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Thus in the past, megohm-cm was used, sometimes abbreviated to "megohm". Sometimes, conductivity is given in "microsiemens" (omitting the distance term in the unit). While this is an error, it can often be assumed to be equal to the traditional μS/cm. Often, by typographic limitations μS/cm is expressed as uS/cm.
The siemens (symbol: S) is the unit of electric conductance, electric susceptance, and electric admittance in the International System of Units (SI). Conductance, susceptance, and admittance are the reciprocals of resistance, reactance, and impedance respectively; hence one siemens is equal to the reciprocal of one ohm (Ω −1) and is also referred to as the mho.
where TDS is expressed in mg/L and EC is the electrical conductivity in microsiemens per centimeter at 25 °C. The conversion factor k e varies between 0.55 and 0.8. [5] Some TDS meters use an electrical conductivity measurement to the ppm using the above formula. Regarding units, 1 ppm indicates 1 mg of dissolved solids per 1,000 g of water. [6]
The susceptance is the imaginary part of the admittance .. The magnitude of admittance is given by: | | = + . And similar formulas transform admittance into impedance, hence susceptance (B) into reactance (X):
The response of the skin and muscle tissue to external and internal stimuli can cause the conductance to vary by several microsiemens. A correctly calibrated device can record and display the subtle changes. [21] The combined changes between electrodermal resistance and electrodermal potential make up electrodermal activity.
The molar conductivity of an electrolyte solution is defined as its conductivity divided by its molar concentration. [1] [2]=, where: κ is the measured conductivity (formerly known as specific conductance), [3]
The farad (symbol: F) is the unit of electrical capacitance, the ability of a body to store an electrical charge, in the International System of Units (SI), equivalent to 1 coulomb per volt (C/V). [1]
All SI unit articles have the table. The reason is so that redirects from, and/or enquiries about, microsiemens, nanosiemens etc make sense. It is easier to explain multiples in a simple table than in 21 separate articles. If a reader enquires about the unit (e.g. siemens), then the table is somewhat redundant (as you suggest). However, readers ...