Programmable Temp and Humidity Test Chamber | GDJS-408L
Programmable Temp and Humidity Test Chamber | GDJS-408L
The ITM-LAB GDJS-408L (408L) is a high-capacity environmental chamber engineered for rigorous reliability testing across the electronics, semiconductor, and automotive sectors. Available in three temperature configurations (down to -20°C, -40°C, or -70°C) with an advanced humidity system, it is powered by premium French Tecumseh compressors to deliver rock-solid stability for continuous, long-term climate simulation.
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408 L Test Capacity | −40°C / −70°C Options | Programmable Environmental Testing
The ITM-LAB GDJS-408L is a 408 L temperature and humidity test chamber for evaluating how electronic components, automotive parts and industrial materials respond to controlled environmental conditions.
Available with a minimum temperature of −40°C or −70°C, the chamber supports high- and low-temperature exposure, steady-state damp heat and programmed environmental cycles. A touchscreen controller provides test programming, temperature and humidity monitoring, and data recording.
Built Around the Test, Not Just the Temperature Range
A temperature and humidity chamber needs to do more than reach the required setpoint. The specimen must fit comfortably inside the workspace, air must circulate around it, and the programmed conditions must remain within the chamber's operating limits.
The GDJS-408L is intended for laboratories that need a mid-sized environmental test space without moving to a larger walk-in system. Its 408 L capacity accommodates a range of components and assemblies, with space for specimen positioning and supporting fixtures.
Two configurations are available: theGDJS-408L-B, rated from −40°C to +150°C, and the GDJS-408L-C, rated from −70°C to +150°C. Both provide temperature and humidity control, with humidity operation limited to the specified temperature–humidity envelope.
For laboratories working with IEC 60068 test procedures, the choice between the B and C versions should begin with the required low-temperature condition, followed by specimen size, loading and test duration.
At a Glance
Specification
GDJS-408L
Test Volume
408 L
Low-Temperature Options
−40°C or −70°C
Maximum Temperature
+150°C
Temperature Fluctuation
±0.5°C
Humidity Range
20–98% RH, within the operating envelope
Controller
Programmable touchscreen
Data Export
USB / CSV
Power Supply
AC 380 V, 7.5 kW
A 408 L Workspace for Real Test Specimens
The GDJS-408L provides a 600 × 800 × 850 mm internal workspace, designed to accommodate test specimens, fixtures, sample racks and electrical connections. When planning the test arrangement, sufficient clearance should be maintained for air circulation, particularly when testing multiple specimens or powered electronic assemblies.
Before selecting the chamber, consider the complete specimen dimensions, total loading and heat generated during operation. Published chamber performance is based on no-load conditions, so temperature and humidity performance under actual loading should be reviewed according to the intended test setup.
Temperature and Humidity Performance
The GDJS-408L provides controlled temperature and humidity exposure for laboratory environmental testing. However, the temperature range and humidity range should not be interpreted as two independent limits that can be combined at any setpoint.
The chamber's humidity capability is defined by a temperature–humidity operating envelope. For example, the technical specification identifies operating points including 20°C/98% RH, 60°C/20% RH and 85°C/85% RH.
When planning a damp heat test, confirm that the complete temperature and humidity profile falls within the supported operating area.
Technical Specifications
Parameter
Specification
Model
GDJS-408L-B / GDJS-408L-C
Effective Volume
408 L
Internal Dimensions
600 × 800 × 850 mm
External Dimensions
800 × 1700 × 2020 mm
Temperature Range — B
−40°C to +150°C
Temperature Range — C
−70°C to +150°C
Temperature Fluctuation
±0.5°C
Temperature Uniformity
≤2.0°C
Temperature Deviation
≤±1°C
Humidity Range
20–98% RH
Humidity Fluctuation
±1% RH
Humidity Deviation
±3% RH
Average Heating Rate
≥3°C/min
Average Cooling Rate
≥1°C/min
Heating/Cooling Overshoot
≤2°C
Noise Level
≤70 dB(A)
Power Supply
AC 380 V
Rated Power
7.5 kW
Approximate Weight
400 kg
Programmable Testing and Data Recording
The GDJS-408L features a 7-inch TFT touchscreen controller supporting fixed-setpoint operation and multi-step temperature and humidity test programs. Operators can configure repeatable environmental profiles, monitor test conditions in real time and review historical temperature and humidity curves.
