Horstmann is an established medium-sized company with its headquarters in Heiligenhaus, not far from Düsseldorf. Founded in 1946 by Heinrich Horstmann, the company is still successfully run by the family today. Thanks to our many years of experience and consistent willingness to innovate and invest, Horstmann has established itself as a leading manufacturer of medium-voltage technology.

Our product portfolio includes:

·       Short-circuit indicators: Precise devices for detecting short circuits in electrical systems.

·       Earth fault indicator: Efficient solutions for identifying earth faults.

·       Voltage detectors and detecting systems: High-quality instruments for checking electrical voltages.

·       Earthing devices and accessories: Robust and reliable products for safe earthing systems.

We attach great importance to quality and reliability, which is underlined by our DIN EN ISO 9001 and ISO 27001 certifications. Our commitment to technical excellence and continuous improvement is reflected in every single product and meets the high demands of our customers in the electrical engineering sector. Trust in the innovative strength and stability of Horstmann – your partner for future-oriented products and solutions in medium-voltage technology.