What is a Double 85 High Humidity Chamber and Why It Matters
A Double 85 High Humidity Chamber, often called an 85/85 Test Chamber, is a specialized environmental test device designed to maintain constant conditions of 85°C temperature and 85% relative humidity. This combination of high heat and moisture creates a challenging environment that accelerates the aging and corrosion process in materials and products. It’s widely used to simulate real-world harsh conditions where heat and humidity threaten product reliability and lifespan.
Understanding the 85°C/85% RH Test Standard
The 85°C/85% RH (relative humidity) standard is a widely recognized benchmark in reliability testing across industries. Often referred to as the “damp heat test” or “THB test,” it evaluates how well components withstand prolonged exposure to heat and humidity. By replicating these conditions, manufacturers can identify weaknesses and prevent failures in products before they reach the market.
Real-World Applications in Harsh Environments
This testing method is essential for products used in environments where moisture and heat are common, such as tropical climates or inside automotive engines. Electronics, semiconductors, automotive parts, solar panels, and batteries all undergo Double 85 testing to ensure they maintain performance under stress. The test helps verify product durability, safety, and compliance with international standards.
How Derui’s Chamber Outperforms Standard Models
Derui’s Double 85 High Humidity Chamber stands out by combining precision control, robust construction, and energy efficiency. Unlike standard models, our chambers offer:
- Superior uniformity in temperature and humidity distribution to ensure consistent testing conditions.
- Advanced controllers for easy programming and monitoring.
- Eco-friendly refrigerants that lower energy use without sacrificing performance.
- Durable materials built for long-term use in demanding environments.
With these advantages, Derui’s chambers deliver reliable, repeatable results that meet or exceed industry standards, making them a trusted choice for businesses focused on product quality and compliance.
Key Features of the Derui Double 85 Test Chamber
The Derui Double 85 high humidity chamber is built with features that make it stand out in reliability testing. Here’s what you get:
Precision Temperature and Humidity Control
- Stable Environment: Maintains a steady 85°C temperature with 85% relative humidity, perfect for damp heat testing.
- Fast Response: Quick adjustments mean your tests run smoothly without unexpected fluctuations.
- Uniform Conditions: Even airflow ensures consistent humidity and temperature throughout the chamber.
Durable Construction and Energy-Efficient Design
- Robust Build: Made with corrosion-resistant stainless steel interiors to handle constant high humidity.
- Insulated Walls: Keeps heat in and energy usage down, saving operational costs.
- Quiet Operation: Designed to minimize noise, making it suitable for lab or production floor use.
Advanced Controller for Seamless Programming
- User-Friendly Interface: Large touchscreen lets you set, monitor, and adjust test cycles easily.
- Customizable Programs: Run multiple test profiles with precise timing and ramp rates.
- Data Logging: Tracks key parameters for quality control and compliance documentation.
| Feature | Benefit |
|---|---|
| Precise Temp & Humidity Control | Reliable test conditions |
| Stainless Steel Interior | Long-lasting durability |
| Energy-Efficient Insulation | Lower utility costs |
| Advanced Programmable Controller | Easy operation & test repeatability |
Derui’s design balances top-notch performance with practical features, ensuring your 85/85 test chamber works hard and smart.
Technical Specifications and Performance Data
When it comes to Double 85 high humidity chambers, knowing the specs is key. Here’s a clear overview that helps you understand what to expect from our models.
Temperature and Humidity Ranges Explained
Our Double 85 test chambers are designed to maintain strict conditions to meet industry standards including:
| Parameter | Range |
|---|---|
| Temperature | Room temp to 85°C (185°F) |
| Humidity | Up to 85% RH (Relative Humidity) |
This combination replicates harsh damp heat environments, essential for accelerated aging and reliability testing.
Chamber Sizes, Power Requirements, and Safety
We offer various chamber sizes to fit from small electronics to larger automotive parts:
| Chamber Size (Cu. Ft.) | Typical Application |
|---|---|
| 1 – 10 | Small components, electronics |
| 10 – 30 | Mid-size assemblies, sensors |
| 30+ | Large automotive or PV modules |
Power specs align with U.S. standards:
- Voltage: 120V/240V options
- Frequency: 50/60 Hz
- Power Consumption: Energy-efficient design to reduce operating costs
All chambers come with built-in safety features:
- Over-temperature protection
- Humidity alarms
- Emergency shutdown procedures
Compliance with Industry Standards
Our Double 85 test chambers meet key testing protocols including:
- IEC 60068 – Environmental testing for equipment reliability
- ASTM standards – Reliable damp heat and aging tests
- Automotive standards – Ensuring component durability under humidity
This compliance means you can trust our chambers for your regulatory and quality assurance needs in electronics, automotive, and solar industries.
Applications Across Industries: From Electronics to Automotive

Electronics and Semiconductor Testing
Double 85 high humidity chambers are essential for testing the reliability of electronic devices and semiconductors. They simulate tough environmental conditions—85°C and 85% relative humidity—to identify potential failures before products hit the market. This helps manufacturers reduce warranty claims and improve product lifespans.
Automotive Component Reliability Under Damp Heat
In the automotive sector, components are regularly exposed to hot and humid conditions. Using an automotive 85/85 humidity tester, manufacturers can ensure parts like sensors, connectors, and plastics withstand damp heat without degrading. This kind of testing is crucial for safety and performance in today’s vehicles.
