OPTIMASS 3400 Coriolis Mass Flowmeter

Source: KROHNE, Inc.

The OPTIMASS 3400 is a cost-effective Coriolis mass flowmeter for accurate flow measurement of liquids and gases in a variety of demanding low flow and dosing applications (from 0.3 kg/h or 0.01 lb/min upwards). The OPTIMASS 3400 features Entrained Gas Management (EGMTM) for liquid applications, providing reliable readings even in the event of gas entrainment of up to 100%. In this way, the Coriolis meter enables continuous and uninterrupted measurement of volume flow and mass, density and temperature –  even at very difficult process conditions with 2-phase flow.

The OPTIMASS 3400 features a single Z-tube design which guarantees a low pressure drop across the meter. The device is available with NPT connections, a range of flange connections as well as standard hygienic connections. Like with all other KROHNE Coriolis mass flowmeters there are no installation restrictions as the OPTIMASS 3400 is immune to crosstalk/line vibrations and can thus be installed in series or in parallel. The Coriolis meter is approved for use in hazardous areas. It offers various diagnostic functions (NE 107) and digital communication options.

Product highlights

  • Single Z-tube design
  • Entrained Gas Management (EGMTM): No loss of measurement with gas entrainment up to 100%
  • Fast and completely digital signal processing
  • High accuracy: ±0.1% of MV for liquids / ±0.5% of MV for gases
  • Extensive sensor and process diagnostics (incl. NE 107)
  • Integrated temperature measurement
  • 3 sizes in a single footprint
  • Optional PED approved secondary pressure containment up to 30 barg / 435 psig
  • Many options (heat tracing, purge port etc.)
  • Easily drained and easy to clean
  • Immunity to crosstalk: resistant to installation and process effects
  • On-site verification of flowmeter with OPTICHECK service tool

Typical applications


  • Batching, dosing and filling applications with very low flow rates
  • Measurement of liquids, gases and gas entrained liquids

Oil and gas industry

  • Natural gas and propane odorisation
  • Chemical injection

Chemical and other process industries

  • Concentration and density measurement of low volumes
  • Batching to reactors

Pharmaceutical industry

  • Fragrance dispensing and high precision coatings
  • Dosing of ingredients

Food and beverage industry

  • CO2 injection and dosing

Machinery and apparatus (OEM industry)

  • Engine test beds (e.g. in the automotive industry)

Pulp and paper industry

  • Additives, bleaches and colourants