Electromagnetic flowmeter for advanced process and custody transfer (CT) applications

  • High accuracy (±0.2%), certified for custody transfer
  • For low conductivity media (>1 μS/cm) and high solid contents (≤70%)
  • Flange: DN2.5…3000 / ⅒…120", max. PN40 / ASME Cl 300
  • 3 x 4…20 mA, HART®,Modbus, FF, Profibus-PA/DP, PROFINET

OPTIFLUX 4300 C – Compact version

OPTIFLUX 4300 C Electromagnetic flowmeter – Compact version

The OPTIFLUX 4300 is an electromagnetic flowmeter (EMF) for advanced process applications with aggressive liquids or abrasive media. The high-end flowmeter is particularly suitable for critical applications requiring high accuracy and many diagnostic functions. It enables reliable measurement even under very harsh process conditions with temperatures up to +180°C / +356°F, low conductivities (≥1 µS/cm), high solid contents (up to 70%) and high pressures (up to 1500 bar / 21751 psi). For custody transfer applications, the OPTIFLUX 4300 has a wide range of certifications including OIML R49 and R117 or MI-001 and MI-005. It can also be used for flow measurement in district heating networks requiring MI-004 approval.

The OPTIFLUX 4300 is available in a wide diameter range up to DN3000 / 120". Its patented virtual reference option allows for a very cost-saving measuring mode without additional grounding rings – particularly when it comes to large diameters. Installation in measurement chambers subject to (constant) flooding is possible with the IP68 / NEMA 6P rated version. The meter is approved for use in hazardous areas and offers various digital communication options. A full on-site verification of the OPTIFLUX 4300 without process interruption can be carried out using the OPTICHECK service tool.

Product highlights

  • Bi-directional flow measurement over a wide dynamic range (turn down ratio: 1000:1)
  • Available with patented virtual reference grounding method: no grounding rings needed
  • Extensive flowmeter and process diagnostics (incl. NE 107)
  • For hazardous areas: ATEX, IECEx, NEPSI, FM, CSA, EAC, INMETRO
  • Standard measurement accuracy: ±0.2% or ±1mm/s of measured value (MV)
  • For custody transfer: OIML R49, OIML R-117; MI-001, MI-004, MI-005
  • PTFE, PFA, ETFE, hard rubber, soft rubber or PU liner: excellent chemical and abrasion resistance
  • Wide range of electrode materials
  • Special designs, sizes, inner diameters and liner thicknesses on request
  • Optional external coatings for offshore or subsoil installation (also acc. to ISO 12944)
  • Full bore design: No moving parts, no wear, no pressure loss
  • On-site verification of flowmeter with OPTICHECK service tool

Typical applications


  • Advanced applications with clean, aggressive or abrasive liquids
  • For low conductive media (>1 μS/cm)
  • Fiscal metering (custody transfer) of liquids other than water
  • Custody transfer flow measurement in district heating networks
  • Applications with high pressures (max. 1500 bar)

Chemical and other process industries

  • Dosing of additives
  • Custody transfer of chemicals
  • Conductive fluid chemicals
  • Process water, cooling water

Oil and gas industry

  • Water injection (high pressure)
  • Drilling mud
  • Produced water

Minerals and mining industry

  • Hydrocyclone feed lines
  • Sludge and slurries

Pulp and paper industry

  • Paper pulp
  • Chemicals (black liquor, bleach, etc.)

Wastewater industry

  • Sludge and sewage treatment

Accessories for this product


Handheld for in-depth verification, device commissioning and monitoring

  • On-site performance check and verification (level 0,1,2) without process interruption
  • Convenient commissioning of field devices, e.g. zero calibration
  • Detailed reports for proof test documentation of safety loops acc. to IEC 61508/61511, and for quality management systems (ISO 9001)

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DTM for advanced device verification and commissioning

  • Usable with any FDT frame application from the control room or on site
  • Advanced verification (level 0,1) without process interruption
  • Detailed reports for proof test documentation of safety loops acc. to IEC 61508/61511, and for quality management systems (ISO 9001)

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Related products

IFC 300

Electromagnetic flow converter for combination with OPTIFLUX and WATERFLUX flow sensors

  • Compact, remote field, wall-mounted and rack-mounted housing
  • With extensive diagnostics for advanced requirements (NE 107)
  • 4-wire, 3 x 4…20 mA, HART®, Modbus, FF, Profibus-PA/DP, PROFINET etc.

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Electromagnetic flow sensor for combination with IFC 050, IFC 100, IFC 300 and IFC 400 signal converters

  • Full bore design: pipe cross-section without restrictions
  • Connection sizes: DN2.5…3000 / ⅒…120" (depending on signal converter)
  • Liner: PTFE, PFA, ETFE, PU, hard and soft rubber

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