (356°F), 1500 bar, and handles 70% solid particle slurries.
In Stock & Fast Logistics: 100% original factory supply with 3.1 MTC certificates. Request a quote today for 2-hour rapid pricing & sizing support!
The KROHNE OPTIFLUX 4300 electromagnetic flowmeter (EMF) is engineered for chemical process managers, mining engineers, and EPC procurement specialists who cannot afford zero-point drift, liner collapse, or frequent maintenance shutdowns when measuring aggressive chemicals, abrasive slurries, or high-value custody transfer fluids. If you are comparing technologies across different measuring principles, feel free to review our full range of Coriolis Mass Flow Meters and high-accuracy industrial instrumentation options.
| Performance Metric | Standard Factory Specification | Extended / Custody Transfer Limits | Plant Process & ROI Impact |
| Nominal Diameter Range | DN2.5 to DN3000 (1/10″ to 120″) | Custom bore sizes & liner thicknesses on request | Fits direct line replacements from small dosing loops up to DN3000 bulk headers |
| Volumetric Measurement Accuracy | ±0.2% or ±1 mm/s of measured value (MV) | OIML R49 / R117, MI-001, MI-004, MI-005 Certified | Prevents unmetered volumetric losses during commercial custody transfer |
| Fluid Conductivity Threshold | ≥ 1 µS/cm (≥ 20 µS/cm for water) | Low-conductivity signal converter module | Guarantees signal lock in demineralized water and high-purity solvent loops |
| Operating Temperature Range | -40°C to +180°C (-40°F to +356°F) | PFA/PTFE linings for thermal shock protection | Withstands sudden steam purging and aggressive thermal CIP/SIP cycles |
| Process Working Pressure | Max 40 barg / 580 psig (Standard Flange) | Up to 1500 bar / 21751 psi (Special Flange Designs) | Prevents body deformation during high-pressure offshore subsea injection |
| Solid Slurry Concentration Limit | Up to 70% solid particle density | Hard rubber / Polyurethane (PUR) abrasion liner | Eliminates internal erosion when pumping mining tailings, sand, or pulp media |
| Dynamic Turndown Ratio | 1000:1 bi-directional measurement | Low-flow cut-off fully configurable | Captures trace leaks and high-volume surge flows without swapping meters |
| Grounding Method Requirement | Virtual Reference Grounding (0 DN extra) | Eliminates external alloy grounding rings | Eliminates gasket leak points and cuts exotic alloy ring costs by 100% |
| Selection Vector | KROHNE OPTIFLUX 4300 (EMF) | Industrial Vortex Flowmeter | Clamp-On Ultrasonic Meter |
| Operating Physical Principle | Faraday’s Law of Electromagnetic Induction | von Kármán Vortex Shedding Frequency | Ultrasonic Transit-Time Signal Phase |
| Compatible Fluid Types | Acids, alkalis, slurries, conductive liquids | Clean liquids, saturated steam, dry gases | Clean fluids, low-particle liquids |
| 70% Solid Slurry Handling | Immune (Smooth full-bore non-intrusive design) | Fails (Particles clog and damage bluff body) | Fails (High signal scattering and attenuation) |
| Invasive Straight Pipe Need | 5 DN Upstream / 2 DN Downstream | 10–20 DN Upstream required | 10–15 DN Upstream required |
| Permanent Pressure Loss | 0 bar (No moving parts, full bore) | High pressure drop over bluff body | 0 bar (Non-intrusive) |
| Legal Custody Transfer Approvals | OIML R49/R117, MI-001, MI-004, MI-005 | Extremely rare custody approval | Very limited custody recognition |
If you have ever processed concentrated sulfuric acid, hydrofluoric mixtures, or aggressive brine, you know that traditional flowmeters require exotic alloy grounding rings (like Tantalum, Titanium, or Hastelloy) to establish a signal ground. Over time, these metallic rings corrode, causing sudden flange leaks and thousands of dollars in unscheduled downtime.
The OPTIFLUX 4300 solves this completely through its Virtual Reference Grounding system. The converter’s input circuit creates an electronic virtual zero potential directly through the fluid column. You get an accurate, unshakeable measurement without installing a single grounding ring, instantly cutting material purchasing costs and removing leak paths across your pipe flanges.
