What is a Humidity Testing Chamber and How Does it Work?

Humidity Testing Chamber

Humidity Chamber is probably one of the most vital testing instruments for analyzing the prolonged effects of humidity on different materials. It is popularly used for stability testing in the chemical, pharmaceutical, food and packaging industries along with plastic and rubber industries for quality assurance testing. It demonstrates varying conditions of relative humidity within a modest temperature range.

Humidity testing helps us to chalk out the behavior of materials in harsh test conditions that involve varying environments, high temperatures, and different relative humidity. The tests can be executed with constant humidity in a static or a dynamic state where moisture is used to cause a failure of the material.

Typically, a humidity testing chamber will offer temperature between 0 degree Celsius and 80 degree Celsius, with relative humidity ranging from 20% to 90%. There are also specialized humidity test chambers that may have an extended range for temperature and humidity. Humidity testing chambers have corrosion-resistant interiors and components that are particularly important due to extended exposure to damp conditions inside. Typically, these chambers also have energy efficient fans, compressors, and heaters that are very effective.

Controlling the humidity of the chamber with accuracy is fairly difficult without controlling the temperature of the machines. The higher the temperature of the chamber, higher is the air capability of handling the moisture. The relative humidity is the proportion of the volume of moisture in the air in accordance to the moisture it can hold. Thus, a steady temperature assists to ensure a constant level of relative humidity.

Several methods are used to create moisture for controlling the level of humidity in the test chamber. Listed below are the most common ones:

Steam Generator:
These tank type machines are suitably equipped with immersion heaters. As the water inside the chamber gets heated, generating steam, which rises up to the top of the chamber where cooling coils and heaters are placed. These type of chambers work on the output of the heaters and demands of relative humidity. They easily generate high volumes of moisture in big chambers and the quality of water vapor is consistent.

This type of chamber comprises a fine spray nozzle to atomize water, which is achieved in the mixing assembly. As the water passes through the chamber heater, it gets instantaneously heated and forms steam. These chambers are widely used to create a high level of humidity. These are very simple to use and are best to save electricity with use of Humidity chamber India.

Water Baths:
These systems for humidity generation also work as a steam generator but not in the form of an enclosed chamber. A small water bath is a fitted in with the mixing assembly where heaters and cooling coils are fitted. As the air is sucked into the mixing assembly, it passes through the bath and picks up the vapor. The process is very responsive due to the small amount of water. It does not require boiling to produce moisture and there is less mineral deposit inside the chamber which requires less maintenance.

Currently, conditioning chambers are the ideal Compression testing machine that are incorporated with the latest technology features to create different relative humidity and temperature inside the chamber. These ensure less heat loss ratio as they are designed with high quality of insulation with imported glass wool.

In conclusion, humidity chambers are used in a large number of industries to evaluate the effect of different weather conditions on the physical, chemical and mechanical properties of the test material during the actual working of the product.

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