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DirectoryBusiness & Technical ServicesEngineerFlumsSF Elektro-Engineering AG
SF Elektro-Engineering AG Logo
Verified· 5 sourcesOwner confirmed
Last updatedSeptember 10, 2026

Contact

Summary

About the company

Die SF Elektro-Engineering AG ist ein führendes Schweizer Ingenieurbüro für industrielle Automation, Elektroplanung und Systemtechnik. Mit rund 40 Jahren Erfahrung und mehr als 60 Spezialisten bietet das nach ISO 9001, Siemens und ePLAN zertifizierte Unternehmen massgeschneiderte Lösungen für den Maschinen- und Anlagenbau. Das Leistungsspektrum reicht von SPS-Programmierung, Antriebstechnik und Maschinensicherheit über Retrofit bis hin zum 24/7-Support. Als verlässlicher Engineering-Partner steigert SF Elektro-Engineering die Effizienz und Zukunftsfähigkeit Ihrer Produktionsanlagen.

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Offering

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Trust Score4.4/5

SF Elektro-Engineering AG

Industry:Engineer
✓ Offered11
Industrial automation and control systems
Industrial automation and control systems for production and process plants, including planning, programming, commissioning and lifecycle support.
Advisory, project management and engineering
Advisory, project management, engineering, control systems and maintenance for plant and automation projects, from concept to operation.
Electrical design
Electrical design for power distribution, power quality and standard-compliant dimensioning, considering machine safety, ATEX zones, VKF and NIN.
Automation / control
Automation and control with control and automation systems, operator and monitoring systems, industrial communication and process control engineering.
Drive technology
Drive technology for industrial production, welding technology, coatings, robotics, storage and conveying technology, pumps, fans, compressors and cranes.
Weighing technology
Weighing technology and measurement and testing technology for high-dynamic test rigs, weights, forces, temperatures, coating thicknesses and data-based visualisation.
Data traceability
Data traceability with data capture, alerts, database connectivity and interfaces for industrial plants and ERP tools.
Embedded systems
Embedded systems for industrial applications, including software, simulation, testing, connectivity and a lab environment to prepare commissioning.
Machine safety
Machine safety for industrial plants, with standard-compliant design, safety requirements, safety shortcomings and protection of employees.
On-call & storage
On-call and storage service with 7x24 availability, remote maintenance and spare part availability for rapid fault rectification.
Retrofit
Retrofit of existing plants with modernisations, conversions and replacement solutions for discontinued key components, including risk analysis, documentation and productivity improvements.
Expertise

Expert

Patrik Schlegel
Patrik Schlegel
Owner & CEO

Approachable leadership with customer contact at eye level and expertise in industrial automation

Qualifications & certifications
BSc Elektrotechnik2021
EFZ Elektroplaner2015
Trust & reputation

ranQ Trust Score of SF Elektro-Engineering AG: 4.4 out of 5.0

Trust Score4.4/ 5.0

Very high

x

Data basis 100% · As of November 2026

SF Elektro-Engineering AG scores 65.9 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
x
CriterionValueWeight
  • Review quality: The average rating across all connected sources, smoothed against the industry mean. So 5.0 stars from three reviews do not outrank 4.7 from three hundred.79.224%
  • Review volume: The number of reviews across all sources. The scale is logarithmic: the first reviews count the most, and the maximum is reached at 50 reviews.58.610%
  • Review recency: The age of the most recent review. Two-year-old reviews deliberately sit in the middle, because that is normal for Swiss SMEs. Only after three years without a new voice does the value drop markedly.35.08%
SF Elektro-Engineering AG scores 94.3 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.100.012%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.90.07%
SF Elektro-Engineering AG scores 100.0 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
x
CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).100.022%
SF Elektro-Engineering AG scores 14.3 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.28.64%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.0.04%
Qualifications+0.15

SF Elektro-Engineering AG reaches a ranQ Trust Score of 4.4 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.9 out of 5 stars from 9 customer reviews. As of November 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Reviews

Aggregated rating

Aggregated rating
4.9
of 5

Aggregated from 9 reviews across all connected sources

Sources
GGoogle4.99
★TrustpilotSoon
PProvenExpertSoon

Further sources are added continuously and factored into the ranQ Rating.

