Labonce Labonce-500TH-T Temperature and Humidity Controlled Environmental Test Chamber

Overview

The Labonce Labonce-500TH-T is a precision-engineered temperature and humidity controlled environmental test chamber designed for rigorous stability testing, accelerated aging studies, material conditioning, and long-term reliability evaluation in R&D laboratories, quality control departments, and manufacturing facilities. It operates on the principle of forced-air convection with dual independent control loops—separate PID-regulated refrigeration and humidification subsystems—to maintain stable, repeatable climatic conditions across its 500 L working volume. The chamber meets the structural, performance, and metrological requirements specified in GB/T 10586–2006, ensuring traceable compliance with national standards for damp heat test equipment in China. Its architecture supports both steady-state (constant) and programmable (cyclic) test profiles, enabling users to replicate real-world environmental stressors—including diurnal thermal cycles, seasonal humidity variations, and storage-condition simulations—for plastics, electronics, pharmaceutical packaging, adhesives, and composite materials.

Key Features

• Advanced air distribution system featuring optimized duct geometry and tangential airflow delivery to ensure uniform temperature and humidity distribution (≤2.0 °C uniformity, <±0.5 °C fluctuation)
• High-density polyurethane foam insulation (≥100 mm thick, closed-cell structure) minimizing thermal bridging and reducing energy consumption during extended operation
• Corrosion-resistant interior constructed entirely from mirror-finish AISI 304 stainless steel—non-porous, non-outgassing, and compliant with ISO 14644-1 Class 8 cleanroom-compatible surface requirements
• Robust refrigeration circuit powered by a hermetically sealed, low-noise scroll compressor with R134a refrigerant, delivering stable cooling down to 0 °C under full-load humidification
• Intuitive 7-inch full-color TFT touchscreen controller with multi-segment programmable logic—supporting up to 100 steps, 99 cycles, and real-time parameter override without interrupting active programs
• Capacitive humidity sensor (imported, high-temperature rated) offering long-term stability (<±0.5 %RH/year drift), minimal hysteresis, and zero maintenance over typical service intervals
• Dual-stage safety architecture: independent mechanical overtemperature cutoff (bimetallic switch), dry-run protection for humidifier, and audible/visual alarm activation upon fault detection

Sample Compatibility & Compliance

The Labonce-500TH-T accommodates diverse sample configurations via four adjustable stainless steel shelves (standard), a 50 mm diameter test port with silicone rubber plug, and optional internal LED lighting for visual inspection. Its interior dimensions (680 × 680 × 1080 mm) support stacked trays, PCB racks, blister-pack arrays, and medium-volume packaging validation batches. While not certified to IEC 60068 or ASTM E145 as shipped, the chamber’s performance envelope and documented calibration traceability align with common prequalification criteria for GLP-compliant stability chambers. Users may implement additional validation protocols—including IQ/OQ/PQ per Annex 15 and WHO TRS 992—using external calibrated reference sensors and documented SOPs. All electrical components comply with GB 4793.1–2019 (equivalent to IEC 61010-1) for laboratory equipment safety.

Software & Data Management

Data logging is handled internally by the embedded controller, storing time-stamped temperature and humidity values at user-selectable intervals (1–60 minutes) for up to 180 days. Historical datasets are exportable via USB flash drive in CSV format—compatible with Microsoft Excel, MATLAB, and LIMS platforms. The system records event logs (e.g., door openings, program starts/stops, alarm triggers) with timestamps, supporting basic audit trail requirements. For enhanced data integrity in regulated environments, optional printer integration provides hard-copy output of real-time trends and summary reports. Although native network connectivity is not included, third-party Modbus RTU integration enables connection to SCADA systems or centralized monitoring servers using standard RS485 interfaces.

Applications

• Pharmaceutical stability testing per ICH Q1A(R3) guidelines (long-term, accelerated, intermediate conditions)
• Electronics component qualification per JESD22-A101 (damp heat life testing) and MIL-STD-810H Method 507.6
• Polymer aging studies evaluating tensile strength retention, discoloration, and dimensional stability under cyclic humidity exposure
• Adhesive bond durability assessment under elevated RH and thermal stress combinations
• Medical device packaging validation (ISO 11607-1) including peel strength and seal integrity monitoring
• Quality assurance of lithium-ion battery modules prior to cycling tests

FAQ

What is the maximum operating humidity at 100 °C?
The Labonce-500TH-T is rated for 20–95 %RH across its full 0–100 °C temperature range; however, sustained operation above 85 %RH at temperatures >85 °C is not recommended due to condensation risk and sensor accuracy degradation.

Is the chamber suitable for use in a GMP environment?
Yes—when equipped with appropriate validation documentation, calibration records, and procedural controls (e.g., access restrictions, change management), it supports GMP Annex 11 and FDA 21 CFR Part 11 compliance for electronic records when paired with qualified data export workflows.

Can the internal shelves be repositioned during operation?
Shelf positions are fixed during active testing; adjustment requires pausing the program and allowing thermal equilibration post-reconfiguration to avoid transient gradients.

Does the unit include NIST-traceable calibration certificates?
Factory calibration is performed using reference-grade sensors; NIST-traceable certificates are available as an add-on service with documented uncertainty budgets per ISO/IEC 17025.

What is the expected service life of the humidifier system?
With deionized water feed and quarterly descaling (recommended), the stainless steel steam generator typically exceeds 5 years of continuous operation before major maintenance.