Delta Faucet DF-745 Manuel D’Utilisation
Theory of Operation DF-745
77
10 Theory of Operation
10.1The Moisture Measurement
10.1.1
Moisture and the IR Spectrum
Figure 84: Schematic of Moisture Cell
The Nanotrace Moisture analyzer uses infrared (IR) absorption as its detection method. IR
absorption is but a subset of the overall field of “spectroscopy,” which measures the
interaction of light and matter.
absorption is but a subset of the overall field of “spectroscopy,” which measures the
interaction of light and matter.
The basis of absorption spectroscopy is when an electromagnetic wave (i.e., the scientific
description of “light”) with a particular wavelength impinges on a substance that absorbs a
fraction of the total electromagnetic radiation. The wavelength of radiation is well known,
for instance, in differentiating colors in the visible light spectrum.
description of “light”) with a particular wavelength impinges on a substance that absorbs a
fraction of the total electromagnetic radiation. The wavelength of radiation is well known,
for instance, in differentiating colors in the visible light spectrum.
In the infrared spectral region, the wavelength of light overlaps with discrete absorptions
created by molecular vibrations. IR absorption is often used in diagnosing molecular
composition based on “fingerprints” of these absorptions over a wide wavelength range.
Conversely, if the strength of a single vibrational absorbance is known, a single wavelength
is often used to determine the amount of a particular substance. This is how we measure
moisture.
created by molecular vibrations. IR absorption is often used in diagnosing molecular
composition based on “fingerprints” of these absorptions over a wide wavelength range.
Conversely, if the strength of a single vibrational absorbance is known, a single wavelength
is often used to determine the amount of a particular substance. This is how we measure
moisture.