As a private enterprise that has been owned by our family for more than 60 years, we feel particularly committed to our customers’ interests. One of our major goal is to live up to the reputation and tradition of the quality label “made in Germany”. In the north Bavarian town of Hersbruck we manufacture high-quality measurement tools for the most diversified applications. These products meet the highest demands of trade and industry. On top of that, BMI succeeds in combining tradition and innovation. This is also highlighted by our way into laser levelling. Since 1993, BMI has been one of the leading manufacturers in this technology. A further indication of the continuous innovation is a huge number of active patents. Some of our patented milestones in the development and production of practical measuring instruments are listed below.

Professional quality - one-stop shopping. All our efforts aim to equip you with up-to-date, marketable quality measuring instruments so that you can approach your customers in a competent and successful way.

Hans Keller
CEO and Sole Proprietor

New product development


The introduction of unique spirit levels whose vials have been unalterably fixed by means of ultrasonic welding

The minimization of a tape breakage hazard through the FLEXTOP tip for measuring tapes

Measuring tape frames with ball bearings of the Ergoline series for left and right handers

High-tech manufacture of EUROSTAR - with unbreakable, laser-marked vials.

The levelling laser BMI-Magic and its universal usage

Introduction of the enclosed series, Radius for measuring tapes

Presenting the robust, waterproof construction laser
Nautilus IPX7

topoMAT – sold more than 10.000 times since 1999 – becomes rainproof according to the IP55 standard

Quicky is both folding rule and ruler.

Polywood, the first non-sparking spirit level, fully insulated up to 1000V according to EN60900:2004.

BMImeter with a tape stopper and belt clip


  • BMImeter
  • Highprecision
  • Winkelstar
  • Nautilus IPX7
  • TopoMat
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BMI Messzeuge

  • Bayerische Maßindustrie
  • A. Keller GmbH
  • Rosengasse 12
  • DE-91217 Hersbruck, Germany
  • Phone (national): 09151 7301-0
  • Phone (intl): +49 9151 7301-49
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