Common questions

Answers

Do you also support machine safety and standards?
Yes, we plan and assess safety solutions for industrial facilities in compliance with standards. In doing so, we take into account, among other things, machine safety, ATEX zones, VKF and EN ISO 13849, EN 62061, EN 60204 and IEC 61508, NIN and NIV. The aim is maximum plant output without compromising plant safety.
Do you also take on electrical planning for new systems?
Yes – electrical planning for new facilities is part of our core offering as an extended workbench. We take care of the complete electrical planning: from conception through wiring diagrams and schematics to switchgear documentation, including consideration of applicable standards for machine safety, power quality, ATEX, VKF, NIN, NIV, and more, up to the software of the automation solution. Whether as a partial engagement to relieve your engineering team or as a complete project execution – we integrate into your existing processes and standards, so that your team remains free for core tasks.
Which industries, sectors and plants do you service?
We primarily service companies in the machinery and plant engineering sector and their suppliers, with a focus on vacuum and coating technology (including semiconductor/PVD systems), bulk material handling and conveying technology as well as crane and lifting technology. In addition, we support OEMs across industries in new developments and retrofit projects. What matters is not the industry but the need: we are the right partner when engineering capacity for automation and machine safety is required.
What services does SF cover in engineering overall
Our range of services includes electrical planning, software programming, and machine safety for the development of new systems or for retrofits of existing systems. SF Engineering supports your projects with EMSRL specialists – for a specific project, point-based, or on a permanent basis. You can selectively add individual services or hand over a complete project to us – aligned with your existing processes and capacity bottlenecks.
When is engineering outsourcing to SF-Engineering suitable?
Engineering outsourcing to SF is suitable for companies where the full costs of a new hire – recruitment, onboarding, tooling, training – are no longer economical compared to external project hours. Studies quantify these full costs at 50–200% of the annual salary. It is especially worthwhile when short-term capacity is required: Faster time-to-market or clearing large backlogs can be flexibly achieved with an external partner – hardly with permanent staff.
Press

Media

Media
Local CH
local.ch
Retrofit Getreidesammelstelle
youtube.com
Retrofit Glasproduktion
youtube.com
Retrofit Hobelwerk
youtube.com
Blog
Swissmem SEMI
linkedin.com
Portrait
Maintenance Schweiz
maintenance-schweiz.ch
Portrait
Prexcon
prexcon.ch
Media
Saubere Energie vom Dach
assets.new.siemens.com
Media
SOLIDS Zürich
solids-zurich.ch
Blog
NZZ, AGZ, usw.
linkedin.com
Credentials

Certifications & memberships

Siemens Solution Partner
EPLAN Certified Engineer (ECE)
PSAgA
CMSE Maschinensicherheitsexperten Elektrik
ISO9001
ISO9001 zertifiziert seit 2002
October 20, 2028
Knowledge

Articles about SF Elektro-Engineering AG

3 articles
5 min read

Why control systems at harvest time must not fail

At SF Electro-Engineering we repeatedly see the same pattern in this context: It is not the technology itself that is the problem, but the moment you touch it. When harvest is underway, every hour counts, so planning must be in place before the season starts, not during it.

October 16, 2026·Read article
Comparisons

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Contact

Location

Marktstrasse 21
8890 Flums

At a glance

Legal form
Corporation
UID
CHE-103.856.831
Founded
1987 · 39 years
Last commercial register change
April 14, 2025
Employees
51 to 100

Active throughout Switzerland

  • AGAargau
  • AIAppenzell Inner Rhodes
  • ARAppenzell Outer Rhodes
  • BLBasel-Country
  • BEBern
  • FRFribourg
  • GEGeneva
  • GLGlarus
  • GRGrisons
  • JUJura
  • LULucerne
  • NENeuchâtel
  • NWNidwalden
  • OWObwalden
  • SHSchaffhausen
  • SZSchwyz
  • SOSolothurn
  • SGSt. Gallen
  • TGThurgau
  • TITicino
  • URUri
  • VSValais
  • VDVaud
  • ZGZug
  • ZHZurich
  • BSBasel
  • BSBettingen
  • SOKleinlützel
  • BSRiehen
  • BLRoggenburg
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.
100.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
  • 5 min read

    How does Retrofit help Siemens obsolescence?

    Many plants still run mechanically flawlessly, while control, drive or operator panel already come from a range no longer produced. This gap between functioning mechanics and outdated automation is the point where we at SF Elektro-Engineering AG see the greatest need for action in practice.

    September 18, 2026·Read article
    5 min read

    How to modernize a grain collecting station in Retrofit?

    We at SF Elektro-Engineering AG repeatedly see in such projects certain patterns: the bottleneck is not the most visible component, but the coordination within the overall system. That is why a retrofit in a historically grown plant is particularly worthwhile when operating reliability, standard compliance and availability are to be improved simultaneously.

    September 11, 2026·Read article
    Full methodology