Who We Are

Experience since 1973 – we are experts in custom control units and printed electronics. With well-engineered IoT solutions, we create devices for industrial applications that are fit for the digital future. As a medium-sized family-owned company, we offer both HMI solutions and M2M communication.

We develop innovative and modern devices for and in cooperation with our customers. As a contract manufacturer, we are at your side with customer-oriented project management throughout the entire development process and at your disposal with expert knowledge from the mechanical and electrical design to production. The diversity of industries consistently presents new challenges and drives our innovation ensuring durable and reliable devices even under the most adverse operating conditions.

As pioneers of the membrane keypad in Germany and a second-generation family-owned business, we have matured into one of the market leaders for complex operating devices and control units.

  • We find the perfect solution for your application
  • We manufacture in Germany
  • We develop high quality solutions (DIN EN ISO 9001)
  • We care for the environment (DIN EN ISO 14001)
  • We manufacture according to the highest standards (DIN EN ISO 13485)


The HK Technology Network

Together we can do more! As part of the HK technology network, six companies bundle their core competencies and provide know-how and individual solutions for complex operating units and user interfaces, electronics, sensors and housing solutions combined with future-oriented, cloud-based IoT solutions. Thanks to close cross-company cooperation, in times of Industry 4.0 and digitization we provide customer-specific solutions, all from a single source.


Input Devices
+ Sensor Technology

Hoffmann + Krippner GmbH manufactures custom input systems, printed electronics and industrial electronic components for machines and equipment in a wide variety of industries – including design, construction and development.


Input Devices
+ Metal Housing

TES Frontdesign GmbH is a specialist in the complete production of custom input devices – from membrane switches and control panels to complete HMI’s with housing, including the assembly of electronic components.



HK.SYSTEMS is your partner for digital business models and your fast, effective ticket to digitalization. From suitable devices and the IoT engine to the operation of your networked solution.


Electronics Development
+ Connectivity

HELICOM GmbH delivers products, solutions and development services in hardware, firmware and middleware: electronics, data transmission, electronics development, server technology.


IoT Cloud Platform
API + APP Development

ROBIOTIC implements a variety of critical components: software development, API interfaces as well as APP development. ROBIOTIC also takes care of the platform operation and is a specialist for Data Security and Data Privacy.


Digital Interaction
User + Device

Connect One® provides Internet for Things. The unique combination of sensors, software and services allows to detect and register your products already in the manufacturing process.


Environment and Resources

Our production processes are always optimized with regard to the least possible use of resources. We strive to continuously reduce the environmental pollution caused by emissions, waste, sewage, and noise.

When developing and introducing new manufacturing processes, we take the associated environmental impact into account at an early stage. We prefer to use materials and supplies that are less harmful to the environment.

In addition to compliance with the relevant environmental legislation, we are committed to continuous improvement in environmental protection and energy-related performance as well as avoidance of environmental pollution.

Hoffmann + Krippner regularly monitors and evaluates the environmental impact. From this we derive goals and measures, the implementation of which we consistently pursue.

View our ISO 14001 Environmental Management certificate.

  • 1973


    Max Hoffmann + Fritz Krippner found a company in Eberstadt for technical screen printing and painting for industrial applications

  • 1977


    Relocation to Buchen with in-house production and sales offices

  • 1978

    The First Membrane Keypad

    Initial printing on foil and development of the first membrane keypad.

  • 1987


    Expansion of the production facility.

  • 1994


    Quality management certification according to DIN EN ISO 9001-2000.

  • 1997

    Everything Under One Roof

    Extensions of the administration and design building. Research and development, design, printing, stamping, electronics assembly, assembly, quality control, electrical and visual testing and sales are now under one roof.

  • 2004

    New Management

    Ralf Krippner becomes CEO in the second generation.

  • 2007

    The USA

    Founding of Hoffmann + Krippner, Inc. Atlanta/USA.

  • 2008

    DIN EN 14001

    Environmental management certification according to DIN EN ISO 14001.

  • 2010

    New Building and Certification

    Expansion of production site in Buchen (new building), certification according to DIN EN 13485, and opening of Hoffmann + Krippner sales office in Cambridge.

  • 2016

    Majority Stake in TES Frontdesign

    Effective January 1, 2016, Hoffmann + Krippner GmbH owns majority stake in TES Frontdesign.

  • 2018

    Founding of ROBIOTIC GmbH and Majority Stake in Helicom GmbH

    ROBIOTIC GmbH is a joint venture between Hoffmann + Krippner GmbH and TK-World AG and offers holistic IoT solutions. With a majority stake in Helicom, we are expanding our portfolio in the field of mobile communication (data transfer).

  • 2019

    Acquisition of industrialpartners GmbH

    With the acquisition of industrialpartners, we can now offer prototypes quickly and easily using 3D printing process. In addition, our customers benefit from an even more extensive service in the field of design & engineering.