Question: What is the difference between EPA and ISO optical sensors in turbidity measurements? A sensor that uses the ISO 7 0 2 7 method includes

What is the difference between EPA and ISO optical sensors in turbidity measurements?
A sensor that uses the ISO 7027 method includes a light source with a wavelength of 830 to 890 nanometers. Sensors that use the EPA 180.1 method contain a white light source.
ISO meters use monochromators while EPA meters use filters.
EPA compliant meters have detector centered at 90 to the incident light path while in ISO sensors the detector is placed along the incident light path.

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