Designed to maintain highly stable humidity conditions, it supports relative humidity ranges from 20% to 98% RH and temperature ranges from -70/-40/-20°C to +150°C, with ±2.5% RH stability and ±0.5℃ temperature uniformity.
With internal volumes 50L, 80L, it is ideal for testing electronics, pharmaceuticals, food, and advanced materials. The compact environmental chamber features an intelligent humidification system, enabling rapid humidity adjustment, precise control, and minimal condensation. The integrated PID controller with programmable segments and data logging ensures compliance with IEC 60068-2-78, ASTM D2247, and MIL-STD-810H humidity procedures.
Core Advantages of Compact Constant Relative Humidity Environmental Chamber
Wide Humidity & Temperature Range
Supports 20–98% RH and -70 ~ +60°C, allowing simulation of extreme moisture conditions and accelerated aging tests.
High-Speed Humidity Adjustment
Humidifiers deliver up to 5% RH/min increase, while efficient dehumidifiers reduce RH quickly, enabling rapid stabilization.
Compact Yet High-Capacity Design
Internal volume 50L,80L with adjustable/removable shelves supporting up to50 kg per layer, maximizing sample throughput in a small footprint.
Intelligent Control & Data Management
7-inch color touchscreen with up to 120 programmable steps, real-time RH/temperature curves, alarms, and USB/Ethernet export for full traceability.
Energy Efficiency & Quiet Operation
Low-noise compressors and fans maintain conditions with ≤65 dB, consuming less energy than conventional vertical humidity environmental chambers.
Safety and Reliability
Equipped with water-level sensors, dry-run protection, over-humidity and over-temperature alarms, and emergency stop, ensuring safe long-duration operation.
Intelligent Fault Monitoring
Integrated sensors monitor RH, temperature, and water supply, triggering alarms and automatic adjustments for safe operation.
What Are the Technical Specifications You Need to Know?
|
Model |
TH-50 |
TH-80 |
|
Internal Dimension (mm) |
320*350*450 |
400*400*500 |
|
Overall Dimension (mm) |
820*1160*950 |
900*1210*1000 |
|
Interior Volume |
50L |
80L |
|
Heat load |
1000W |
|
|
Temperature Range |
A : -20℃ ~ +150 ℃ B : -40℃ ~ +150 ℃ C: -70℃ ~ +150 ℃ |
|
|
Temperature Fluctuation |
± 0.5 ℃ |
|
|
Temperature Deviation |
± 2.0 ℃ |
|
|
Humidity Range |
20% ~ 98% RH |
|
|
Humidity Deviation |
± 2.5% RH |
|
|
Cooling Rate |
1 ℃ / min |
|
|
Heating Rate |
3 ℃ / min |
|
Compact Constant Relative Humidity Environmental Chamber – Detailed Features
Durable & Clean Workspace – Reliable Interior for Long-Term Testing
SUS304 stainless steel interior is corrosion-resistant and easy to clean. 2 adjustable/removable shelves support up to 50 kg per layer,more samples layers can also be customized.

Advanced Humidity Management – Large-Capacity & Flexible Water System
High-performance steam humidifiers enable rapid RH adjustments. Large-capacity water tank reduces refill frequency, and manual refill ensures uninterrupted operation. Built-in water-level detection prevents dry-run and overfill.

Optimized Airflow Design – Uniform Conditions for Every Sample
Multi-directional circulation maintains ±2.5% RH and 0.5℃ uniformity. Vertical and horizontal fans, combined with a baffle system, prevent localized condensation or hot spots. Rapid recovery restores conditions within 10–15 minutes after door opening.

Sample Access & Observation – Flexible Test Ports
Standard test ports (Φ50mm) allow cables or probes without disturbing conditions. Optional multi-port configurations support simultaneous monitoring of multiple samples. Observation window with anti-condensation heating ensures clear sample visibility.

Smart Control & Data Management – Intuitive Touchscreen HMI
7-inch touchscreen supports 120 programmable segments. Real-time RH/temperature curves, USB/Ethernet export, and alarms for water, humidity, or temperature deviations. Optional remote monitoring available.

Quick Reference – Compact Constant Relative Humidity Environmental Chamber FAQs
Q1: Can the compact environmental chamber maintain precise RH over long-term tests?
A1: Yes. Advanced PID control, dual-humidification, and intelligent airflow maintain ±2.5% RH over continuous multi-day operation.
Q2: How flexible is the sample loading?
A2: Shelves are adjustable, removable, and support 50 kg per layer. Multi-layer customization allows diverse product testing.
Q3: What after-sales support is offered by LIB industry?
A3: 3-year warranty, lifetime service, rapid response within 1–3 hours, and full customization support for specific testing requirements.
Achieve Reliable Humidity Testing By Compact Constant Relative Humidity Environmental Chamber
For pharmaceuticals, electronics, advanced materials, and precision components, accurate relative humidity control is essential. The Compact Constant Relative Humidity Environmental Chamber delivers precision, speed, and repeatability in a compact benchtop design.
Contact LIB industry today at sales@libtestchamber.com for custom configurations, detailed specifications, and expert technical support within 1–3 hours.
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