YiHeng BPS Series Programmable Temperature and Humidity Chamber

Overview

The YiHeng BPS Series Programmable Temperature and Humidity Chamber is an engineered environmental test system designed for precise, repeatable simulation of controlled thermal and hygroscopic conditions in laboratory and quality assurance settings. Built upon a robust vertical cabinet architecture, it employs a balanced air circulation system coupled with TMHM (Temperature and Humidity Mutual Harmonization) control methodology — a proprietary algorithm that dynamically coordinates refrigeration, heating, and humidification subsystems to minimize cross-coupling effects and achieve high stability in both temperature and relative humidity domains. This chamber is widely deployed in material aging studies, pharmaceutical stability testing (per ICH Q1 guidelines), electronics reliability validation, packaging integrity assessment, and accelerated corrosion testing. Its compliance-ready design supports adherence to key international standards including ISO 16750-4 (road vehicles), ASTM D4332 (conditioning of plastics), and IEC 60068-2 series (environmental testing procedures).

Key Features

• 7-inch full-color resistive touchscreen controller with intuitive graphical interface, supporting English and Chinese language modes and real-time display of temperature/humidity trend curves.
• Advanced PID auto-tuning algorithm continuously optimizes control parameters during operation, ensuring rapid recovery from disturbances and maintaining setpoint accuracy within ±1°C temperature and ±3% RH humidity tolerances.
• 304-grade mirror-finish stainless steel interior with seamless semi-circular corner transitions and fully removable, height-adjustable shelves — facilitating thorough cleaning and minimizing microbial retention points.
• Dual-stage safety architecture: primary control loop with adaptive compensation + independent mechanical over-temperature cut-off relay, providing redundant protection against thermal runaway.
• Eco-conscious refrigeration system utilizing non-ozone-depleting, low-GWP refrigerant; integrated energy-saving mode reduces compressor cycling frequency without compromising control fidelity.
• Integrated Φ25 mm test port with silicone gasket seal enables external sensor feedthrough or sample monitoring while preserving chamber integrity.
• Power-fail resilience: all user-defined programs, setpoints, and runtime logs are retained in non-volatile memory and automatically resumed post-recovery.

Sample Compatibility & Compliance

The BPS Series accommodates a broad spectrum of sample types — from small electronic components and polymer films to pharmaceutical blister packs and biological culture plates — thanks to its modular interior layout and uniform airflow distribution. Internal dimensions scale across three standard models (BPS-50CH, BPS-100CH, BPS-250CH), enabling selection based on volume requirements without sacrificing spatial homogeneity. The chamber meets essential regulatory prerequisites for GLP-compliant environments: data integrity safeguards (via optional RS-485 logging), audit-trail-capable parameter history (when paired with compatible SCADA software), and traceable calibration support. While not pre-certified to FDA 21 CFR Part 11, its architecture permits implementation of electronic signature workflows and secure user access controls when integrated into validated IT infrastructure.

Software & Data Management

Standard controller firmware includes built-in data logging (up to 30 days at 1-minute intervals) with timestamped CSV export via USB. Optional RS-232/RS-485 connectivity enables integration with third-party laboratory information management systems (LIMS) or custom Python/Matlab-based acquisition scripts. An optional thermal printer module provides hard-copy output of real-time curves and event-triggered alarms. For advanced analysis, YiHeng supplies Windows-compatible configuration software that supports remote program editing, multi-chamber synchronization, and automated report generation aligned with ISO/IEC 17025 documentation templates. All communication protocols adhere to Modbus RTU conventions, ensuring interoperability with industrial PLC networks.

Applications

• Stability testing of active pharmaceutical ingredients (APIs) and finished dosage forms under ICH Q5A–Q5E conditions.
• Accelerated aging of polymers, composites, and adhesives per ASTM D3045 and ISO 2578.
• Environmental stress screening (ESS) of printed circuit boards (PCBs) and microelectromechanical systems (MEMS).
• Conditioning of paper, textiles, and wood-based materials prior to mechanical testing (ASTM D618, ISO 291).
• Validation of packaging barrier performance under cyclic humidity exposure (ASTM F1249, ISO 15106).
• Long-term storage simulation for reference standards and calibration artifacts requiring strict ambient control.

FAQ

What is the maximum allowable operating temperature and humidity combination?
The chamber achieves 85°C at ≤35% RH; above 60°C, the operational humidity range narrows to 80–95% RH to prevent condensation-related instability.
Does the controller support ramp-soak profiles with variable rates?
Yes — each of the 1000 programmable segments supports independent ramp rate definition (°C/min and %RH/min), soak duration, and conditional branching logic.
Is calibration certification included with shipment?
Factory calibration reports (traceable to NIM, China) are provided; UKAS or ISO/IEC 17025-accredited calibration is available as a value-added service.
Can the chamber operate unattended for extended periods?
Yes — with full alarm logging, email/SMS alert integration (via optional Ethernet gateway), and power-loss recovery, it is suitable for 7×24 validation runs.
What maintenance intervals are recommended for optimal performance?
Compressor oil inspection every 24 months; humidifier tank cleaning weekly; stainless steel interior wipe-down after each use; annual verification of sensor drift against NIST-traceable references.