de Glossar

UV absorption and color are two important parameters to secure quality of the drinking water. UV absorption at 254 nm is indicating humic substances, but detects in addition also other organic compounds as mineral oils, aromats, solvents, etc. These substances normally have to be removed by active carbon filtration. Generally, there is a fixed relation between the UV absorption value and the DOC value. So continuous UV absorption measurement may by used as a trend analysis of the DOC value, e.g. for monitoring of raw water. Other typical applications are monitoring of ozonization and activated carbon filtration to secure sufficient disinfection or removal of organic substances. Furthermore, the color can be measured at a wavelength of 436 nm. Continuous monitoring of raw water and treated water allows optimized control of the treatment process and results in a constant quality of the drinking water.

The new absorptiometer ColorPlus from SIGRIST is tailored to these applications. Out of a modular system, a customer specific setup can be realized, independent if in-line or bypass, color or UV absorption or a combination of both, results in E/m or Hazen. The dual beam measuring method and the integrated soiling compensation result in an excellent stability and reliability of the measuring value. Options as turbidity compensation or measurement at up to three different wavelengths complete the range of features.

Products: ColorPlus bypass | ColorPlus in-line| ColorPlus O3 Water

Contact distribution partner

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

Please select your businessarea


Please select


Please select your businessarea

{{selectedCountry.Name}} {{country.Name}}
{{vm.getBusinessAreaStringByVendor(vendor)}} {{area.Name}}
René Gehri
Water, Beverages & Food, Industrial Processes
Pascal Schärer
Traffic & Environment

Contact headquarters

Felix Joller
Sales Manager ScrubberGuard
Montag–Freitag 08:00–12:00 und 13:30–17:00
Feiertage & Betriebsferien:
Ostern: 15. – 18. April 2022, Auffahrt: 26. Mai 2022, Pfingstmontag: 06. Juni 2022, Fronleichnam: 16. Juni 2022, Bundesfeiertag: 01. August 2022, Maria Himmelfahrt: 15. August 2022, Allerheiligen: 01. November 2022, Maria Empfängnis: 08. Dezember 2022, Betriebsferien: 24. Dezember 2022 – 02. Januar 2023
Opening hours:
Monday–Friday 08:00am–12:00pm und 1:30pm–5:00pm
Public & company holidays:
Easter: 15. – 18. April 2022, Ascension Day: 26. May 2022, Whit Monday: 06. June 2022, Corpus Christi: 16. June 2022, Federal Holiday: 01. August 2022, Assumption Day: 15. August 2022, All Saints Day: 01. November 2022, Conception of Mary: 08. December 2022, Company holidays: 24. Decmber 2022 – 02. January 2023