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Continuous pH meter
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Method for spectrophotometric compensation for colorimetric reagent variation
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Flask heater assembly
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Digital titration device
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Carbon nitrogen test system
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Method and apparatus for sampling impure water
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Method and apparatus for automatically analyzing fluids
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Method and apparatus for eliminating air during fluid turbidity measurement
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Disposable weight burette and method for carrying out titrimetric analyses
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Automatic analyzer
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Weight loss spring balance
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Liquid conductivity measuring apparatus
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Series voltage regulator wherein an fet supplies a constant current reference voltage to a differential comparator
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Iron analysis reagent formulation
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Ferroin reagent and method of making same
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Method of making comparator color wheels
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Radiation sensitive dual beam turbidimeter
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Method for the determination of acid concentrations
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