Can a Temperature and Humidity Aging Chamber Control Temperature and Humidity Simultaneously?

Modern products are no longer tested under single-factor conditions.

Electronics, batteries, automotive components, and photovoltaic modules must survive heat, cold, moisture, and rapid environmental changes at the same time. A test result is only meaningful if temperature and humidity are controlled together-accurately, continuously, and repeatably-under real operating conditions rather than ideal laboratory assumptions.

This is where many users hesitate: Can one chamber truly control temperature and humidity simultaneously without compromising stability over long test durations? The answer depends entirely on airflow design, sensor accuracy, control logic, and system integration. These factors must perform not only on paper, but also in daily laboratory operation. A Canadian testing laboratory currently operating a LIB chamber reports stable performance and smooth operation in routine testing since installation, confirming consistent control under combined temperature-humidity conditions.

LIB Temperature and Humidity Aging Chamber is engineered specifically to solve this challenge. By integrating precision PID control, high-efficiency airflow circulation, and industrial-grade components, LIB delivers stable, synchronized temperature and humidity control for both standard qualification tests and advanced accelerated aging evaluations. The result is reliable, repeatable environmental testing that laboratories and manufacturers can trust for long-term product validation.

A temperature and humidity aging chamber is a controlled environmental system designed to simultaneously regulate temperature and relative humidity within a sealed test space. Unlike basic thermal chambers, it supports constant temperature & humidity tests, temperature cycling, damp heat tests, and accelerated aging evaluations.

The LIB chamber operates across a wide temperature range from –70 °C to +150 °C and a humidity range of 20 % to 98 % RH, enabling true combined-stress testing rather than isolated conditions. This makes it suitable for both steady-state and dynamic environmental simulations.

Industries relying on this capability include electronics, lithium battery manufacturing, automotive components, photovoltaic modules, lighting materials, and industrial sensors. Typical applications include 85 °C / 85 % RH damp heat testing, high-low temperature aging, humidity freeze tests, and thermal cycling.

LIB chambers are designed to comply with major international standards, including IEC 60068-2-30, IEC 61960, IEC 62133, UL 2580, UL 1642, UL 1973, UL 2054, SAE J2929, SAE J2464, IEC 61215, SAE J2334, VW 80000, and IEC 62717, ensuring global acceptance of test results.

Temperature Humidity Chambers for aging test 

1. Small Benchtop Temperature Humidity Chamber

2. High-Precision Walk in Temperature Chamber

3. Temperature Explosion Proof Test Chamber

4. Durable Lab Vacuum Drying Oven

5. Energy-Efficient Battery Thermal Test Chamber

6. Programmable 2-Zone And 3-Zone Vertical Thermal Shock Test Chamber

Precise simultaneous control starts with uniform airflow. LIB chambers use top air supply and bottom air return, forming a vertical forced-convection circulation that continuously mixes temperature and humidity throughout the workroom.

Large-volume low-noise centrifugal fans are installed according to chamber size, ensuring consistent air velocity and eliminating hot or wet spots. This optimized airflow design keeps temperature deviation within ±2.0 °C across the entire workspace, even under high humidity conditions.

Accurate sensing is the second foundation. LIB integrates PT100 Class A temperature sensors with a resolution of ±0.001 °C, providing real-time feedback to the control system. Humidity is regulated through a closed-loop humidification system with precise water level detection and condensate recovery.

Control intelligence ties everything together. A PID touchscreen controller dynamically adjusts heating, cooling, humidification, and dehumidification outputs. Temperature fluctuation is maintained within ±0.5 °C, while humidity accuracy remains at ±2.5 % RH across the full operating range.

Finally, performance is supported by hardware reliability. TECUMSEH compressors enable stable cooling down to –70 °C at 1 °C/min, while chrome-nickel alloy heaters support heating up to 150 °C at 3 °C/min, ensuring fast response without overshoot.

Electronic product testing requires stable combined stress to reveal hidden failures. LIB temperature and humidity aging chambers are widely used for reliability verification, compliance testing, and accelerated life testing of electronic devices.

Step 1: Program Environmental Profiles
The test begins by defining temperature-humidity cycles using the 7-inch PID touchscreen controller, which supports 120 programs with 100 steps each. LIB's advantage lies in its ability to combine ramp, soak, and recovery stages into a single automated sequence, reducing setup errors and operator workload.

Step 2: Controlled Ramp-Up and Stabilization
Temperature is increased at 3 °C/min while humidity rises simultaneously to the target level, such as 85 °C / 85 % RH. LIB's optimized airflow and PID logic prevent condensation shock and maintain uniform conditions, ensuring compliance with IEC 60068-2-30 damp heat requirements.

Step 3: Long-Duration Aging Exposure
During extended exposure-often 500 to 1000 hours-the chamber maintains stable conditions with ±0.5 °C fluctuation and ±2.5 % RH accuracy. SUS304 stainless steel interiors resist corrosion under high humidity, a critical advantage for long-term electronic aging tests.

Step 4: Live Power and Monitoring
Through Φ50 mm sealed cable holes, powered testing is performed while maintaining airtightness. LIB's silicone-sealed test ports allow voltage monitoring, functional checks, and data acquisition without compromising chamber stability-essential for UL and IEC electronic safety standards.

Step 5: Data Logging and Reporting
Temperature and humidity data are logged continuously via Ethernet or USB, with one-click export for compliance documentation. LIB's system supports traceable reports required for UL 2580, IEC 62660-2, and automotive qualification audits.

Q1: How is the temperature sensor in a Temperature and Humidity Test Chamber calibrated?

A: Temperature calibration is carried out at the factory after the chamber assembly is completed. During calibration, nine temperature sensors are evenly distributed inside the working chamber to cover all critical measurement points. The temperature readings from all sensors are recorded and averaged, then compared with the preset reference value. If any deviation is detected, the chamber's hardware control parameters are adjusted to correct the difference. This process ensures uniform temperature distribution and accurate temperature display across the entire test space.

Q2: How is humidity calibrated in a Temperature and Humidity Test Chamber?

A: Humidity calibration is performed based on temperature calibration using the dry-bulb and wet-bulb comparison method. During the process, dry-bulb and wet-bulb temperatures are measured inside the chamber, and the corresponding humidity value is determined from standard psychrometric tables. The measured humidity is then compared with the reference value. If deviations are found, hardware parameters are adjusted until the humidity reaches the required accuracy. This ensures stable and reliable humidity control before delivery.

Q3: Does the Temperature and Humidity Test Chamber have audible and visual alarm functions?

A:The chamber is standardly equipped with an audible alarm to provide immediate alerts in case of abnormal conditions.
Visual alarm indicators are available as an optional configuration and can be added based on specific customer requirements.

Q4: Can the power connection cable be supplied with a plug instead of bare wires?

A: We recommend that customers prepare their own power plug. The chamber is delivered without a plug to prevent incorrect wiring in different laboratory environments and to ensure safe and reliable electrical installation.

Any customization can be made. LIB offers a 3-year warranty and lifetime service. Any issues that cannot be resolved during the warranty period will be replaced free of charge. 24/7 English-speaking after-sales team. Fast shipping within 7-15 days. With precise temperature-humidity synchronization, programmable automation, and compliance with global standards, LIB Temperature and Humidity Aging Chambers deliver reliable, repeatable environmental testing for modern product development.

Contact LIB Industry today to design a temperature and humidity aging chamber tailored to your testing standards and application requirements.