If an oil-in-water content monitor uses a lamp emitting light in the visible spectra in conjunction with a reference photocell and a sampling photocell, what is the operating principle upon which this oil-in-water content monitor works?

Question

Accepted Answer

The monitor works on the absorption/scattering principle where the greater the oil content, the less the amount of visible light detected by the sampling photoelectric cell as compared to the reference photoelectric cell.

Answer

The monitor works on the fluorescence principle where the greater the oil content, the less the amount of ultraviolet light detected by the sampling photoelectric cell as compared to the reference photoelectric cell.

Answer

The monitor works on the fluorescence principle where the greater the oil content, the greater the amount of ultraviolet light detected by the sampling photoelectric cell as compared to the reference photoelectric cell.

Answer

The monitor works on the absorption/scattering principle where the greater the oil content, the greater the amount of visible light detected by the sampling photoelectric cell as compared to the reference photoelectric cell.