1921 |
LUDWIG KROHNE & SOHN founded.
Production of variable-area
flowmeters. |
1952 |
First electromagnetic flowmeter for
industrial
applications (TOBI 1952 / KROHNE Altometer 1962) |
1953 |
Precision forming of cylindrical glass
tubes
into high accuracy tapered measuring tubes |
1954 |
First inductive transducers for
variable area
flowmeters in Germany |
1959 |
Level indicator with float and magnetic
coupling |
1960 |
Introduction of an accurate conversion
method
for variable area flowmeters, subsequently adopted as VDI Code |
1961 |
First electromagnetic flowmeter as a
product
of the KROHNE Group (ALTOMETER) |
1966 |
Construction of the world's largest
calibration
rig in Sliedrecht/Netherlands |
1972 |
Development of the pulsed DC field for
electromagnetic
flowmeters |
1978 |
Development of double-beam ultrasonic
flowmeters |
1979 |
Construction of a still bigger and more
accurat
calibration rig in Sliedrecht/NL |
1980 |
First delivery of an ultrasonic
flowmeter to
Shell for crude oil measurements |
1985 |
Development and production of the
Coriolis mass
flowmeter |
1990 |
First microwave radar (FMCW) level
gauge for
level measurement |
1994 |
First straight-tube Coriolis mass
flowmeter |
1996 |
First electromagnetic flowmeter for
partially
filled pipes (TIDALFLUX). |
1996 |
ALTOSONIC V is the first
ultrasonic liquid
custody transfer meter in the world. |
2000 |
Commissioning of an eleventh
calibration rig,
the largest and most accurate in the world, at KROHNE Altometer,
43 metres
high calibration tower, calibration volume uncertainty < 0.013% |
2001 |
First electromagnetic 2-wire flowmeter
with full
process application compatibility, intelligent power optimization,
high
dynamic |
2002 |
The new generation of massflow meters
with straight
tube, OPTIMASS. |
2003 |
First 3-beam ultrasonic flowmeter for
the chemical
industry, UFM 3030. |
2004 |
New Generation lectromagnetic
flowmeters OPTIFLUX
with built-in diagnostics for process, accuracy and meter
integrity. |
2004 |
The new generation Level Radar OPTIWAVE
and guided Radar OPTIFLEX with unique wizard-driven
operating concept |
2006 |
Most efficient clamp-on ultrasonic
flowmeter OPTISONIC 6300 |
2007 |
OPTISWIRL 4070 C first vortex
flowmeter with integrated pressure and temperature compensation
in 2-wire technology |
2009 |
ALTOSONIC V12 combines, for the
first time in an ultrasonic flowmeter, the advantages of the parallel
chord concept and the reflection technique, setting a new standard in
ultrasonic custody transfer gas metering. |