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Humidity Chambers

A reliable source for Humidity Chambers information and leading Humidity Chambers Companies & Manufacturers.

Humidity chambers are used to examine how a product will react to varying humidity levels. This mechanism helps identify the safety level and expected shelf life of a product. The humidity chambers are designed to facilitate engineers and manufacturers by determining the length of the usefulness of the product. They also help in understanding the humidity level a product can withstand. Read More…

Humidity Chambers Humidity chambers are the environmental test chambers designed specifically to replicate conditions of varying humidity in a controlled environment.
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Leading Manufacturers

Holland, MI  |  616-392-3161

Russells Technical Products has been designing and manufacturing environmental test chambers since 1972. With over 150 years of combined management experience, our company provides its customers with quality environmental test systems and advanced manufacturing techniques. Russells offers a variety of standard and custom designed chambers to meet your exact specifications.

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Russells Technical Products $$$

Cincinnati, OH  |  877-233-9871

We are leading environmental test chamber brand with over 78 years of experience designing environmental testing solutions. Over the years we have developed products for ease-of-use, reliability and performance designed to meet our customer’s testing needs and improve the safety and reliability of their products. We have a legacy of providing high quality solutions for temperature, humidity, altitude, thermal shock, combined environments, HALT/HASS and more; in sizes ranging from benchtop to large walk-in/drive-in chamber for full-vehicle testing. Please contact us today for more information!

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Cincinnati Sub-Zero (CSZ) $$$

Holland, MI  |  616-393-4580

A pioneer since 1962, Thermotron has been building the most recognizable environmental test equipment in the industry. Every chamber and shaker sold is handcrafted in West Michigan and comes with an intuitive controller. From automotive and defense, to electronics and medical industries, Thermotron has helped companies small and large create more reliable products. When you need to know whether your product(s) will stand the test of time, rely on proven test chamber from Thermotron.”

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Thermotron Industries $$$

Grand Rapids, MI  |  800-368-4768

As a leader in the test chamber industry we believe our systems are ideal for your company. We manufacture models that come standard with many useful features for testing applications. We believe that our advanced technologies are essential to the reliability of our products and our quality customer service is perfect for your needs. Feel free to visit our website or give us a call to learn more!

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Weiss Technik $$$

San Jose, CA  |  408-945-7861

Our humidity chambers come in two standard configurations. Table top chambers have a humidity range of 30 to 95% RH while the medium size chambers have a humidity range of 20 to 98% RH. All of our chambers are equipped with powerful programmable controllers that include a LCD display. Our chambers are designed with “Go Green” features using an energy efficient method for heating and cooling. These chambers can also be made to the customers’ unique specifications. Contact us to learn more!

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Hastest Solutions $$$

Hatfield, PA  |  800-314-3332

Isotech specializes in state-of-the-art environmental test chambers. With our standard and custom test chambers we strive to offer our clients products that are specifically designed to fit their needs. Isotech offers technical specifications like copper screen enclosures, RF signals, and USC-26 and USC-44 series panels.

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Isotech, Inc. $$$

St. Louis, MO  |  877-783-6774

Offering premium solutions in the form of environmental test chambers, humidity test chambers, temperature chambers, salt spray chambers, walk-in test chambers, benchtop test chambers and thermal shock chambers, Darwin Chambers Company is one of the premier environment test chamber suppliers. Environmental chambers applications include film and photography to curing rooms and bench top testing.

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Darwin Chambers Company $$$
placeholder image Russells Technical Products Cincinnati Sub-Zero (CSZ) Thermotron Industries Weiss Technik Hastest Solutions Isotech, Inc. Darwin Chambers Company

Humidity chambers are used to examine how a product will react to varying humidity levels. This mechanism helps identify the safety level and expected shelf life of a product. The humidity chambers are designed to facilitate engineers and manufacturers by determining the length of the usefulness of the product. They also help in understanding the humidity level a product can withstand. Humidity chambers are also used as extended testing chambers to record the product’s reaction to elevated moisture when exposed for weeks or months. Depending on the product type and data required, different varieties of humidity chambers allow testing in static as well as dynamic states.

