defr Glossar

Smoke spot number

Measurement unit for the degree of blackening as defined by DIN 51402 Part 1.

The soot content of flue gas is determined by means of an individual measurement, namely quantitative retention on a filter of silica fibre material followed by measurement of the reflectance. The smoke spot number is then obtained by conversion according to VDI 2066, Sheet 8.

The German Federal Immission Control Act prescribes that combustion systems in the 5 MW to 25 MW range fired by light fuel oil must be equipped with a continuous measurement system capable of maintaining smoke spot number 1 with sufficient reliability. This is usually done with scattered light measurement either directly in the stack or using extractive sampling. The latter method protects the photometer against heat exposure and corrosion by the flue gas. Dust measurement; Flue gas monitoring

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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.

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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

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Felix Joller
Sales Manager ScrubberGuard
Öffnungszeiten:
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