Gravimetric moisture measurement instrument

Abstract

A measuring instrument for gravimetric moisture determination of a sample has a radiator, a weighing cell, and a sample receiver which can be connected to the weighing cell. The sample receiver allows the sample to be placed on or removed from the sample receiver. The radiator is positioned either above or below the sample, or both above and below, relative to the load direction of the weighing cell. A rotatably mounted heat conductor whose axis of rotation is orthogonal to the plane in which the sample or the sample receiver extends is positioned between the radiator and the sample. The heat conductor absorbs at least part of the radiation that impinges upon it and releases the absorbed radiation to the sample through at least one radiation-releasing surface. Through its ability to rotate, the heat conductor irradiates the entire sample surface.

Description

technical field

[0001] The invention relates to a measuring device for determining the moisture content gravimetrically. Background technique

[0002] In order to determine the moisture content in the sample, the sample is dried and the weight of the sample is measured before and after the drying process. Due to the large amount of work involved, this approach is expensive and prone to errors.

[0003] In some cases, weight loss can also be measured during drying. In a given sample, the weight loss is a function of temperature, length of drying time, and conditions in the test chamber, and it fits a curve representing sample weight as a function of elapsed time, which gradually Approximate dry weight of the sample. The curve for a given sample is determined by comparative experiments and can be expressed mathematically by an approximate formula. Measuring equipment for determining the moisture content by gravimetric analysis, suitably equipped with available electronic t...

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