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Humidity Chambers

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

Humidity testing is undertaken for the purposes of evaluating products, materials, and components in response to differing conditions of water vapor or moisture present in the environment. 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 $$$

Perry, IA  |  800-695-2743

Percival Scientific continues to set the standard of excellence for environmental growth chambers by designing and manufacturing several lines of reliable plant growth chambers, incubators and special application chambers. We offer the largest choice of both Select Series by Percival and custom solutions designed to meet your specific research requirements, timelines and budgets.

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Percival Scientific, Inc. $$$
placeholder image Russells Technical Products Cincinnati Sub-Zero (CSZ) Thermotron Industries Weiss Technik Hastest Solutions Percival Scientific, Inc.
Industries such as aerospace, military, automotive, medical, and construction use humidity chambers in the testing of their products and materials due to the capability of moisture to drastically alter elements. Corrosion, warping, biological growth, and cracking are all conditions that could result from the exposure of a product or material to extremes of humidity. Therefore, it is imperative that manufacturers comprehensively test their products for the environmental conditions they will encounter during their lifespan in order to reveal these potential flaws or malfunctions. These test results allow engineers to rethink product design and manufacturing in order to produce the most reliable and cost-effective solutions for their target market. This is especially beneficial to manufacturers whose products come under guarantee or warranty because a product that has already been tested and improved is less likely to result in high reimbursement charges for the manufacturer. While high humidity is most commonly the cause of damage, in areas of low humidity, it is likely that products intended for an outdoor environment will be exposed to greater amounts of dust and/or sand and therefore it might be conscientious of a manufacturer to undergo environmental tests for those conditions too. Air moisture content ratio, or relative humidity, can be replicated in humidity chambers ranging from 10-100%. The design and construction of the humidity chambers have to be carefully considered as the manufacturer's decisions rely on the validity of the test results.
As it is a process test, chambers typically have a means of viewing and monitoring the testing procedure either through a viewing hole or through a video feed in order to record the progressive effects of the process. Test chambers can range from simple, smaller benchtop chambers that can be used to test a small component, to more complex walk-in chambers, and even drive-in chambers for vehicles and aircraft. As products, materials, and components are likely to come into contact with numerous different environmental conditions, environmental test chambers are often constructed with the ability to test a combination of environmental effects. Temperature and altitude are often combined with humidity testing because of the likelihood of the existence of these effects in nature.

Additional Reading

Humidity System—Types and the Concept of Relative Humidity

Among all the concepts related to environmental test chambers, inarguably the most complex and misunderstood concept is Relative Humidity (RH). With a range of climate chambers, such as thermal shock chambers, vacuum chambers, industrial ovens, salt spray chambers, cryogenic Chambers, and AGREE Chambers, available, it is necessary to understand the concept, which will help you to make informed decision. RH is not an independent entity, it is temperature specific. Let us look at an example to give better insight. The moisture in the air at 68°F and 50% RH is not the same as 50°F and 50% RH. As temperature rises, its ability to hold moisture is reduced. The thumb rule is: the lower the temperature of air, higher will be the RH of air, for a given amount of water vapor in the air. The RH and its limitations are important concepts because manufacturers use dew point to describe the RH limitation. If the limits set by the manufacturer are surpassed while the chamber is being operated, it can damage the refrigeration system. To achieve lower humidity levels down to 5% RH, you need refrigeration valves installed in the humidity system that allow the refrigerated coil to go below freezing point. Additionally, a dry air purge system can be fixed to maintain a positive pressure and sublimate the frost accumulated on the coil. Types of Humidity Systems: Commonly, three types of humidity systems are used in environmental chambers: boiler/steam generator, water bath or pan, and atomizing system. Boiler or steam generator This type of system is standard on almost all sub-zero chambers. Water Pan They are considered very stable; however, their response is slow. They can attain 98% of humidity and have larger capacity. However, the load of boiler can cause problems. Atomizing System These systems spray atom-sized drops of water into the air stream to increase humidity. It provides good control with live loads.

Humidity Chamber Informational Video

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