1939 – The first step

75 years ago in 1939 the first steps in the history of INOR took place. Alfred Brakl emigrated from Austria to Sweden and founded INOR AB. Since the very first days the company has been focused on temperature measurement. Initially the company was a sales company distributing temperature assemblies and components.

Sitting, from left to right: Alfred Brakl (founder of INOR), Irene Brakl (his wife), Felix Brakl (younger son), Peter Brakl (older son). Standing, in the background: Some of INOR’s employees
The family Brakl and some of INOR’s employees

1974 – World’s first head-mounted temperature transmitter

The TRA-R1 from INOR was the world’s first head-mounted temperature transmitter

INOR expanded over time and started assembly of instruments and service. In the sixties INOR decided to develop their own temperature transmitter. This development led to a major breakthrough in 1974 when INOR invented and developed the world’s first head-mounted transmitter. The head-mounted temperature transmitter has since then turned into an international standard. The heritage of this has continued with more own-developed high quality transmitters and INOR is today a well renowned brand name all over the world.

One of INOR’s first self-produced measurement instruments, an optical pyrometer for temperature measurement in melting furnaces.
Early INOR advertisement

Product portfolio increases

INOR has been manufacturing temperature assemblies and transmitters since the 1950’s and over the years has acquired an extensive competence in the field of industrial temperature measurement. The product portfolio has increased to include both standard assemblies and unique, special designed instruments in different materials and shapes.

Top/Bottom left: Leif Olsson (1974) who still works at INOR, currently for Internal Sales. | Center: Picture of INOR production from the 1980’s | Top right: A group of INOR employees from the 1970’s. | Bottom right: Thomas Zwietz (1991) who still work
INOR employees 1970–1990

1995 – ISO 9000 certification

Parameterisation of an OPTITEMP TT 51 temperature transmitter
Transmitter parameterisation

In 1995 INOR became certified according to ISO 9000, which was an important step to further establish INOR as a leading high-quality company.

Learn more about the temperature measuring principle

KROHNE Academy online gives you direct access to the knowledge and vast experience of KROHNE. The platform offers free of charge and commercial-free online courses about measurement principles (incl. e.g. the temperature measuring principle), sizing, advantages and limits of operation, applications and industries.

Temperature eLearning KROHNE Academy online

2006 – Part of the KROHNE family

Felix Brakl (middle), Managing Director of INOR with Michael Dubbick (left) and Stephan Neuburger (right), Managing Directors of KROHNE in 2006.
KROHNE acquires INOR

In 2006 INOR was acquired by the KROHNE Group. The product portfolio and temperature measurement competence was exactly what KROHNE was looking for to further expand their portfolio of high-quality process instruments. The development of INOR has since then been focused on further expansion of the product portfolio and globalising the offer. An example of this is the delivery to the Solana solar plant in Arizona, USA where more than 1,100 measuring points and several unique special sensors and multi points were supplied by INOR. The order included 1,148 OPTITEMP TT 51 transmitters, a HART® transmitter with SIL2 approvals.

Learn more about the OPTITEMP TT 51 temperature transmitter

The OPTITEMP TT 51 Microsite gives you all the details about the dual-input programmable HART® temperature transmitter series with sensor drift recognition incl. all technical details.

OPTITEMP TT 51 Microsite

Whether it’s reliable temperature measurement in steam pipelines at power plants or the exact determination of process temperatures in chemical plants, KROHNE temperature assemblies are as versatile as the requirements and specific applications of our customers need them to be. Some of these applications have been summarised to application reports and notes.

Explore the OPTITEMP product family

The OPTITEMP WebApp gives you a brief overview about KROHNE’s complete temperature product portfolio. Check each products highlights, technical data and range of application.

OPTITEMP product family WebApp

2011 – More space and larger capacity

In 2011 the company moved to new facilities allowing for improved process control, more space and larger capacity. At the same time the company changed its name to KROHNE INOR combining the strong brand names of both companies.

In 2011 the company moved to new facilities allowing for improved process control, more space and larger capacity.
New premises since 2011

2014 – 75 years of experience

Today KROHNE INOR products are represented in more than 100 countries worldwide, offering a comprehensive product portfolio throughout the entire range of industrial temperature measurement instruments.