Measuring devices for leak testing and tools for the roof
With more than 100 years of experience and shaped by the inventive spirit of the RAU family tradition, we offer you high-quality products.
Our test equipment and tools are a commitment to user-friendliness, practicality and quality “Made in Germany”.

Discover our first-class range
Our products are at the side of craftsmen – whether high up on the roof or deep down in the boiler room.
They make work easier and help to create safe living spaces.
Our two main product ranges include
- Measuring devices for leak testing pipes in buildings for plumbers, plant engineers and tradesmen in the HVAC sector
- Sheet metal bending and folding tools for roofs and façades for tinsmiths, plumbers and sheet metal workers










Discover our sophisticated solutions
We only manufacture products that are convincing in practical use.
That’s why they are designed to really help you in everyday life and set us apart from others.
Tools from craftsmen for craftsmen
Our products come from practical experience. That's why they are user-friendly, suitable for the construction site and well thought out down to the last detail.
Everything safely in one case
The measuring device and accessories are always stored safely, clearly and within easy reach. So you have everything you need with you and nothing gets lost.
Durable and robust
Our products are of high quality, reliable and optimized over decades. This makes them a loyal companion for a craftsman's lifetime.
Our most popular products
Tradition meets innovation
Rau GmbH is an owner-managed, medium-sized company, which is tradition-consciously managed in the fourth generation by M. Eng.
Frederik C. Rau.
Based in Meitingen near Augsburg in Bavaria, we are deeply rooted in our region. Originally developed from a tinsmith and plumbing business, our products are the result of decades of practical experience. As a pioneer in the manufacture of sheet metal bending tools and leak testers, we have developed groundbreaking solutions and hold numerous patents for our innovations
Founded in Augsburg in 1914, the RAU family business now operates internationally.
The thought "It has to be easier" inspired many inventions.
All our products are manufactured in Germany and we give preference to regional partners.
We are constantly striving to reduce our CO2 footprint with targeted measures.


What our customers say
„Tools are being invented to make our work easier. By craftsmen for craftsmen.”

„I think it’s good when you work and produce in Germany and have a high quality standard.”

„Great service, great employees. Unfortunately the exception these days.“

„Very good devices and a very simple system. I just wanted to say a quick thank you and give some good feedback.”

Do you like our products?
Become part of our satisfied customer family!
Our products are available exclusively from specialist dealers.
You can also find additional accessories for the measuring devices in our RAU accessories store.
Act now!