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Revision as of 15:44, 5 June 2013
- A computercontrolled turbidity apparatus
- I_t = I_0e^{-(α+τ)l}
- We're looking for τ.
- Aparatus for measuring turbidity as function of temperature; includes oven to place sample in. Claims 0.001/mm accuracy and 0.5% precision.
- They measure transmitted light and assume no absorbtion; use a laser of polarized light with beam splitter.
- Use chopper to measure ac instead of dc, claim order of magnitude better long-term stability from it.
- Much improvement from simultaneous reference and measurement beam.
- A Turbidity Comparator
- Article from 1942; old aparatus, old electronics setup; not really useful.
- Comparison Type Nephelometer
- Measure transmitted and scattered light with an integrating sphere each, and direct intensity, all three at once.
- Polarized, old style (1952), not really useful.
- Development of a Precise and in Situ Turbidity Measurement System
- Can't get the article so far.
- Direct and indirect determination of the Linke turbidity coefficient
- Not relevant for us; it's about air turbidity.
- Expressions for Turbidities
- Note how to compute turbidity with only tabulated functions. Irrelevant now we have computers.
- Inverted turbidity versus concentration dependence for aqueous polynucleotide–protein mixtures: Visible turbidity at low concentrations
- Not about measurement method.
- LED marine beam transmittance meter
- Comparable to our stuff, but analog.
- 2% accuracy claimed.