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An Altitudinal Chamber: What Is It?

Views: 278     Author: Kaylee     Publish Time: 2024-01-11      Origin: Site


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An Altitudinal Chamber: What Is It?

For military, industrial, and consumer applications where items or components need to work or be transported in low-pressure conditions or resist rapid decompression in conjunction with climate control, pressure or altitude testing is crucial. An altitude test chamber can be the answer you need if your products are subjected to extreme conditions or if you have to comply with military or aviation test standards, such as RTC DO-160 or MIL-STD-810.

What Are Altitude Chambers Used For First?

Industrial altitude chambers generate significantly more harsh and coupled conditions, including height, temperature, humidity, icing, and in some instances vibration, than hypobaric chambers, which are used to research the effects of high terrestrial altitude and hypoxia on human physiology. Your products can go through the qualification testing required to replicate real-world situations by merging multiple settings. Here are some things to think about before making an altitude chamber purchase.


The majority of altitude chambers can replicate ordinary vacuum conditions up to 100,000 feet by using vacuum pumps of different kinds and sizes, with longer ranges reaching 200,000 feet. Some altitude testing chambers can replicate rapid decompression by rapidly and dramatically dropping pressure in less than 15 seconds, simulating an abrupt loss of cabin pressure. Alternatively, altitude chambers can be pressured to replicate sub-sea or sub-site level altitude using compressed air or inert gas.

The Temperature

The majority of altitude chambers are made to simulate both temperature and altitude up to 65,000 feet using either single-stage or cascade refrigeration, enabling a broad variety of combined temperature and altitude profiles. Furthermore, altitude chambers with temperature ranges of -73°C (-100°F) to 180°C (356°F) can be used as temperature-only chambers in addition to their primary function.


When testing the robustness and endurance of numerous crucial flight components, the capacity to replicate ground-level humidity in combination with temperature and altitude in a cyclical profile is crucial. Temperature, humidity, and altitude control must be applied simultaneously in combined environment testing, such as in exceptional circumstances such as ICING TESTS. The majority of combined environment altitude chambers serve as both temperature and humidity chambers, with relative humidity (RH) ranges of 5% to 95% within the limits of a maximum dry bulb temperature of 85°C (185°F) and a minimum dewpoint temperature of 4°C (40°F).


Vibration compatibility with an electrodynamic or mechanical vibration system can integrate with temperature, humidity, and altitude chambers under certain conditions. Specialized qualification testing for avionics and aerospace equipment is needed for real-world applications.

High And Low Temperature Low-pressure Area Test Chamber

Industry Requirements For Chambers At An Altitude

There are countless altitude tests that can be customized for consumer goods and packaging, but there are two main sources of specifications and guidelines for military and aerospace applications. These sources are regularly updated to reflect protocol changes and improvements to guarantee that products meet the exacting standards of the industry.The following are PRIMARY INDUSTRY REQUIREMENTS that use altitude testing:

1. Mil-Std-810

In January 2019, the upgraded revision H—a replacement for MIL-STD-810G—was published by the US Department of Defense. All that a MIL-STD is is a series of standards and testing procedures designed to guarantee uniformity in military applications. While MIL-STD-810H includes a broad range of testing procedures, altitude and/or combined environment testing is expressly addressed by several of the "Methods" in the standard.

2. Do-160 Rtca

This international standard, known as the Environmental Conditions and Test Procedures for Airborne Equipment, was first created in 1958 and most recently revised in 2011 (DO-160G). The standard's goals are to illustrate how devices and equipment that are exposed to the kinds of environmental factors found in aircraft equipment work. RTCA DO-160G addresses a broad range of testing procedures, including numerous "Sections" that expressly target altitude and/or combined environment testing, much like MIL-STD-810H.

Although both standards allow for the customization of tests according to particular or unique goods as well as flight or mission profiles, test profiles are often designed in accordance with four primary procedural guidelines:

3. Stock

tests materials and/or packaging that is either integrated with or without environment testing and is transported or stored at high or low altitudes.

4. Function

assesses how well equipment or goods work in different environments, at different elevations, and with or without integrated testing.

5. Quick Breakdown

assesses the possible effects of fast depressurization on workers, goods, or equipment.

6. Transparent Decompression

Comparable to rapid decompression, but modeling immediate decompression, as in the case of a compromised pressurized airplane cockpit.

Additional Thoughts For Altitude Chambers

Temperature Humidity Low-pressure Area Test Chamber

There are a few more things to take into account when buying environmental test equipment for altitude chambers.

1. Dimensions Of The Chamber

What size unit under test (UUT) do you have? How much will you have to test at once? Are there any limitations on moving inside your facility or on the building infrastructure that need to be addressed in order to get the chamber to its final performance location?

2. Capacity For Heating And Cooling

What is the product's required temperature range? When tested, does your product produce any heat? How soon must the chamber be heated or cooled? Will you be able to do more testing in the future?

3. Elevation

What is your product's required altitude range? How soon must the altitude be changed for your testing? During altitude tests, does your product release gas or air into the chamber?

4. The Relative Humidity

What is the required testing range for your product in terms of humidity and temperature? Does altitude testing require humidity in addition to altitude? During testing, does your product release moisture or remove it from the chamber?

5. Merged Environment

Is it necessary to have dampness, icing, or vibration?The best altitude test chambers are made to your particular specifications through design and manufacturing. Our Application Engineers will be better able to meet your requirements in the now and the future if you can give them as much information as possible. Since no two altitude chambers are precisely the same, it is imperative that the manufacturer and customer work together early on in the development process.

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