LUDWIG KROHNE & SOHN is founded in Duisburg, Germany: Ludwig Krohne starts manufacturing variable area flowmeters to measure the flow of air, gases and liquids
The first electromagnetic flowmeter (EMF) for industrial process measurement is launched
Precision forming of cylindrical glass tubes into high accuracy tapered measuring tubes
First inductive transducers for variable area flowmeters that allow for remote transmission of readings
Production of mechanical level transmitters for measuring liquids in tanks and containers begins
Level indicator with float and magnetic coupling
Introduction of an accurate conversion method for variable area flowmeters, subsequently adopted as VDI Code
Construction of the world's largest calibration rig for volume flow in Sliedrecht, The Netherlands
Development of the pulsed DC field for electromagnetic flowmeters
Development of double-path ultrasonic flowmeters
Construction of a larger and more accurate volume flow calibration rig in Sliedrecht, The Netherlands
First delivery of an ultrasonic flowmeter to Shell for crude oil measurements
First EMF with measuring tube made of oxide ceramics and sintered platinum electrodes
Development and production of Coriolis mass flowmeters starts
Presentation of the first FMCW radar level transmitter for process tanks, pioneering the use of radar level measurement technology in process applications
First straight-tube Coriolis mass flowmeter
First TDR guided radar level transmitter
First electromagnetic flowmeter for partially filled pipes (TIDALFLUX)
First ultrasonic custody transfer meter for liquids (ALTOSONIC V)
Introduction of the first electromagnetic flow meter for beverage filling machines (BATCHFLUX), which since has become the benchmark in this area of application
Installation of the world’s most precise volumetric calibration rig for flowmeters up to DN 3000/120" with a certified accuracy of 0.013 % in Dordrecht, The Netherlands
First 2-wire FMCW radar level meter
First 2-wire electromagnetic flowmeter with full process application compatibility and intelligent power optimization
New generation of Coriolis mass flowmeters with straight measuring tubes (OPTIMASS series)
First 3-beam ultrasonic flowmeter for the chemical industry (UFM 3030)
New generation of OPTIFLUX electromagnetic flowmeters with built-in diagnostics for process, accuracy and meter integrity
New generation of non-contact and guided radar level transmitters with a unique wizard-driven operating concept (OPTIWAVE and OPTIFLEX series)
First presentation of analysis instruments for the water industry
First 2-wire vortex flowmeter with integrated pressure and temperature compensation (OPTISWIRL 4070 C)
First 12-chord ultrasonic gas flowmeter for custody transfer applications with compensating and diagnostic functions (ALTOSONIC V12)
Launch of complete analysis portfolio with digital analytical sensors and systems for wastewater treatment plants (OPTISENS and OPTISYS series)
Launch of turbidity measuring system with unique cuvette calibration and ultrasonic cleaning for easy calibration and low maintenance costs
Introduction of the Drop antenna for OPTIWAVE radar level transmitters: its ellipsoidal shape prevents from product deposits in dusty or humid atmospheres
First EMF with rectangular cross-section to allow for installation without straight inlets and outlets (WATERFLUX)
First temperature transmitter with dual sensor input in 4-wire connection
KROHNE is the first manufacturer to offer a standardised operating and service concept for flowmeters and analytical instruments
Implementation of SmartSense insulation resistance monitoring to detect cracks in the thermowell
Analytical sensor range specially suited for food & beverage processes is introduced
Introduction of OPTIBAR P 3050 C compact pressure transmitter
Unique PP/PTFE Wave Horn antennas for the use of OPTIWAVE radar level transmitters in corrosive environments
KROHNE introduces SMARTPAT: the first digital sensor portfolio with integrated transmitter technology and direct connection to control system via 4…20 mA/HART®
First ultrasonic flowmeter for biogas applications with direct measurement of methane content (OPTISONIC 7300 C Biogas)
Release of OPTIBAR DP 7060 differential pressure transmitter
First OPTISWIRL vortex flowmeter with integrated gross and net heat measurement for hot water (condensate) and steam
Complete OPTIBAR series of pressure transmitters, diaphragm seals, primary elements and accessories is released
Total 3D linearisation for every OPTIBAR DP transmitter established as standard
New 24 and 80 GHz radar level transmitters added to OPTIWAVE series, each designed for specific industry needs
New OPTIFLEX series of TDR guided radar level transmitters designed for specific industry needs
NFC and Bluetooth® communication for temperature transmitters
New solutions for safe and efficient pipeline management (PipePatrol) are launched
KROHNE and SAMSON introduce Joint Venture FOCUS-ON for the development, production and marketing of autonomous actuators for the process industry 4.0
myDevice Suite of Smart Service Tools for the entire lifecycle of a measuring point is launched
OPTIBAR PM 3050 compact pressure transmitter for pressure and level applications is launched
KROHNE introduces Bluetooth® Low Energy (BLE) option for all OPTIMASS x400 Coriolis flowmeters
Introduction of AF-E 400 small and compact EMF for utilities and industrial automation
OPTIMASS becomes the first series of Coriolis mass flowmeters on the market allowing secure wireless access via Bluetooth® or remotely via HART® even in safety-related applications
KROHNE celebrates their 100th anniversary under the sign of creativity: "100 years of KROHNE. 100 years in the Spirit of Creativity."