Multichannel photometer-nephelometer | Zendy

F. Keilmann | Zendy; D. Böhme | Zendy; L. Santo | Zendy

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Multichannel photometer-nephelometer

Author(s) -

F. Keilmann,

D. Böhme,

L. Santo

Publication year - 1980

Publication title -

applied and environmental microbiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.552

H-Index - 324

eISSN - 1070-6291

pISSN - 0099-2240

DOI - 10.1128/aem.40.3.458-461.1980

Subject(s) - nephelometer , photometer , optics , wavelength , light intensity , laser , intensity (physics) , range (aeronautics) , thermostat , laser light , materials science , light scattering , physics , remote sensing , scattering , geology , composite material , thermodynamics

We describe an instrument for monitoring either transmitted or scattered light intensity, or both, simultaneously on up to eight channels. The use of a laser light source (at 632.8-nm wavelength) provides high accuracy and dynamic range: optical density can be measured from 0.0004 up to 6, and a scattered light fraction down to 10(-6) can be resolved. Built-in thermostat and magnetic stirrers allow precise monitoring of aqueous microbial growth over a practical range of 4 orders of magnitude of cell concentration.

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