
Development, assembly and series production of custom industrial electronics, including certified Ex applications according to ATEX and IECEx.

Sigmann Elektronik GmbH
Hüffenhardt (Hauptstraße 53, 74928)New on Amplifa
Development and Manufacturing Under One Roof
Sigmann Elektronik GmbH develops and manufactures custom electronics, electronic assemblies and complete devices at its site in Hüffenhardt in the Neckar-Odenwald district. Its range of services extends from concept discussions and requirements specification to hardware and software design, prototype and sample production, and series production with SMD/THT assembly, final assembly, testing and complete technical documentation. In addition to contract manufacturing for automation and safety technology, control, regulation and metrology as well as heating and climate technology, the company offers its own products such as climate controllers for churches, the Data-Master for energy monitoring and smart metering, as well as system technology. Since 2009, Sigmann Elektronik has been developing and manufacturing electronics and components for explosion-protected areas under its own responsibility in accordance with the ATEX Product Directive 2014/34/EU and IECEx. For prototype and tooling production, 3D printing (print volume 330 x 240 x 300 mm), CNC milling and laser engraving/laser cutting are available. Typical production volumes are up to approximately 2,000 units per product per year. The company gained international recognition through devices developed jointly with the Max Planck Institute for Medical Research in Heidelberg.
- Site
- Hüffenhardt
- Processes
- Electronics development (hardware/software design, requirements specification), Assembly of electronic assemblies (SMD / THT), Prototype production of assemblies / complete devices (from 5 WH), Series production / device manufacturing (from 10 WH), Cleaning, coating, potting of assemblies, Final assembly in housing including wiring, Optical test (MOI / AOI), in-circuit and functional test including test environment, Climate and EMC tests
- Materials
- SMD and THT assembly, Additive manufacturing (3D printing), CNC milling, Laser engraving / laser cutting, Cleaning, coating, potting, Ex types of protection e, i, t
- Certificates
- ISO 9001:2015, ATEX QAN (Directive 2014/34/EU, Annex IV), IECEx QAR, ISO 9001:2015 (TÜV SÜD), ATEX QAN 2014/34/EU Annex IV (IBExU), IECEx QAR (IBExU)
- Founded
- 1969
- Employees
- 20
- Industries
- Automation technology, Safety technology, Explosion protection/Ex area, Control, regulation and metrology, Heating and climate technology, Energy
- 01
Concept discussion and requirements specification
- 02
Hardware and software development (CAD, development systems)
- 03
Prototype/sample production including 3D printing, CNC milling, laser engraving
- 04
SMD/THT assembly of the boards
- 05
Cleaning, coating, potting
- 06
Final assembly in housing including wiring
- 07
Testing (AOI/MOI, in-circuit, functional test, climate and EMC tests)
- 08
Production documentation, packaging and shipping
- 09
EOL/obsolescence management and product support
Processes and Technology
SMD and THT assembly
Assembly of electronic assemblies for prototypes and series from 5 or 10 working hours respectively.
Additive manufacturing (3D printing)
Production of housings, prototypes, small series, holders and test fixtures, print volume 330 x 240 x 300 mm, with water-soluble support material for complex geometries.
CNC milling
In use since 2021 for prototype and tooling production.
Laser engraving / laser cutting
Custom-made front panels, labeling as well as cutting of films and thermal pads.
Cleaning, coating, potting
Individual surface and protection treatment of assemblies on request.
Ex types of protection e, i, t
Manufacture of electrical devices and assemblies of equipment group II, category 2 G and 2 D for explosive atmospheres.
Site
Hüffenhardt
DEDevelopment, manufacturing, logistics
- Lot size
- Prototypes from 5 WH, series from 10 WH, up to approx. 2,000 units per
- Materials
- SMD/THT assemblies, plastics (3D printing), films, thermal pads
- SMD placement machine
- 3D printer (330 x 240 x 300 mm)
- CNC milling machine
- 2 laser engraving machines
- Test field (AOI/MOI, in-circuit, functional test)
- Climate and EMC test environment
Products and Assemblies

Inside the production

Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Electronics development (hardware/software design, requirements specification)Engineering | – | – | – | – | – |
| Assembly of electronic assemblies (SMD / THT)Assembly | – | – | – | up to approx. 2,000 units per year | – |
| Prototype production of assemblies / complete devices (from 5 WH)Assembly | – | – | – | – | – |
| Series production / device manufacturing (from 10 WH)Assembly | – | – | – | from 10 WH – up to approx. 2,000 units/year per | – |
| Cleaning, coating, potting of assembliesSurface | – | – | – | – | – |
| Final assembly in housing including wiringAssembly | – | – | – | – | – |
| Optical test (MOI / AOI), in-circuit and functional test including test environmentTesting | – | – | – | – | – |
| Climate and EMC testsTesting | – | – | – | – | – |
| 3D printing (prototypes, small series, housings, test fixtures)Additive | – | 330 mm × 240 mm × 300 mm | – | small series | various materials (not further specified) |
| Laser engraving / laser cutting (front panels, labeling, films, thermal pads)Surface | – | – | – | – | films, thermal pads, front panels |
| Prototype and tooling production (test equipment, holders, fixtures)Assembly | – | – | – | – | – |
| Ex concept development, approval support, manufacturing for explosion-protected areas (ATEX, IECEx)Engineering | – | – | – | – | – |
| Redesign / obsolescence management of existing assembliesEngineering | – | – | – | – | – |
4 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| 3D printer | – | 1 | 330 x 240 x 300 mm (xyz) | 2020 | Hüffenhardt |
| CNC milling machine | – | 1 | – | 2021 | Hüffenhardt |
| Laser engraving machine | – | 2 | – | 2022 | Hüffenhardt |
| SMD placement machine | – | – | – | – | Hüffenhardt |
Additional services
Reference customers
Quality and Certification
Quality assurance is carried out according to a certified quality management system DIN EN ISO 9001:2015 (TÜV SÜD) and includes optical tests (MOI/AOI), in-circuit and functional tests including creation of the test environment, as well as climate and EMC tests. For the Ex area, there is a quality assurance system certified according to Annex IV of Directive 2014/34/EU (IBExU, NB 0637) as well as an IECEx Quality Assessment Report.
| Evidence | Hüffenhardt |
|---|---|
| ISO 9001:2015 (TÜV SÜD) | |
| ATEX QAN 2014/34/EU Annex IV (IBExU) | |
| IECEx QAR (IBExU) |
Company History
- 1969
Company founded by Karl-Heinz Sigmann
- 1982
Sigmann Elektronik GmbH established
- 1997
Move to the current company building in Hüffenhardt
- 2003
Company taken over by Heiko Weber
- 2008
Certification according to ISO 9001:2008
- 2009
Certification according to the ATEX Product Directive 94/9/EC
- 2012
Expansion of production and office space by 250 m²
- 2013
Introduction of own products in the field of system technology
- 2014
Expansion of SMD production by 120 m²
- 2015
Certification according to IECEx
- 2017
Certification according to ISO 9001:2015
- 2019
50 years of Sigmann Elektronik
- 2020
Expansion of prototype production with a 3D printer
- 2021
Expansion of prototype production with a CNC milling machine
- 2022
Additional laser engraving machine; Jonas Weber becomes managing director alongside Heiko Weber
- 2023
Expansion of warehouse space by 200 m²