de Glossar
Top result
Application
Industry
Product
Parts
Documents
More
Effective trub removal from the hot wort: The key to beer quality

There are various methods for removing trub from the hot wort in the brewing process. The most common and effective method is the separation of hot trub and clear wort in a whirlpool. This step is crucial for the quality and stability of the finished beer.

Why is debris removal important?

By removing hot trub, the yeast is less stressed during fermentation. This leads to a more stable and efficient fermentation, as the yeast can work under optimal conditions. Uniform fermentation significantly improves the flavour quality and stability of the beer. In addition, the improved chemical-physical stability of the beer contributes to better flavour and foam stability and prevents an undesirable darker colour.

The whirlpool process

The whirlpool is a crucial step in the brewing process. Here, the hot wort is introduced tangentially into the whirlpool, creating a centrifugal force that collects the hot trub in the centre of the kettle. It is important to ensure that the trub cone remains in the centre. A turbidity measurement is carried out at the outlet of the whirlpool for monitoring purposes. This ensures that the turbidity is low and that only clear wort is sent to the next process step.

The TurbiGuard: Precise turbidity measurement

The TurbiGuard from Sigrist-Photometer is the ideal instrument for monitoring the turbidity of the whirlpool:

  • Large measuring range and therefore also suitable for high turbidity levels
  • Reliable measuring method
  • High measuring accuracy, factory calibrated with a true linearised formazine calibration
  • Allows effective control through very fast measurement
  • Tried and tested, used in many breweries
  • Robust and low-maintenance
  • Simple integration for control:
    • 0/4 ... 20 mA current outputs
    • Various bus interfaces
    • Programmable limit value signal can be used directly for control
    • Additional display on a display and control unit possible

The TurbiGuard can be easily installed in the system via a VARINLINE® process connection.

Conclusion

The correct removal of turbidity from the hot wort is crucial for the quality of the beer. The use of a whirlpool in combination with precise turbidity measuring devices such as the TurbiGuard ensures optimum fermentation and a high-quality end product. By monitoring and controlling turbidity, brewers can ensure that their beer always meets the highest standards.

Further information in our application note

More Info
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.

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

Contact distribution partner

{{selectedCountry.Name}} {{country.Name}}

Please select your businessarea

{{ba.Name}}

Please select

{{area.Name}}

Please select your businessarea

{{ba.Name}}
{{selectedCountry.Name}} {{country.Name}}
{{vm.getBusinessAreaStringByVendor(vendor)}} {{area.Name}}
{{vm.getBusinessAreaStringByVendor(vendor)}}
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:
Montag–Freitag 08:00–12:00 und 13:30–17:00
Feiertage & Betriebsferien:
Seppitag: 19. März 2025, Ostern: 18. – 21. April 2025, Auffahrt: 29. Mai 2025, Pfingstmontag: 9. Juni 2025, Fronleichnam: 19. Juni 2025, Bundesfeiertag: 01. August 2025, Maria Himmelfahrt: 15. August 2025, Allerheiligen: 01. November 2025, Maria Empfängnis: 08. Dezember 2025, Betriebsferien: 24. Dezember 2025 – 04. Januar 2026
Opening hours:
Monday–Friday 08:00am–12:00pm und 1:30pm–5:00pm
Public & company holidays:
St Joseph's Day: 19. March 2025, Easter: 18. – 21. April 2025, Ascension Day: 29. May 2025, Whit Monday: 09. June 2025, Corpus Christi: 19. June 2025, Federal Holiday: 01. August 2025, Assumption Day: 15. August 2025, All Saints Day: 01. November 2025, Conception of Mary: 08. December 2025, Company holidays: 24. December 2025 – 04. January 2026