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Product Overview
The GDJS-408L Constant Temperature & Humidity Test Chamber is designed for reliable environmental simulation testing under controlled temperature and humidity conditions.
Featuring programmable temperature and humidity control, the chamber is ideal for conducting constant temperature tests, constant humidity tests, damp heat tests, high and low temperature tests, temperature cycling tests, and environmental aging tests. It is widely used for product reliability verification in accordance with environmental testing procedures defined by IEC 60068, MIL-STD-810, ISO 16750, and other international or industry-specific standards.
Key Features
1.Wide Temperature Range
-20°C / -40°C / -70°C to +150°C
2.Precise Temperature & Humidity Control
- ±0.5°C Temperature Accuracy
- 20–98% RH
- Stable testing environment
3.Fast Heating & Cooling
Heating and cooling performance reduces testing cycle time.
4.Durable Chamber Construction
- SUS304 Interior
- Corrosion Resistant
- High Density Insulation
5.Reliable Refrigeration System
International-brand hermetic piston compressor for stable low-temperature performance.
6.Intelligent Programmable Controller
Easy operation with programmable testing profiles.
Applications
Suitable for environmental testing in:
Supported Test Types
The GDJS-408L Constant Temperature & Humidity Test Chamber is designed to perform a variety of environmental simulation tests for product reliability evaluation. Typical test types include:
| Test Type |
Typical Test Procedure |
Purpose |
| Constant Temperature Test |
Samples are maintained at a fixed high or low temperature for a specified duration to evaluate performance stability. |
Verifies product operation and material stability under constant thermal conditions. |
| Constant Humidity Test |
Products are exposed to a stable humidity environment (typically 20–98% RH) at a constant temperature. |
Evaluates moisture resistance, insulation performance, and corrosion susceptibility. |
| Constant Temperature & Humidity Test |
Temperature and humidity are controlled simultaneously for continuous exposure over a defined period. |
Simulates long-term storage or operating environments to assess overall reliability. |
| High Temperature Test |
The chamber is heated to a specified temperature (up to +150°C), where samples remain for several hours or days. |
Determines heat resistance, thermal aging characteristics, and operational reliability. |
| Low Temperature Test |
Samples are exposed to temperatures as low as -70°C and maintained for a specified period before inspection or functional testing. |
Evaluates cold resistance, startup performance, and material toughness. |
| Damp Heat Test |
High temperature and high humidity conditions (e.g., 85°C/85% RH) are maintained continuously for extended periods. |
Assesses resistance to moisture penetration, corrosion, insulation degradation, and sealing performance. |
| Temperature Cycling Test |
The chamber automatically alternates between high and low temperatures according to a programmed cycle. |
Detects failures caused by thermal expansion and contraction, such as cracks, solder fatigue, or seal failure. |
| Environmental Aging Test |
Products undergo prolonged exposure to elevated temperature and humidity under controlled conditions. |
Accelerates material aging to predict long-term service life and durability. |
| Reliability Test |
Customized environmental profiles combine temperature, humidity, and cycling conditions based on product requirements. |
Validates product reliability before production, certification, or shipment. |
Applicable Environmental Test Standards
| Standard |
Typical Test |
| IEC 60068-2-1 |
Cold Test |
| IEC 60068-2-2 |
Dry Heat Test |
| IEC 60068-2-30 |
Cyclic Damp Heat Test |
| IEC 60068-2-38 |
Temperature/Humidity Combined Cycle |
| IEC 60068-2-78 |
Constant Damp Heat Test |
| MIL-STD-810 |
Environmental Engineering Tests |
| ISO 16750 |
Road Vehicle Environmental Testing |
| GB/T 2423 Series |
Environmental Testing for Electrical and Electronic Products |
Note: The GDJS-408L is capable of performing test procedures referenced in the above standards. Actual test conditions and compliance depend on the selected program, specimen configuration, and applicable industry requirements.
Technical Specifications Matrix
| Product Parameter |
Details & Verified Specifications |
| Model |
GDJS-408L |
| Inner Box Size (W×H×D) |
600 × 850 × 800 mm |
| Outer Box Size (W×H×D) |
1100 × 1750 × 1400 mm |
| Temperature Range |
a: -20°C ~ +150°C
b: -40°C ~ +150°C
c: -70°C ~ +150°C
|
| Humidity Range |
20% RH ~ 98% RH |
| Temperature Accuracy |
±0.5°C |
| Humidity Accuracy |
±3% RH |
| Temperature and Humidity Uniformity |
≤ ±0.5°C / ≤ ±5% RH |
| Temperature Rise Time |
• -20°C → +100°C: about 35 min
• -40°C → +100°C: about 45 min
• -70°C → +100°C: about 60 min
|
| Cooling Time |
• +20°C → -20°C: about 40 min
• +20°C → -40°C: about 55 min
• +20°C → -70°C: about 90 min
|
| Power Supply |
AC 380V, 7.5 KW |
| Weight |
About 400 kg |
Structure and Materials
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Inner Box Material: SUS304# Mirror stainless steel plate
-
Outer Box Material: Matte brushed stainless steel plate OR high-strength cold-rolled steel plate with double-sided electrostatic powder spraying baking paint
-
Insulation Material: Hard foam + glass fiber
-
Refrigeration System: France Taikang (Tecumseh) hermetic piston compressor
Standard Configuration
-
Observation Window: 1 (Double hollow tempered glass)
-
Test Hole: 1 × 50mm diameter port (located on the left side)
-
Sample Rack: 2 layers
-
Chamber Lighting: 1 box lighting assembly
-
Water Supply System: 1 water supply tank
-
Consumables: 1 bag of yarn
-
Power Supply Cord: 1 power cord
Comprehensive Safety Devices
-
No fuse switch
-
Anti-dry burning device
-
Compressor overpressure, overheating, and overcurrent protection
-
Over-temperature protection
-
Fan overload protection
-
Water shortage protection
-
Emergency stop and other essential protective devices