For test documentation and analysis, recorded data can be exported in CSV format via the standard USB interface. Optional RS-232 and Ethernet communication interfaces are available for integration requirements, while scheduled startup and fault indication functions support routine laboratory operation.
Typical Test Applications
The GDJS-408L is suitable for product development, quality control and environmental reliability evaluation where controlled temperature or humidity exposure is required.
Application
What Engineers Evaluate
Electronic Components
Functional stability after high/low-temperature or humidity exposure
Automotive Parts
Environmental resistance of electronic modules, connectors and assemblies
Electrical Equipment
Moisture-related insulation degradation and thermal performance
Plastics & Rubber
Material changes after controlled environmental conditioning
Industrial Assemblies
Product performance after programmed temperature cycles
Research Laboratories
Repeatable specimen conditioning and environmental exposure
Relevant Environmental Test Standards
The chamber can provide environmental conditions used in the following IEC 60068 procedures, subject to the required profile and equipment configuration.
Standard
Test Procedure
IEC 60068-2-1
Cold
IEC 60068-2-2
Dry Heat
IEC 60068-2-30
Damp Heat, Cyclic
IEC 60068-2-78
Damp Heat, Steady State
The applicable standard edition, exposure duration, specimen arrangement and acceptance criteria should be established before testing.
Chamber Construction and Practical Features
The GDJS-408L features a SUS304 stainless-steel interior, powder-coated steel exterior, insulated cabinet and silicone door seal for reliable daily laboratory operation. A three-layer observation window with electric heating helps reduce frosting and condensation, while integrated LED lighting allows operators to monitor specimens during testing.
The chamber comes with two sample racks and a left-side test port for routing cables to external equipment, with 50 mm and 100 mm port options listed in the specification. Optional glove ports and communication interfaces can be configured according to specific testing requirements.
Equipment Protection
The GDJS-408L includes protective functions for abnormal temperature conditions, compressor operation, circulating fans and electrical faults.
An independent specimen overtemperature protector is also listed in the technical specification.
These protections do not replace a specimen-specific safety assessment. The materials being tested and any electrical loads inside the chamber must be reviewed before operation.
Installation Requirements | Confirm the Laboratory Space Before Delivery
The GDJS-408L requires a suitable electrical supply and adequate clearance for ventilation and maintenance.
Item
Requirement
Ambient Operating Temperature
+5°C to +35°C
Ambient Relative Humidity
≤85% RH
Atmospheric Pressure
80–106 kPa
Electrical Supply
AC 380 V, 7.5 kW
Frequency
50 Hz ±0.5 Hz; 60 Hz supported
Side and Rear Clearance
600 mm
Installation Environment
Free from strong vibration, excessive dust and strong electromagnetic interference
The equipment should not be used to test or store flammable, explosive, volatile or corrosive substances without a specifically approved configuration.
For international orders, confirm the available electrical supply, access route and final installation arrangement before shipment.
Manufactured by ITM-LAB
ITM-LAB manufactures environmental testing equipment for industrial laboratories, product development teams and quality-control applications.
The GDJS-408L can be reviewed against the customer's actual test requirements, including specimen size, temperature and humidity profile, test duration and external connection needs.
Where a standard configuration is not suitable, the engineering team can evaluate the available equipment options before quotation.
Request a GDJS-408L Configuration & Quotation
Tell us what you need to test. We'll help you select the appropriate chamber configuration.
Share your specimen details, environmental test profile and installation requirements with ITM-LAB. Our team can review the application and prepare a suitable equipment configuration and quotation.
Should I choose the −40°C or −70°C version?
Start with the lowest temperature required by your test procedure. The GDJS-408L-B covers −40°C to +150°C, while the GDJS-408L-C extends the lower limit to −70°C. There is no need to select the lower-temperature configuration unless the application requires it.
Can the chamber maintain 85°C/85% RH?
The manufacturer's technical specification lists 85°C/85% RH as an operating point. The complete test duration, specimen loading and any additional requirements should still be reviewed before confirming the application.
Can multiple specimens be tested together?
Yes, provided the combined specimen arrangement fits the chamber and allows adequate air circulation. Loading can affect actual environmental performance, so the test arrangement should be considered during selection.
Can test data be exported?
Yes. The specified controller supports recording of temperature and humidity curves and exporting historical data in CSV format.
What information is needed for a quotation?
The most useful details are the DUT dimensions and weight, required temperature and humidity conditions, test standard, exposure duration, electrical supply and any special fixtures or connections.
