In calibration laboratories, even a small environmental variation can affect measurement accuracy. A thermometer that reads 0.5°C higher than the actual temperature or a hygrometer that shows a 3% RH deviation can lead to incorrect test results, product failures, or non-compliance with quality standards. That's why precise environmental control is essential for instrument calibration.
This article explains what LIB Calibration Climatic Chamber is used for, how it works, how it achieves high-accuracy temperature and humidity control, and why laboratories worldwide rely on it for calibration and environmental testing applications.
Calibration Functions of a Calibration Climatic Chamber
Calibration of Thermometers and Hygrometers
The primary purpose of a Calibration Climatic Chamber is to provide stable environmental conditions for calibrating thermometers,
hygrometers, temperature sensors, humidity sensors, data loggers, and environmental monitoring devices.
The chamber generates controlled temperature and humidity conditions that can be compared with certified reference instruments. For example, a laboratory may set the chamber to 25°C and 50% RH to verify standard operating accuracy, 40°C and 85% RH for high-humidity verification, or 0°C to confirm low-temperature performance.
Industries using calibration chambers include:
• Metrology institutes
• Calibration laboratories
• Electronics manufacturers
• Pharmaceutical facilities
• Environmental monitoring organizations
• Quality inspection centers
How Does a Calibration Climatic Chamber Work?
A Calibration Climatic Chamber creates a controlled environment through a combination of heating, cooling, humidification, dehumidification, and airflow circulation systems.
The chamber uses a PT100 Class A temperature sensor and a capacitive humidity sensor to continuously monitor environmental conditions. The programmable controller compares real-time values with target settings and automatically adjusts heating, refrigeration, and humidity systems to maintain precise conditions.
The process follows four steps:
① Generate target temperature
② Generate target humidity
③ Continuously monitor conditions
④ Automatically correct deviations
This closed-loop control system ensures stable and repeatable calibration conditions for every test cycle.
How Does the LIB Calibration Climatic Chamber Maintain High Accuracy?
High calibration accuracy depends on sensor quality, airflow design, and control technology.
LIB Calibration Climatic Chambers utilize PT100 Class A temperature sensors and capacitive humidity probes to achieve highly accurate environmental control. Optimized airflow circulation distributes conditioned air evenly throughout the workspace, reducing temperature and humidity gradients.
Typical performance specifications include:
• Temperature Range: -40°C to +100°C
• Humidity Range: 20% to 98% RH
• Temperature Stability: ±0.3°C
• Temperature Fluctuation: ±0.5°C
• Humidity Accuracy: ±2% RH
• Humidity Deviation: ±2.5% RH
The chamber supports calibration activities in accordance with internationally recognized requirements including:
• ISO/IEC 17025 Calibration Laboratory Requirements
• IEC 60068 Environmental Testing Standards
• ASTM Environmental Test Standards
• JJF Calibration Specifications
• CNAS Laboratory Accreditation Requirements
These capabilities ensure traceable and repeatable calibration results.
Measurement Canada Purchased Calibration Climatic Chambers Twice
A leading Canadian calibration organization, Measurement Canada, required highly accurate calibration environmental chambers for instrument verification and performance testing.
First Purchase: Two Reach-In Calibration Climatic Chambers
The customer initially purchased two reach-in Calibration Climatic Chambers to calibrate thermometers, hygrometers, environmental
sensors, and data loggers.
The chambers provided:
① High temperature and humidity stability
② Easy sample loading and unloading
③ Quiet operation below 65 dBA
④ Automated calibration programs
The customer reported excellent measurement repeatability and improved calibration efficiency compared with previous equipment.
Second Purchase: Customized Walk-In Calibration Climatic Chamber
Following successful operation of the reach-in units, the customer later ordered a customized Walk-In Calibration Climatic Chamber.
The larger chamber was used for:
① Batch calibration of multiple instruments
② Large-scale environmental testing
③ Sensor performance verification
④ Temperature and humidity validation studies
The walk-in design allowed technicians to enter the chamber and install large quantities of instruments simultaneously, greatly improving productivity.
Why Measurement Canada Chose LIB Again
Several advantages contributed to the repeat purchase:
Excellent Temperature and Humidity Accuracy
One of the main reasons Measurement Canada chose LIB again was the chamber's outstanding environmental control performance. The Calibration Climatic Chamber maintains highly stable temperature and humidity conditions with excellent uniformity throughout the workspace, ensuring accurate and repeatable calibration results for thermometers, hygrometers, and environmental sensors.
Compliance with International Standards
Measurement Canada also valued the chamber's ability to support calibration activities in accordance with internationally recognized requirements. The equipment is manufactured to meet CE safety requirements and supports laboratory operations aligned with ISO/IEC 17025, IEC 60068 environmental testing standards, CSA laboratory practices, and modern calibration quality systems.
