de Glossar



SIGRIST-PHOTOMETER AG, with its roots and headquarters in Ennetbürgen in Switzerland, has been developing, manufacturing and marketing high-quality optical measuring instruments for use in the fields of water treatment, food industry, industrial processes as well as traffic and environment since 1946. The company is one of the technology and quality leaders and sells its products in more than 80 countries. With great commitment, its 85 employees contribute to the sustainable positive development of the company and its value-based culture.

The wide network of sales and service partners provides competent advice worldwide and supports customers in the practical use and service of all SIGRIST products and systems.

What our employees say

Our open positions

SIGRIST headquarters



Markus Stolz CEO / Managing Director
Mathias Bermejo Head of Finance, Personnel and IT
Pascal Schärer Head of Sales and Marketing
Dr. Marc Achermann Head of Research and Development
Ruedi Tschanz Head of Production, Purchase and Logistics
Reto Eigenmann Head of Customer Service




One of the first SIGRIST Photometer



Found no matching position? As a growing, internationally operating Swiss SME, we are always interested in capable and quality-conscious employees at all levels of the company. Are you looking for an exciting challenge?

Then send your complete application documents without obligation to:

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The goal of our management system is to permanently improve all internal processes and activities, and also to optimally tailor our services and products according to the needs and expectations of our customers and stakeholders. To this end, our management system is a comprehensive planning, management and control tool for the constant optimization of our processes and services.

Zertifikat ISO 9001:2015

System certifications

  • Quality management according to ISO 9001:2015
  • Environmental management according to ISO 14001:2015
  • Occupational health and safety management according to ISO 45001:2018
  • Known consignor (BAZL)

Thumbnail of Sales literature 11748E Rev. 4
IQNet and SQS Certificate Management System
Details Other languages & file formats Download PDF – English – 228

Product certifications and testing

  • ATEX 2014/34/EU, EN ISO 80079-34 and IECEx OD 025 Ed. 3 for equipment used in explosive atmospheres
  • Manufacturer’s declarations according to EN 1935/2004 for equipment with special hygiene requirements
  • Component certifications according to the European Hygienic Engineering & Design Group (EHEDG) (Type EL – Class I) for individual instruments.
  • Suitability criteria met according to EN 14181 and EN 14956 QAL 1 for dust measuring devices.
  • IMO certificate (U.S. Coast Guard Certificate) and KCs certificate (Korea Safety Certification)
  • GOST certificates 2014 – 2019 for VisGuard, FireGuard (Russia)

These certificates can be found on the corresponding product page, under documents / certificates.

Other roles and commitments

  • Member of the SUVA "Sicherheits-Charta" (safety charter)
  • We support the “Conflict Minerals” supply chain initiative as detailed in the Dodd-Frank Wall Street Reform and Consumer Protection Act. As a manufacturer of optical measuring instruments, we strive to ensure all of our purchased parts are made from conflict-free materials.
  • We fully implement the provisions of the RoHS Directive 2011/65/EU. Our products do not contain any substances in concentrations that exceed the limits for forbidden materials as detailed in the EU Directive.


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René Gehri
Water, Beverages & Food, Industrial Processes
Pascal Schärer
Traffic & Environment