World-class with roots in the Black Forest

World market
leader in


Testo, with its headquarters in Lenzkirch in the Black Forest, is a world market leader in the field of portable and stationary measurement solutions. In 30 subsidiary companies around the world, 2,500 employees research, develop, produce and market for the high-tech company. The measurement technology expert convinces over 650,000 worldwide customers with highly precise measuring instruments and innovative solutions for the measurement data management of tomorrow.

An average annual growth of over 10 % since founding in 1957, and a current turnover of just short of a quarter of a billion Euros impressively demonstrate that the Upper Black Forest and high-tech systems go perfectly together. The above-average investments in the future of the company are a part of Testo's recipe for success.

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2014 Testo launches the Cloud-based monitoring system testo Saveris 2.

Recognised as one of the top 100 German medium-sized companies by the business news magazine Wirtschaftswoche and the Munich Strategy Group.

Testo launches the first fine particle measuring instrument onto the market. Testo Romania founded.

Turnover exceeds €200 million for the first time. Testo Sensor GmbH is founded. The site in Titisee is opened. 2300 employees worldwide.

Thermal image building thermography

Testo is one of the 100 most innovative medium-sized companies in Germany.

The Testo thermal imager conquers the market. Over 1600 employees worldwide.

50 years of Testo. 50 innovations in the anniversary year. Additional subsidiaries in Russian and India.

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The testo 330 ushers in a new era of flue gas measurement technology.

Over 1000 employees worldwide. Turnover exceeds €100 million for the first time.

Testo Argentina and Testo Shanghai are established.

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Additional subsidiaries in Austria, England, the USA, the Netherlands, Belgium, Japan, Poland, Hungary, the Czech Republic, Brazil, Korea and Turkey. Testo Asia is founded, as is testo industrial services in Lenzkirch.

The testostor 171 & 175 logger family begins its ascendancy on the market.

New companies are founded in Hong Kong and Switzerland. Subsidiaries now operating in Italy, Spain and Australia. 500 employees worldwide.

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The testo 452, a multifunctional measuring instrument with printer, is a world first.

Testo France is founded as the first subsidiary.

One of the first digital fast-response thermometers in the world with accuracy in seconds is launched.

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Growth of 40% makes first building extension necessary in Lenzkirch.

Testoterm is founded. The first product is an electronic clinical thermometer.