Reliable Safety Protection
Safety is essential in daily laboratory operation. LIB's Calibration Climatic Chamber incorporates multiple protection mechanisms to safeguard both personnel and equipment. These include over-temperature protection, refrigeration system protection, humidifier dry-burn protection, water shortage protection, leakage protection, and over-current protection, helping ensure stable operation during long-term testing and calibration programs.
Outstanding Cost Performance
Compared with many imported calibration chambers, LIB provided a highly competitive solution without compromising accuracy or reliability. The customer achieved professional calibration performance while reducing equipment investment and long-term operating costs, resulting in a better overall return on investment.
Easy Operation and Convenient Sample Handling
The customer appreciated the chamber's user-friendly design and convenient access to test samples. The optimized workspace layout allows thermometers, hygrometers, data loggers, and sensors to be placed and removed efficiently. Combined with the programmable touchscreen controller, daily calibration work becomes faster and easier for laboratory technicians.
Comprehensive After-Sales Support
Long-term service support was another important factor behind the repeat purchase. LIB provides a 3-year warranty and lifetime technical support for all Calibration Climatic Chambers. In addition, customers benefit from spare parts service, remote diagnostics, installation guidance, and operator training, ensuring reliable operation throughout the equipment's service life.
Proven Reliability and Customer Satisfaction
After successfully operating the first two reach-in Calibration Climatic Chambers, Measurement Canada gained confidence in the equipment's performance, stability, and reliability. This positive experience ultimately led to the purchase of a customized walk-in Calibration Climatic Chamber, further strengthening the long-term partnership between Measurement Canada and LIB.
LIB Reach-In Calibration Climatic Chamber vs Walk-In Calibration Climatic Chamber
Both chamber types can perform calibration and environmental testing, but they serve different laboratory requirements.
| Comparison Item |
|
|
|---|---|---|
| Appearance | Compact cabinet structure | Room-sized testing space |
| Capacity | 50L to 1000L | Customized large volume |
| Installation Area | Small laboratory footprint | Dedicated room space |
| Operator Access | Load samples through door | Personnel can enter chamber |
| Calibration Quantity | Small to medium batches | Large-scale batch calibration |
| Temperature Range | -40°C to +150°C | -70°C to +150°C |
| Humidity Range | 20% to 98% RH | 20% to 98% RH |
| Applications | Sensors, thermometers, hygrometers | Large instruments, mass calibration |
| Cost | Lower investment | Higher investment |
| Customization | Moderate | Extensive |
How to Choose the Right Calibration Climatic Chamber?
|
Choose a Reach-In Calibration Climatic Chamber when: • Laboratory space is limited • Calibration volume is moderate • Thermometers and hygrometers are the primary test items • Lower investment cost is preferred |
Choose a Walk-In Calibration Climatic Chamber when: • Large quantities of instruments require calibration • Large equipment must be tested • Environmental simulation and calibration are both required • Future expansion capacity is important |
LIB Popular Calibration and Climatic Chamber
Space-Saving Laboratory Design, Precise Temperature and Humidity Control
Versatile Testing for Multiple Industries, Stable and Uniform Environmental Conditions
Easy Access for Large Test Specimens, High-Capacity Environmental Simulation
Combined Climatic and Vibration Testing, Reduced Testing Time and Improved Correlation
Up to 20°C/min Temperature Ramp Rates, Accelerated Product Reliability Validation.
FAQs on the Calibration Climatic Chamber
q1: What instruments can be calibrated?
Thermometers, hygrometers, temperature sensors, humidity sensors, data loggers, environmental monitoring instruments, and other measurement devices.
q2: What standards does the chamber support?
The chamber supports calibration activities related to ISO/IEC 17025, IEC 60068, ASTM environmental testing standards, CNAS accreditation requirements, and various metrology regulations.
q3: Can multiple instruments be calibrated simultaneously?
Yes. Multiple devices can be calibrated at the same time provided airflow circulation is not obstructed.
q4: Can chamber size be customized?
Yes. LIB provides both standard reach-in models and fully customized walk-in calibration chambers.
q5: How is the chamber transported?
Reach-in chambers are shipped in export-grade wooden crates. Walk-in chambers are delivered as modular sections for easy transportation and on-site assembly.
q6: Is overseas installation available?
Yes. LIB provides remote technical guidance and on-site installation support worldwide.
q7: What warranty is included?
All Calibration Climatic Chambers include a 3-year warranty and lifetime technical support.
q8: Can the chamber also perform temperature and humidity testing?
Yes. In addition to calibration work, the chamber can be used for environmental simulation, product reliability testing, stability testing, and performance verification.
Download LIB's comprehensive technical guide to learn more about precision temperature and humidity calibration, environmental testing best practices, and real-world laboratory applications.
Contact LIB Industry today for a customized Calibration Climatic Chamber solution tailored to your laboratory requirements.
