Ultrasonic Flow meter ALTOSONIC V12

The ALTOSONIC V12 is a 12-chord ultrasonic custody transfer (CT) flowmeter for natural gas. It has been designed to offer the best possible measurement accuracy, not only during calibration under ideal conditions but also during less ideal conditions in the field. As a result, ALTOSONIC V12 is the first ultrasonic flowmeter that was certified to OIML R137 class 0.5 by NMi.


Due to its design with 12 acoustic chords a flow conditioner is no longer required; standards such as AGA9, ISO 17089 and MID are met with just 5D straight inlet piping. CBM flowmeter diagnostics are standard and give an exact picture of what is happening inside the flowmeter. With the optional KROHNE Care diagnostic expert system an integrated web server becomes available that presents the results as an easy to access webpage – in plain language.

Complete product family for widest application range

12 acoustic chords for excellent swirl immunity and built-in redundancy

Dedicated diagnostic path for deposits, dirt or changes in surface roughness

No flow conditioner required

Just 5D straight inlet piping required to comply to AGA9, ISO 17089 and MID

First ever ultrasonic flowmeter to receive OIML R137 class 0.5 approval by NMi

Free of charge condition-based monitoring (CBM)

Optional with KROHNE Care system for 24/7 evaluation of meter health and accuracy





Custody transfer and allocation metering of natural gas

Pipeline leak detection applications

Master metering

Check metering


Oil and gas industry


On- and offshore oil and gas production

Pipeline metering station

Large consumers of natural gas

LNG production and regasification

Underground gas storages (UGS)

Border stations

Natural gas distribution



Measuring tube  

Austenitic stainless steel

(1.4404/316L), Carbon steel (A106

Gr.B), Carbon steel (A333 Gr. 6),

Carbon steel (A350 Gr. LF2), Duplex

stainless steel (1.4462/318)



Process Connection


Flange connections  EN (1092-1): DN100…1600


ASME (B 16.5): 4…64″


Pressure rating

(EN 1092-1)




Pressure rating

(ASME B 16.5)


CL 2500#