Humidity Chambers

Construction of Humidity Chambers

Humidity chambers are constructed carefully so they can give accurate and reliable results regarding the product's performance. They are made of durable material that is capable of withstanding the conditions the chamber creates.

  • The chamber is double-walled; it can be welded or modular. Welded wall is preferred, as it gives better sealing to avoid contamination.
  • The sealing of the chamber is important to restrain any contaminant from entering. The sealing materials are rubber, glass wool, silicone, or other polymers.
  • Cooling compressors and heating coils are installed to control temperature and humidity.
  • For air supply air ducts, circulating wheels or fans are installed.
  • Controllers are present in the chamber to maintain desired conditions.
Construction of Humidity Chambers

Working of Humidity Chambers

Humidity chambers work on the principle of relative humidity. Temperature is the key factor in determining humidity level; therefore, these both work together. The humidity chambers work by the following process:

  • A targeted dew point temperature is maintained, and then the chamber is reheated to a specified air temperature.
  • This maintenance of constant dew points will produce constant relative humidity.
  • The air from the conditioned area is passed through the water spray area within a closely controlled temperature.
  • When this air passes through the water spray, it is cooled down to the water temperature and reaches saturation.
  • Through a mist eliminator, the air leaves the spray chamber. This removes any excess water vapor present.
  • An electric heater is used to heat up the air, and then it is retired to the conditioned space.
  • The water spray temperature is adjusted automatically by the RH sensor.
  • This method helps in achieving a precise humidity level in the chamber.

Methods of Humidity Generation

Steam Generators

  • Steam generators are a method to produce humidity in the chamber.
  • They are tank-type machines that have duly equipped immersion heaters.
  • On the top of the chamber, cooling coils and heaters are present.
  • The water is heated in the chamber, and steam is produced.
  • This steam moves upward to the cooling coils and demands relative humidity.
  • The water vapors produced in these generators are consistent.
  • Big chambers can easily generate a high volume of moisture.
Steam Generator Temperature and Humidity Chamber


  • An atomizer has a fine spray nozzle that is used to atomize water.
  • Atomization is done in the mixing assembly.
  • On entering the chamber, the atomized water is instantly heated.
  • This creates a high level of humidity in the chamber.
  • Atomizers are the best to use because they are simple to use, save electricity, are capable of generating huge amounts of steam, and have no issues with heater burn-out.

Water Bath

  • A water bath is also a type of steam generator, but it is not an enclosed box.
  • The water bath is placed in the mixing assembly along with cooling coils and heaters.
  • When air enters the assembly, it immediately picks up vapors.
  • Water baths are easy to clean and maintain because less boiling is required in this process.
  • Less boiling means less mineral deposit in the chamber.
  • Water baths are responsive due to the small amount of water.
Water Bath

Types of Humidity Chambers

Bench-top Humidity Chamber

Bench-top chambers are cost-effective and are used for testing small products. These are designed for research labs or small businesses.

Reach-in Humidity Chamber

These chambers have smaller footprints and are in a vertical configuration for easy access. These are designed with castors or wheels and come in several sizes.

Walk-in Humidity Chamber

Walk-in humidity chambers are in modular construction and can be installed as a single unit. These chambers are used by automotive, electronics, and battery manufacturers.

Drive-in Humidity Chamber

Drive-in chambers are big enough to test vehicles. In these chambers, all vehicle parts are tested under all climatic conditions.

Industries Using Humidity Chambers

Humidity chambers are widely used by industries such as rubber, pharmaceutical, automotive, aerospace, military, defense, plastic, electronic, medical, and battery manufacturers to check the validity and efficacy of their products before launching them on the market.

Humidity Chamber Informational Video

Test and Measurement Equipment

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