Talk:Units for Moisture Measurement

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I would rather call this article Parameters for Moisture Measurement

Author: Hans-Jürgen Schwarz

back to Moisture Maybe rather Material Moisture Content?


Key parameters

Commonly used parameters are:

  • Mass related moisture content
  • Volume related moisture content
  • Saturation humidity: maximum capillary moisture content /absorption at atmospheric pressure or vacuum (by immersion)
  • Equilibrium moisture content: moisture absorption due to hygroscopicity
  • Maximum degree of pore filling
  • Hygroscopicity related degree of pore filling


Table 1: Parameters for the moisture related characterization of a material
Parameter Equation Explanation
Mass related material moisture content
um in [M%]
Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle u_m=\frac{m_W}{m_T}\cdot 100=\frac{m_F-m_T}{m_T}\cdot 100} mW = Mass of water sorbed by the sample in [g]
mF = Mass of the humid sample in [g] at sample collection
mT = Mass of the dry sample in [g] (from the moment of drying up to a constant weight)
Volume related material moisture content
uv in [Vol%]
Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle u_V=\frac{V_W}{V_T}\cdot 100=u_m \cdot\frac{\rho_T}{\rho_W}} VW = Volume of the water sorbed by the sample in [cm³]
VT = Volume of the dry sample at sample collection in [cm³]
um = Mass related moisture content in [M.%]
Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle \rho} T = Density of the dry sample in [g/cm³]
Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle \rho} W = Density of the water in [g/cm³]
Saturation humidity of a material
us in [M%]
Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle u_S=\frac{m_F_S-m_T}{m_T}\cdot 100} mFS = Mass of the moisture saturated sample [g]
mT = Mass of the dry sample in [g]
Hygroscopicity related equilibrium moisture content of a material
uA in [M%]
Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle u_A=\frac{m_F_A-m_T}{m_T}\cdot 100} mFA = Mass of a sample after hygroscopic moisture absorption
mT = Mass of the dry sample in [g]
Total degree of pore filling PFGG in [M%] Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle PFG_G=\frac{u_m}{u_S}\cdot 100} um = Mass related moisture content in M.%
us = Saturation humidity in [M%]
Hygroscopicity related degree of pore filling
PFGH in [M%]
Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle PFG_H=\frac{u_A}{u_S}\cdot 100} ] uA = Hygroscopicity related equilibrium moisture content in M.%
us = Saturation moisture content in [M%]


--SLeithaeuser 21:59, 27 January 2013 (CET)