Halogen Moisture Analyzer

A halogen moisture analyzer is a loss-on-drying moisture analyzer that uses a halogen lamp as the heating source — an instrument that determines moisture content by physical analysis. The traditional drying method uses the oven method: based on the principle of moisture evaporation by heating, the material is dried, and the material is weighed on a balance before and after drying to calculate moisture content. However, the oven method takes 2-4 hours per sample, which is inefficient. For enterprises with fast-paced production, the oven method severely affects production efficiency and can no longer meet their needs.

The halogen moisture analyzer is an integrated upgrade of the traditional oven method, perfectly combining the heating module, weighing module, operation module, and human-machine intelligent module. With one-touch start, results are displayed directly on the screen, and the moisture change curve throughout the heating process is displayed in real time, visualizing the sample moisture status.

Lamps filled with halogen gas such as iodine or bromine are collectively called halogen lamps. The working principle of a halogen lamp is as follows:

When the filament heats up, tungsten atoms evaporate and move toward the glass tube wall. Near the wall, the tungsten vapor cools to about 800°C and combines with halogen atoms to form tungsten halide (tungsten iodide or tungsten bromide). The tungsten halide then continues moving toward the center of the tube and returns to the hot filament. Because tungsten halide is a very unstable compound, it decomposes again into halogen vapor and tungsten when heated, and the tungsten redeposits on the filament, compensating for the evaporated portion. Thanks to this special regenerative cycle, the filament's service life is extended — almost 4 times that of an incandescent filament; VicoMeter halogen lamps last up to 6000 hours. Meanwhile, because the filament can operate at higher temperatures, it offers higher brightness, higher color temperature, and higher luminous efficiency.

Traditional halogen lamps are spherical, acting like a spotlight during heating. When testing samples, heat concentrates on one spot — on one hand, this easily scorches the center of the sample; on the other hand, it causes uneven heating, where some areas are fully dried while moisture in other areas has not yet evaporated, leading to unstable or even inaccurate readings.

Functions and Buying Guide of Halogen Moisture Analyzers

Measuring the moisture content of samples is the basic function of a halogen moisture analyzer. From the principle of the halogen moisture analyzer, we can see that the two key factors determining its accuracy are weighing and temperature. Therefore, on the basis of instrument quality assurance, temperature calibration and weight calibration are two very important functions.

Most halogen moisture analyzers on the domestic market only offer weighing calibration while neglecting temperature calibration. As an expert in moisture detection, the VicoMeter VM-E series was the first to implement and open the temperature calibration function (invention patent: [A moisture analyzer with automatic temperature calibration]; application no.: CN202211060232.7; publication no.: CN115127957A). The dual calibration function has been widely praised by the market since its launch.

A halogen moisture analyzer with both weight calibration and temperature calibration gives you more accurate data and a better user experience during testing, ensuring reliable measurement results throughout the instrument's entire lifecycle.