Wet and Dry Basis Moisture Content

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In most applications, moisture content is expressed on a wet basis, that is, as the water mass in grams per 100 grams of the total mass, which includes the water. In drying and humidification calculations, however, the moisture content is frequently expressed on a dry basis, that is, as the water mass in grams per 100 grams of dry matter. This Demonstration plots the relationship between the two moisture content measures and converts entries expressed on a wet basis to a dry basis and vice versa.

Contributed by: Mark D. Normandand Micha Peleg (December 2014)
Open content licensed under CC BY-NC-SA


Snapshots


Details

Snapshot 1: conversion of moisture content on a wet basis to a dry basis in a high moisture food

Snapshot 2: conversion of moisture content on a dry basis to a wet basis in a low moisture food

Snapshot 3: conversion of moisture content on a dry basis to a wet basis in a high moisture food

The conversion of percentage moisture on a wet basis to a dry basis is calculated with the formula , where is the moisture content on a dry basis in g /100 g dry matter and is the moisture content on a wet basis, that is, g /100 g total mass. The conversion of moisture content on a dry basis to a wet basis is calculated with the formula .

Choose the conversion type to or to with a setter bar and select the quantity to be converted, or , with a slider. The numerical value of the converted moisture content is displayed above a plot of the relationship between and , or and , on which the chosen quantity appears as a moving dot. You can also set the axes maxima of the plot with sliders.

Reference

[1] C. E. Nyquist and R. L. Stroshine. "Relationship Between Wet Basis and Dry Basis Moisture Content." (Dec 5, 2014) engineering.purdue.edu/~abe305/moisture/html/page10.htm.



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