PV Module Qualification Per IEC 61215
Solar panels need to endure the elements for years. A PV module double 85 chamber replicates harsh weather conditions to verify durability according to IEC 61215 standards. It helps solar manufacturers qualify their modules by accelerating aging and damp heat effects, ensuring reliable energy production.
Emerging Uses in Batteries and Medical Devices
Beyond traditional sectors, double 85 test chambers are now vital for battery testing—especially in electric vehicles—and medical device qualification. These chambers stress-test batteries for heat and moisture tolerance and ensure medical equipment performs safely in demanding environments.
By tailoring 85/85 test conditions to diverse industries, Derui’s chambers support product quality and reliability across the board.
How to Choose the Right Double 85 Chamber for Your Needs
Picking the right Double 85 high humidity chamber depends mainly on your testing volume, specific conditions, and budget. Here’s a quick guide to help you decide:
Sizing Guide Based on Sample Volume
Choose a chamber size that fits your typical batch of samples without wasting energy or space. Here’s a simple breakdown:
| Sample Volume | Recommended Chamber Size |
|---|---|
| Small | 100 to 300 liters |
| Medium | 300 to 600 liters |
| Large | 600 liters and above |
Smaller chambers save power and space but may limit throughput. Larger chambers handle more samples but use more energy.
Customization Options for Testing
Depending on your needs, you might want:
- Low RH Settings: Some tests need less humidity. Custom controllers can lower RH below 85% without losing temperature accuracy.
- High-Throughput Testing: For faster results, chambers with quick recovery systems and multiple shelves help process many samples simultaneously.
Cost-Benefit: ROI on Accelerated Testing
Investing in a Double 85 test chamber pays off by catching product weaknesses early. Consider these points:
- Reduces costly recalls and warranty claims
- Shortens your product development cycle
- Improves overall product reliability
- Saves money by simulating years of wear in weeks
When you factor in faster time-to-market and better product quality, the ROI of a well-chosen 85/85 Test Chamber becomes clear.
If you’re unsure about sizing or features, talk with a Derui expert to get a tailored solution just right for your application.
Installation, Operation, and Maintenance Best Practices
Setting up your Double 85 high humidity chamber right is key to getting accurate, consistent results. Here’s a simple approach to ensure optimal performance:
Step-by-Step Setup for Uniform Testing
- Choose the right spot: Place the chamber on a level surface, away from direct sunlight and drafts.
- Power up safely: Confirm the electrical supply matches the chamber’s power specs.
- Load samples carefully: Arrange your test items with space between them to allow air circulation and maintain uniform humidity and temperature.
- Run a blank test: Before starting actual tests, let the chamber run empty for a couple of hours to stabilize conditions.
Routine Calibration and Humidification Care
- Regular calibration: Schedule temperature and humidity calibration at least twice a year to keep readings accurate.
- Check sensors: Inspect humidity and temperature sensors for dirt or damage and clean as needed.
- Maintain humidification: Use clean water to avoid mineral build-up in the humidifier. Replace filters regularly according to the manual.
Troubleshooting Common Issues Like Condensation
- Condensation inside the chamber often means humidity or temperature control is off. Double-check settings and sensor accuracy.
- Uneven temperature zones? Rearrange samples and check air circulation fans.
- Humidity fluctuation? Clean humidification components and inspect for leaks.
Following these practices helps keep your Double 85 test chamber running smoothly, delivering reliable, consistent 85/85 test results every time.
Why Partner with Derui for Your 85/85 Testing Needs
Choosing the right partner for your Double 85 high humidity chamber is crucial, and Derui stands out in the U.S. market for a few solid reasons.
Manufacturing Expertise and Global Certifications
Derui combines decades of experience with strict quality controls, ensuring every chamber meets or exceeds standards like IEC 60068 and ASTM. Our manufacturing process is ISO-certified, guaranteeing reliable, consistent performance for your 85/85 test chamber needs.
Customer Success Stories and Support Services
We take pride in supporting U.S. businesses across electronics, automotive, and renewable energy sectors. From initial setup to ongoing maintenance, our responsive support team helps you get the most out of your high-temperature high-humidity chamber. Many customers report faster test cycles and improved product reliability thanks to Derui chambers.
Sustainability Focus: Eco-Friendly Refrigerants and Low Energy Use
In today’s market, sustainability matters. Derui uses eco-friendly refrigerants that reduce environmental impact without sacrificing performance. Our energy-efficient designs also help lower operational costs, making your investment in a Double 85 test chamber not just smart for quality but also for green initiatives.
Partner with Derui and get trusted reliability, industry expertise, and a commitment to sustainability—all tailored for your U.S. product testing needs.
Ready to Enhance Your Product Reliability? Contact Derui Today
If you’re ready to boost your product’s reliability with top-notch Double 85 high humidity chambers, Derui is here to help. Whether you’re testing electronics, automotive parts, PV modules, or medical devices, our advanced 85/85 test chambers deliver consistent, accurate results that meet U.S. industry standards.
To ensure your products withstand real-world conditions, partner with Derui for a customized Environmental Test Chamber solution. We tailor our chambers to your specific testing volume, budget, and timeline. With Derui, you gain more than just a chamber; you get expert support, proven quality, and energy-efficient designs built for long-term reliability. Let’s work together to protect your products against harsh environments.
Contact Derui today to explore how our Environmental Test Chambers, including our specialized Double 85 models, can streamline your testing and give you confidence in your product's future.















