Stability ENVIRONMENTAL TEST Chambers
Long-term stability testing under tightly controlled environmental conditions.
Browse LH SeriesEnvironmental Test Chambers For Stability Testing
Stability test chambers are essential for industries that require consistent, long-term testing conditions—such as pharmaceuticals, consumer products, cosmetics, medical devices, biotechnology and more. Stability chambers are designed to maintain tightly controlled temperature and humidity environments over extended periods to evaluate product shelf life, packaging integrity, and regulatory compliance.
Associated Environmental Systems (AES) designs and manufactures high-performance stability chambers that deliver the accuracy, uniformity, and durability your testing demands. Whether you're performing ICH guideline-compliant pharmaceutical stability testing or monitoring cosmetic product degradation over time, our chambers provide the reliable environmental conditions you need. Backed by decades of engineering expertise, AES chambers are trusted for critical R&D, quality assurance, and compliance testing.
What is the Price of a Stability Chamber?

Stability chamber pricing typically starts around $18,000 for a standard model without additional features. The final cost depends on several key factors—most notably, the chamber’s size, performance specs, and whether it's built for steady-state conditions or more complex cycling profiles. This price can increase based on workspace volume, tighter control tolerances, faster change rates, and add-ons like dry air purges or desiccant air dryers.
To get the best fit, work directly with a manufacturer who can tailor a solution to your specific testing requirements and budget.
LH Series for stability testing
AES has developed it's LH series specifically for steady-state testing.
LH-1.5
1.37 Cubic Feet
Temperature Range: -20°C to +94°C (-4°F to +201.2°F).
Humidity Range: 10% to 95% (98% with added option).
Benchtop Model: Optional double stack available
Remote Monitoring: AESONE CONNECT® included with purchase
LH-6
5 Cubic Feet
Temperature Range: -20°C to +94°C (-4°F to +201.2°F).
Humidity Range: 10% to 95% (98% with added option).
Reach-in Model: Floor stand included in purchase
Remote Monitoring: AESONE CONNECT® included with purchase
Industries That Rely on Stability Chambers
Stability chambers play a vital role in product development, regulatory compliance, and long-term performance testing across a wide range of industries. These chambers provide precise control over temperature and humidity to simulate real-world storage and use conditions—helping manufacturers ensure consistency, safety, and reliability over time.
Explore how stability testing supports critical industries:
-
Pharmaceuticals: Conduct ICH stability testing to ensure product integrity, potency, and shelf life under tightly controlled conditions.
-
Medical Devices: Validate the performance and durability of medical devices in various environmental conditions, from packaging to real-world storage.
-
Consumer Goods: Assess packaging durability, product stability, and shelf life in fluctuating temperature and humidity environments including cosmetics, personal care items and everyday items.
- Biotech & Life Sciences: Maintain consistent environmental conditions for sensitive materials and ensure compliance with global regulatory standards.
Want to learn how stability chambers can support your specific application? Explore the industries we serve and discover how our solutions align with your testing goals.
Controlling Relative Humidity
AES uses vapor generator systems to give you precise control over the humidity conditions of your chambers’ internal workspaces. The vapor generator system is a closed stainless steel or copper tube. An element heats a constant water source creating vapor or steam that travels through the tube and mixes with conditioned air in a plenum before moving into the workspace. Notably, this water source must be treated and demineralized to avoid contaminating the test.
This system yields a standard relative humidity (RH) range between 10% and 98%.
Optional Features to Increase Humidity Range
High Humidity Sensors let you measure humidity as high as 98% RH.
Dry Air Purge Through Desiccant Air Dryers can achieve humidity as low as 5% RH. It compresses air through a desiccant system, absorbing the moisture before it moves into the workspace.
Dry Nitrogen Purges prevent condensation and frost from accumulating on DUT surfaces at colder temperatures by forcing out the moisture-heavy air. This also prevents the oxidation of metals at high temperatures.
Recirculating Desiccant Air Dryers are a more feasible option for larger chambers. Air is circulated through a desiccant system and then returned to the chamber, often cycled through a honeycomb wheel that releases captured moisture into the external workspace.
Associated Environmental Systems has developed a Dew Point Calculator to help you determine whether you'll need optional features for your humidity systems.
Remote Monitoring With AESONE CONNECT®

Our LH Series come standard with AESONE CONNECT®, allowing you to monitor and manage tests remotely. Access real-time and historical data, start or stop test profiles, and adjust settings—all from any web browser.
AESONE CONNECT® features an intuitive dashboard with interactive graphs, customizable data views, and secure multi-user access with permission controls.
Already have an environmental test chamber? AESONE CONNECT® can be retrofitted to most models, extending its functionality and lifespan well beyond a decade.
Stability Chamber Maintenance: Why It Matters

Regular maintenance is essential to keeping your stability chambers running reliably for 10 years or more. This is especially true for chambers with humidity control, which rely on properly conditioned water to operate effectively. Without regular upkeep, issues like sediment buildup, stagnant water, or microbial growth (such as mold or mildew) can occur—leading to corrosion, performance drift, or even system failure.
That’s why AES offers nationwide support from experienced service technicians who are trained to keep your chambers in top condition. From preventative maintenance and calibration to troubleshooting and repairs, we’re here to help you maximize uptime and extend the life of your investment.
Frequently Asked Questions
What is a stability chamber?
A stability chamber is a type of environmental test chamber designed to maintain precise temperature and humidity conditions for extended periods. These chambers are used to test how products hold up under long-term storage or transport conditions.
Read More on Stability Chambers
What are stability chambers commonly used for?
Stability chambers are commonly used in pharmaceutical, medical device, cosmetic, and food industries to perform stability testing. They help ensure product safety, shelf life, and regulatory compliance by simulating controlled environmental conditions.
Read more on why LH series are valuable for Industries
Humidity chambers: Calculating dew point to fit your testing.
The relationship between temperature, relative humidity, and dew point can be a bit complicated to calculate, but it’s vital for ensuring reliable and consistent humidity testing. Read more on Calculating Dew Point.