How accurate is the temperature and humidity control in a Controlled Rh 100 Laboratory Climate Chamber?

If a single degree or a few percentage points of humidity can decide whether a product passes or fails certification, the chamber generating those conditions needs to be trustworthy down to the decimal point. Engineers running stability studies, material aging tests, or electronics qualification cannot afford drift, hot spots, or inconsistent humidity recovery after door openings-every deviation risks invalid data and repeated test cycles.

This article explains what LIB Industry Controlled Rh 100 Laboratory Climate Chamber is, the standards and working principles behind its accuracy, how it is tested, and how it compares to walk-in chambers-so you can judge whether its precision matches your application.

What It Is
A Controlled Rh 100 Laboratory Climate Chamber is a benchtop or upright environmental chamber engineered to sustain relative humidity up to 100% alongside a broad temperature range, typically from –20°C to +100°C. It is built for laboratories that need saturated or near-saturated humidity conditions-such as condensation testing, biological sample storage, or accelerated corrosion studies-where standard chambers capped at 95% RH fall short. Internal volumes generally range from 100 L to 800 L, making it suitable for benchtop research while still accommodating multiple test samples per run.

Standards and Working Principle
The chamber is designed to comply with IEC 60068-2-78 for steady-state damp heat testing, IEC 60068-2-30 for cyclic damp heat, ASTM E104 for humidity generation using saturated salt solutions, and GB/T 2423.3 for the Chinese national equivalent. Temperature control relies on PT100 Class A sensors with 0.001°C resolution paired with PID regulation, holding stability within ±0.5°C. Humidity is generated through a steam-injection or ultrasonic system combined with dew-point sensing, maintaining accuracy within ±2.0% RH even at the 100% RH ceiling, where condensation risk is highest. Centrifugal fans distribute air multi-directionally, keeping spatial variation under ±1.5°C so that every sample position experiences equivalent conditions.

Testing Methods
Verification typically follows a multi-point uniformity check: sensors are placed at nine or more locations inside the working space, and temperature/humidity readings are logged over a minimum 2-hour stabilized period. Recovery time after a simulated door opening is measured-an acceptable chamber returns to setpoint within 5 to 10 minutes. Long-duration holds, often 96 to 1000 hours depending on the standard, confirm that the chamber sustains conditions without drift, which is essential for pharmaceutical stability testing under ICH Q1A(R2) and electronics damp-heat qualification.

A customer in Uzbekistan recently purchased Controlled Rh 100 Laboratory Climate Chambers from LIB Industry after running full performance testing on a sample unit. Their evaluation covered temperature accuracy, humidity recovery speed, and long-term stability, and the results confirmed several advantages that led to the larger order.

First, safety compliance stood out. The chambers carry CE marking, meet IEC 61010-1 electrical safety requirements, and can be configured to CSA standards for markets requiring North American certification-giving the customer confidence for both regional use and potential export applications. Second, testing precision matched their specification sheet: temperature held within ±0.5°C and humidity within ±2.0% RH across repeated trial runs, even at the demanding 100% RH setting.

Cost-effectiveness was another deciding factor. Compared to importing chambers from Western manufacturers, the customer achieved comparable specifications at a significantly lower total cost, without compromising on build quality-interiors are SUS304 stainless steel and exteriors use coated A3 steel for corrosion resistance.

Customization also played a major role. LIB Industry offered free-of-charge customization up to 2000 L internal volume, adjusting shelving, port placement, and program presets to match the customer's specific sample types-all included in the base quotation with no added engineering fee. Combined with a 3-year warranty and lifetime service support, the customer felt fully covered for long-term operation. On-site training was arranged for their technical staff, covering program setup, routine maintenance, and calibration verification, which the customer described as a highly practical and people-oriented service experience. Finally, humidity stability during their own 72-hour internal trial showed no significant fluctuation, reinforcing their decision to standardize on five units across their facility.

How to Choose: If your lab tests individual components, PCBs, or small material samples in frequent, varied test cycles, a benchtop or upright Controlled Rh 100 Laboratory Climate Chamber offers faster setup and lower cost per test. If your operation needs to condition large finished products, multiple units simultaneously, or run continuous production-line validation, a walk-in chamber provides the volume and throughput needed, despite the larger footprint and installation effort.

LIB industry's Popular Controlled Laboratory Climate Chambers

 

Benchtop Controlled Climatic Environmental Chamber

Space-Saving Laboratory Design, Precise Temperature and Humidity Control  

Reach-In Controlled Climatic Environmental Chamber

Versatile Testing for Multiple Industries, Stable and Uniform Environmental Conditions  

Drive In Controlled Climatic Environmental Chamber

Easy Access for Large Test Specimens, High-Capacity Environmental Simulation  

Temperature Humidity Vibration Chamber

Combined Climatic and Vibration Testing, Reduced Testing Time and Improved Correlation  

Oven

Rapid Heating Performance, Reliable Long-Term Thermal Aging Tests 

Fast Change Rate Thermal Cycle Chamber

Up to 5/ 10/ 20°C/min Temperature Ramp Rates, Accelerated Product Reliability Validation. 

Q1: Can the chamber truly maintain 100% RH without condensation damaging samples?
Yes. The chamber uses a controlled dew-point approach and internal drainage design to sustain saturation conditions while minimizing free water accumulation on sample surfaces, in line with IEC 60068-2-78 requirements.

Q2: What after-sales service is included?
LIB Industry provides a 3-year warranty, lifetime technical support, and on-site or remote training for calibration and maintenance procedures.

Q3: How long does shipping and installation typically take?
Standard units usually ship within 25 to 35 working days after order confirmation, depending on customization level. Sea freight to regions such as Central Asia typically takes 20 to 30 additional days, with LIB Industry coordinating logistics and providing installation guidance upon arrival.

Q4: Can the chamber be customized for volumes larger than standard models?
Yes, customization up to 2000 L is available at no additional design cost, including shelving configuration, port placement, and program presets tailored to specific testing needs.

Q5: What certifications does the chamber carry?
Units are CE marked and can be configured to meet IEC 61010-1 electrical safety and CSA requirements depending on the destination market.

Contact LIB Industry today to request a technical specification sheet, arrange a live demonstration, or discuss customization options for your Controlled Rh 100 Laboratory Climate Chamber.