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New CEO for Sigrist-Photometer

The Board of Directors of Sigrist-Photometer AG has appointed Mr. Urs Imholz as the new CEO. He will take over the operational management from his predecessor Markus Stolz in the role of Managing Director.

Urs Imholz was a member of the GWF management team for 14 years. Alois Amstutz, Chairman of the Board of Directors of Sigrist, explains the choice as follows: "Urs Imholz has entrepreneurial flair, extensive specialist and market knowledge and an authentic management style. He will continue to develop Sigrist-Photometer in the long term." Urs Imholz will join Sigrist at the beginning of 2024.

At the same time, the Board of Directors would like to express its thanks and appreciation to Markus Stolz for his work for Sigrist over the past four years. Markus Stolz has led Sigrist through a modernization process and strategically realigned the company. He is leaving the company at his own request. The Board of Directors wishes him all the best for his personal and professional future.

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The new TurBiScat PM 40

The TurBiScat PM 40 measures turbidity in beverages, optional also colour in beer; MEBAK / EBC / ASBC conform. The TurBiScat thus additionally becomes an inline colour meter. The combination of Hastelloy and Sapphire in a sealless design allows use in virtually all processes applications. The TurBiScat PM 40 determines turbidity with optimum colour compensation using scattered light measurement and is MEBAK/EBC compliant. Learn more about the technical details and the applications: TurBiScat PM 40

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USP's & Advantages


Our company is an independent Swiss SME and enjoys a very good image as a manufacturer of high quality process photometers on the world market. Our customers benefit from our years of experience and best Swiss quality.


Our company culture is based on a symbiosis of material and immaterial values that we maintain and develop for the benefit of all stakeholders.

Swiss Innovation

Our products provide solutions to real needs of the society, of people and of the environment. In terms of quality, reliability and uniqueness, they meet the highest standards and provide significant benefits to our customers.

Ethics + Responsibility

Our focus is directed at responsible corporate behaviour. We consider fairness, reliability and sustainability as much as factors of success as economic aspects.



Consorci d'Aigües de Tarragona (CAT) / Spain

The latest European Directive 2020/2184 established turbidity as a basic control parameter for the quality of drinking water. In anticipation of the new regulations, the Sigrist distribution partner in Spain, teqma, has worked with the Consorci d'Aigües de Tarragona (CAT), the water consortium of the city of Tarragona, to renew its turbidimeters. Tarragona is in the province of Tarragona with 860,000 inhabitants.

CAT installed the AquaScat 2 WTM from the Swiss company Sigrist-Photometer AG at the various measuring points of the treatment plant and the distribution network.

The AquaScat 2 WTM turbidity meter measures the turbidity in the free-falling water jet and thus enables a high resolution and accurate measurement down to low turbidity values of 0.001 FNU.

Consorci d'Aigües de Tarragona

»Due to the high resolution (0.001 FNU) allowing early detection of changes in water quality, low maintenance and easy calibration, the Sigrist turbidimeter turned out to be the measuring device we were looking for our water supply.«

Consorci d'Aigües de Tarragona, Spain

Traffic & Environment

Road tunnel Gotthard / Switzerland

Since September 2007, a total of 210 Sigrist smoke detectors of the type FireGuard are in use in the Gotthard tunnel and its approach tunnels. Together with additional sensors such as linear fire alarm cables, flow measurement devices etc., the smoke detectors are the basis for the early detection of smoke and fire events.

In September 2016, after a period of use of 9 years, Mr. Werner Furrer, head of the Office for the Operation of National Roads (Switzerland), summarized their experience with the FireGuards as follows:

  • On average, there was one event per month, which was detected without fault
  • In a smoke event, the FireGuard is always the fastest system
  • No false alarms owing to correct parameterisation
Customer road tunnel Gotthard traffic signs © Raimond Spekking / CC BY-SA 4.0 (via Wikimedia Commons)

»We have had no failures so far. Sigrist FireGuard smoke detectors are very reliable.«

Mr. Werner Furrer

head of the Office for the Operation of National Roads in Flüelen

Quality Management System ISO 9001:2008

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René Gehri
Water, Beverages & Food, Industrial Processes
Florian Bodmer
Ihr Businesspartner für Industrielle Prozesse, Getränke & Lebensmittel, Verkehr & Umwelt:
Für Wasser kontaktieren Sie unseren Hauptsitz.

Your distribution partner for industrial processes, beverages & food, traffic & environment:
For water please contact our headquarters

Ihr Businesspartner für Getränke & Lebensmittel:
Für Wasser, Industrielle Prozesse, Verkehr & Umwelt kontaktieren Sie unseren Hauptsitz.

Your distribution partner for beverages & food:
For water, industrial processes, traffic & environment please contact our headquarters

Contact headquarters

Felix Joller
Sales Manager ScrubberGuard
Montag–Freitag 08:00–12:00 und 13:30–17:00
Feiertage & Betriebsferien:
Ostern: 07.–10. April 2023, Auffahrt: 18. Mai 2023, Pfingstmontag: 29. Mai 2023, Fronleichnam: 08. Juni 2023, Bundesfeiertag: 01. August 2023, Maria Himmelfahrt: 15. August 2023, Allerheiligen: 01. November 2023, Maria Empfängnis: 08. Dezember 2023, Betriebsferien: 23. Dezember 2023 – 02. Januar 2024
Opening hours:
Monday–Friday 08:00am–12:00pm und 1:30pm–5:00pm
Public & company holidays:
Easter: 07.–10. April 2023, Ascension Day: 18. May 2023, Whit Monday: 29. May 2023, Corpus Christi: 08. June 2023, Federal Holiday: 01. August 2023, Assumption Day: 15. August 2023, All Saints Day: 01. November 2023, Conception of Mary: 08. December 2023, Company holidays: 23. December 2023 – 02. January 2024