How to accurately detect the moisture content automatic moisture analyzer

Detection of moisture content is the instrument most food, pharmaceutical and chemical enterprise, due to domestic enterprises in recent years on the test results of increasingly high demand, also attaches great importance to the staff operating environment safety, manual water many enterprises use the original burette titration and methods to detect moisture baking oven weighing method has not adapt to the needs of the current the moisture determination accuracy and detection efficiency.

At the same time, with the development of market economy, the domestic and foreign various moisture analyzer product brand model more and more products online, a superb collection of beautiful things, prices are not the same. Users for their products in the choice of the moisture analyzer, we often feel at a loss, according to many years engaged in moisture meter products production, sales and technical service experience, puts forward some opinions on the tester only automatic water with high accuracy, to provide reference for customer selection when moisture meter.

The automatic water relatively accurate detection of moisture content measuring instrument is mainly in the following two categories:

1, heating and drying equipment with precision weighing sensor (balance) of the heating moisture analyzer, which is commonly referred to as fast moisture tester, the heating is the main method of infrared lamp (bulb), halogen lamp, microwave heating method; the most common or fast halogen moisture analyzer.

Advantages: heating moisture analyzer has the advantages of simple operation, without other auxiliary agents, only need to add a sample, or set out temperature control program can be detected; due to rapid warming and energy radiation technology, in a sample of water to more than ten minutes in a few minutes to reach equilibrium end point the test results, the efficiency and accuracy of the far put in the oven dried samples is higher than that of the traditional drying method and then use the balance detection.

Disadvantages: some manufacturers widely on the web to publish all kinds of exaggerated propaganda, let a person feel the moisture meter seems to what can be detected, the accuracy is very high, in fact, this is wrong. No matter what kind of heating moisture analyzer actually have many restrictions:

First of all, heating moisture analyzer is not completely dried in a sample of water; especially for softening sintering in the heating process, the formation of a non metal sample group, the middle contains water is difficult to be removed, and the sample heating rate, heating time have different effects on the detection results of moisture content finally, so some methods detect moisture content is not real results;

Secondly, determined in samples of heating water, such as containing other volatile oxidation or heating in the temperature range of substances, such as general solvent residue, impurities with low boiling point, low boiling point volatile substances produced by high temperature decomposition, then the detection result is not accurate;

Third, heating moisture analyzer in detecting many samples, how many are added to the sample, measure the deviation of the length of time will lead to the detection results of sample moisture content, on the whole, the accuracy of detection results of heating method is not high;

Of course, although the rapid water heating method for the determination of instrument has the defects, but for many of the original has been used long time and then the oven baking balance weighing samples of water users, using this kind of equipment is a sudden leap from the Bronze Age to the era of automation. So it's called "fast