Pumping abrasive media—such as copper ore slurry, sand, or mineral tailings—acts like sandpaper inside standard flowmeters. Once the inner liner shreds, liquid penetrates the coils, frying the electronics and halting your production line.
By pairing thick Polyurethane (PUR) or Hard Rubber linings with wear-resistant Hastelloy C-22 or Tantalum electrodes, the OPTIFLUX 4300 cushions mechanical impacts from solid particles up to 70% concentration. This extends the operational lifespan of the meter by 3x to 5x in severe mining, dredging, and paper pulp applications. For high-temperature or mass balance applications requiring density integration, see our engineered Micro Motion CMF200M Coriolis Mass Meter options.
Pulling a heavy flowmeter off a live main header to send it out for annual calibration verification can cost your plant tens of thousands of dollars in lost yield and labor.
Equipped with NAMUR NE 107 self-diagnostics and full integration with the OPTICHECK service tool, the OPTIFLUX 4300 performs total magnetic and electronic health checks in-line—while the process is running. You get a downloadable, audit-ready calibration report in minutes without unbolting a single flange or stopping plant production.
Q: How does Virtual Reference Grounding lower total installation costs on large DN1000+ pipelines?
Virtual Reference Grounding eliminates the physical grounding rings or grounding electrodes usually needed to establish a stable signal reference. On large-diameter pipelines (DN1000 to DN3000 / 40″ to 120″), purchasing custom Titanium or Tantalum grounding rings can add thousands of dollars per installation. By removing these rings, you eliminate high material costs, reduce flange weight, and remove potential gasket leak points during high-pressure operation.
Q: Which liner material should I select for aggressive chemical processing and CIP cleaning?
For aggressive acids, strong bases, or high-temperature chemical lines up to +180°C (+356°F), specify a PFA (Perfluoroalkoxy) or PTFE (Polytetrafluoroethylene) lining. PFA is chemically inert and offers outstanding resistance to vacuum stress and thermal shock, preventing the liner from blistering or pulling away from the steel housing during sudden pressure drops or high-heat Clean-in-Place (CIP) cycles. For heavy abrasion at lower temperatures, choose Polyurethane (PUR) or Hard Rubber.
Q: Is the OPTIFLUX 4300 certified for hazardous areas and subsoil underground installation?
Yes. The OPTIFLUX 4300 comes with global explosion-proof approvals including ATEX, IECEx, NEPSI, FM, CSA, cQPSus, EAC Ex, INMETRO, and KCs. For flooded valve pits or underground subsoil installations, you can select the IP68 / NEMA 6P enclosure rating with specialized ISO 12944 anti-corrosion protective coatings, enabling continuous underwater or buried operation without signal loss.
Custody Transfer (CT) Approvals: OIML R49, OIML R117, MI-001 (Water), MI-004 (District Heating), MI-005 (Non-Water Liquids).
Explosion-Proof / Hazardous Certifications: ATEX, IECEx, NEPSI, FM, CSA, cQPSus, EAC Ex, INMETRO, KCs, PESO, IA.
Hygienic & Marine Approvals: FDA Compliant Liners; Marine Type Approvals from ABS, BV, CCS, DNV, KR, LR, NK, RINA, CRS, IRS, PRS, RS.
Digital Communication Interfaces: 4…20 mA HART®, FOUNDATION™ Fieldbus, Profibus-PA, Profibus-DP, Modbus RTU, PROFINET.
Engineering Sizing & Pipe Cross-Reference: Contact our technical engineers for fluid velocity calculations, sizing checks, and chemical-liner compatibility reviews.
Complete Quality Certification Pack: Every OPTIFLUX 4300 is supplied with factory calibration sheets, dynamic hydro-test certificates, and EN 10204 3.1 Material Test Certificates (MTC).
Direct Price Quote & Global Shipping: Submit your process parameters via our Technical Sales Contact Form today to receive a formal quotation, technical datasheet, and guaranteed delivery schedule within 24 hours.
