Maximum durability for critical processes

picture of a refinery with pipes
The sensor OPTISONIC 3000 features a robust, fully welded construction with patented inert metal transducer technology. With the full bore unobstructed sensor tube without moving parts, the flowmeter measures bi-directionally, starting at nearly zero flow
OPTISONIC 3000 sensor

The sensor OPTISONIC 3000 features a robust, fully welded construction with patented inert metal transducer technology.

The mechanical construction of tubes, process connections and transducers are standardised for all versions, including meters for demanding applications such as high viscosity, extended process temperatures and cryogenic process temperatures.

The sensor is backward compatible with earlier models.

With the full bore unobstructed sensor tube without moving parts, the flowmeter measures bi-directionally, starting at nearly zero flow, and does not cause any pressure loss. This makes the OPTISONIC 3400 uniquely suitable for critical processes.

Accurate flow measurement with continuous performance

Thanks to the new signal converter UFC 400, the OPTISONIC 3400 features improved accuracy, easier installation handling, dynamic path substitution, Reynolds correction and tube expansion correction.
Three acoustic paths

Thanks to the new signal converter UFC 400, the OPTISONIC 3400 features improved accuracy, easier installation handling, dynamic path substitution, Reynolds correction and tube expansion correction. At almost zero flow, accurate flow measurement is still guaranteed.

The single signal converter concept with universal software applies to all sizes and versions of the OPTISONIC 3400 and supports all general purpose and more demanding applications with exceptional accuracy.

The signal converter of OPTISONIC 3400 is a truly advanced solution with multiple I/O choices, and communication protocols, including HART® 7, FOUNDATIONTM fieldbus, Modbus, and PROFIBUS® PA. All communication protocols include diagnostics compliant with the NAMUR NE 107 guideline. This is an operator-friendly signal converter which quickly and accurately alerts process operators to less than ideal process conditions. Being able to react in a timely fashion, based on good information, ensures that consistent process and product integrity can be maintained.

Of course, the KROHNE OPTISONIC 3400 has been approved for operation in hazardous environments worldwide: ATEX, IECEx, cCSAus, NEPSI and other local certifications.

All communication protocols include diagnostics compliant with the NAMUR NE107 guideline. This is an operator-friendly signal converter which quickly and accurately alerts process operators to less than ideal process conditions.
NAMUR NE 107 guideline compliant diagnostics

Process liquid measurement the smart way

The OPTISONIC 3400 is great for process liquid measurements of conductive and non-conductive, low and high viscous liquids, from -200 °C to +250 °C / -328...+482 °F medium temperature. The liquids can be applied without too much consideration of chemical inertness, turndown ratio, accuracy span, maintenance or other risks related to wear or necessary replacements.

Unlike traditional mechanical flowmeters, the OPTISONIC 3400 ultrasonic flowmeter can measure multiple products without jeopardising accuracy or need to recalibrate.

Unlike traditional mechanical flowmeters, the OPTISONIC 3400 ultrasonic flowmeter can measure multiple products without jeopardising accuracy or need to recalibrate.
Identification of the product through velocity of sound

The liquids should be single-phase and relatively clean. Because of the differential transit time principle, pollution levels in the liquid should not exceed a few percent of gas bubbles and/or solid particles.

Bi-directional by nature

With known and stable liquid density, in addition to volumetric flow, mass measurement is also possible. Bi-directional flow measure­ment is a standard feature of the OPTISONIC 3400 which can also be used as a smart safety feature, e.g. triggering an alarm in case of a reverse flow.

This makes the OPTISONIC 3400 a truly unique multi-purpose, all-round ultrasonic flowmeter.

Trouble free installation

The installation requirements for the entire range of OPTISONIC 3400 flowmeters were specifically optimised for ease of use and time saving efficiency. Designed for easy handling, the flow sensor is lightweight, with compact dimensions.

Learn more about the installation advantages

  • No need for auxiliary parts like grounding rings, earth cables, flow straighteners or supports to bear the weight
  • Minimum required inlet/outlet sections of 5DN/3DN for optimum performance
  • Mounting the flow sensor in buried pipelines is also no problem using the submersible product variant (IP68/NEMA 6P)
HART 7, FOUNDATION fieldbus, Modbus, PROFIBUS PA

Superior ease of use

Commissioning the new UFC 400 signal converter is consistent with the easy installation approach of the OPTISONIC 3400. The flowmeter is factory programmed according to customer requirements. The electrical connections of the signal converter are straightforward and all I/O connections (basic I/O, Ex i I/O, modular I/O) are similar to all other KROHNE GDC devices. One new enhancement is the user display which is equipped with both optical and push buttons.

For the choice of fieldbuses, the accompanying DTMs, DDs and drivers are available free of charge via the KROHNE website.

The connections of the UFC 400 signal converter are similar to all other KROHNE GDC devices.
The connections of the UFC 400 signal converter are similar to all other KROHNE GDC devices.

Comes in all sizes, for all applications

The diameter range available is broad, from DN25 / 1 inch for dosing purposes, up to DN3000 / 120 inch for water transportation pipelines.

KROHNE also gives you a lot of flexibility in the choice of materials, offering carbon steel, stainless steel, low temperature carbon steel, duplex and more.

Flow sensor variants are compact and remote. In addition to flanged flow sensors, flangeless flow sensors for on-site welding onto the pipeline can be provided.

Available flow sensor options for demanding applications:

  • Extended process temperature up to +250 °C / +482 °F
  • Cryogenic as low as -200 °C / -328 °F
  • High viscous liquids ranging from 100…1000 cSt
Ultrasonic flowmeter with small diameter, compact version and standard finish

OPTISONIC 3400 C

Small diameter,
compact version,
standard finish

Ultrasonic flowmeter with large diameter, compact version and standard finish

OPTISONIC 3400 C

Large diameter,
compact version,
standard finish

Ultrasonic flowmeter with small diameter, field version and stainless steel

OPTISONIC 3400 F

Small diameter,
field version,
stainless steel

Ultrasonic flow signal converter compact version

UFC 400 C

Compact version mounted directly on the measuring sensor

Ultrasonic flow signal converter field version

UFC 400 F

The electrical connection to the measuring sensor via a signal cable (max. 30 m; 90 ft)