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New CEO for Sigrist-Photometer
Urs Aschwanden follows Urs Imholz

The Board of Directors of Sigrist-Photometer AG has appointed Mr Urs Aschwanden as the new CEO. Urs Aschwanden has taken over the operational management from his predecessor Urs Imholz in the role of CEO as of 10 March 2025.

Urs Aschwanden has many years of professional experience in the management of national and international companies. For Daetwyler Cabling, he was responsible for the development of various Asian locations for several years and managed the environmental office inNET Monitoring AG in Altdorf and Lucerne for more than 7 years. In his last professional role, he was CEO of ITS Kanal Services AG in Kriens. Together with his team, he developed the company organically and through acquisitions into a leading competence centre for sewer and surface services in Switzerland, Germany and Austria. The Board of Directors is looking forward to working with Urs Aschwanden and wishes him joy and success with Sigrist.

At the same time, the Board of Directors would like to express its thanks and appreciation to Urs Imholz for his work for Sigrist over the past year. Urs Imholz has focussed Sigrist even more strongly on the market and sales and created new business opportunities. 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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Turbidity measurement at the lauter tun in the brewhouse of a brewery

Advantages of 25°/90° scattered light measurement:

In the brewhouse - the centrepiece of the brewing process - turbidity measurement at the outlet of the lauter tun plays an important role.

Turbidity measurement in a brewery's lauter tun is used to monitor the clarity of the wort by measuring the solids content. Precise control of turbidity is crucial to ensure the quality of the beer, as too much husk can lead to fermentation problems and flavour impairment.

Optimum turbidity values during the lautering process have a positive effect on subsequent process steps such as filtration and therefore save money by extending filter service life.

Our TurBiScat PM 40 monitors turbidity with a proven measuring principle, precisely and reliably; with MEBAK/EBC-compliant turbidity measurement using 25° scattered light measurement, the optimum method, sensitive to undissolved particles such as husks for monitoring the lautering process. Thanks to the second measuring angle at 90° for colloidal turbidity, the TurBiScat PM 40 can see even more.

Ideal both for pumping turbidity and for monitoring the entire lautering process. 80% of the lautering time the turbidity should be below 30 EBC.

The TurBiScat PM 40 offers low life cycle costs and enables an economical filtering process: lower turbidity after lautering ensures more efficient filtration later in the process with longer filter service lives and improves the chemical and physical stability of the beer.

A TurBiScat PM 40 - more than just pumping cloudy wort.


The advantages

The Sigrist TurBiScat PM 40 offers several advantages in this context:

  • Two angle measurement: By measuring the scattered light at 90° and 25°, both low and high turbidity values can be precisely recorded
  • Colour compensation: The device compensates for colour influences, resulting in greater measuring accuracy
  • Robust, maintenance-free design: Thanks to the gasket-free design with materials such as Hastelloy and sapphire, the appliance is particularly durable and low-maintenance
  • Simple calibration: Quick adjustment with a secondary standard enables uncomplicated calibration

These features make the TurBiScat PM 40 a reliable instrument for monitoring and controlling the lautering process in breweries.

Find out more in the application note >>>

More Info

USP's & Advantages

Origin

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.

Values

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.

References

Water

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

Water Reuse

ARA Neugut / Switzerland

The revised Water Protection Act, which came into effect on January 1, 2016, mandates for the elimination of micropollutants in wastewater. As a pioneering plant, ARA Neugut has been operating an ozone plant since 2014, where such micropollutants are successfully eliminated.

The installed ColorPlus 2 system ensures continuous measurement of UV absorbance at 254nm before and after the ozone reactor. This enables ARA Neugut to monitor the elimination performance and thus add ozone as needed. Additionally, the ColorPlus 2 system also performs an automatic cleaning every 3 to 4 hours to prevent biofilm growth and guarantee reliable measured values at all times.

Quality Management System ISO 9001:2008

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Leonardo Pio
Responsible for the application: Water, Industrial Processes, Beverages & Food for the regions: AG, LU, NW, OW, VS, BS, BL, SO, BE, FR, NE, VD, GE and JU
Andreas Corradini
Responsible for the application: Water, Industrial Processes, Beverages & Food for the regions: TI, GR, UR, GL, SZ, ZG, ZH, SH, SG, TG, AR and AI Traffic & Environment: whole Switzerland
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

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

Ralf Isenberg
Sales Manager ScrubberGuard
Öffnungszeiten:
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Feiertage & Betriebsferien:
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