BOXUN BSC-150 Temperature and Humidity Controlled Environmental Chamber

Overview

The BOXUN BSC-150 Temperature and Humidity Controlled Environmental Chamber is an engineered solution for precise, long-term simulation of controlled climatic conditions in laboratory and industrial quality assurance settings. Based on dual-loop PID control architecture—separate proportional-integral-derivative algorithms governing temperature and humidity independently—the chamber delivers stable, repeatable environments essential for stability testing, accelerated aging studies, and material performance evaluation. Its thermodynamic design integrates a high-efficiency hermetic compressor, non-ozone-depleting R134a refrigerant, and a finned-tube electric humidifier backed by a 5-liter external water reservoir, enabling uninterrupted operation over extended test durations. The chamber conforms to core requirements outlined in ICH Q1A(R2), ISO 14644-1 (cleanroom classification support), and ASTM D4332 for conditioning of test specimens prior to physical property assessment.

Key Features

• Microprocessor-based intelligent controller with backlit LCD interface displaying real-time temperature, relative humidity, elapsed time, and programmable segment status
• Patented integrated refrigeration system with multi-layer safety interlocks—including compressor overheat protection, refrigerant pressure monitoring, and automatic fault logging
• Optimized air circulation architecture featuring centrifugal blower and proprietary baffle-guided airflow path, achieving ≤±1°C temperature uniformity at 37°C across full working volume
• Corrosion-resistant interior constructed from mirror-finish 304 stainless steel; cold-rolled steel exterior with electrostatic epoxy powder coating
• Three adjustable stainless steel shelves with load capacity up to 15 kg per shelf; optional reinforced shelving available for heavy-duty applications
• Energy-efficient defrost cycle utilizing passive thermal siphon principle—no power interruption or temperature perturbation during defrost events
• Standard mechanical door lock preventing unauthorized access; optional electromagnetic lock upgrade available for GLP/GMP-compliant audit trails
• RS-485 serial interface compliant with Modbus RTU protocol, supporting remote parameter configuration and data streaming to LIMS or SCADA platforms

Sample Compatibility & Compliance

The BSC-150 accommodates a broad spectrum of sample formats including Petri dishes, vials, blister packs, textile swatches, polymer films, and pharmaceutical primary packaging units. Its internal dimensions (510 × 390 × 760 mm) provide sufficient clearance for stacked trays or custom fixtures. All materials contacting the test environment meet USP Class VI biocompatibility criteria. Humidity sensing employs a calibrated capacitive RH sensor traceable to NIST standards, ensuring measurement integrity within ±5% RH accuracy across the 50–90% operational band. The system supports 21 CFR Part 11-compliant electronic records when paired with validated third-party data acquisition software—enabling signature-enabled audit logs, user role management, and change history tracking.

Software & Data Management

While the embedded controller supports standalone operation—including 30-segment × 99-cycle programmability, power-loss recovery, and parameter retention—the BSC-150 is designed for integration into regulated workflows. Via the RS-485 port, users may deploy industry-standard protocols to archive time-stamped environmental profiles directly into SQL-based databases or cloud-hosted QA systems. Optional printer module generates timestamped thermal/hygrometric trend reports meeting ISO/IEC 17025 documentation requirements. All firmware revisions undergo formal verification per IEC 62304, with release notes and validation summaries available upon request for regulatory submissions.

Applications

• ICH-aligned stability testing of APIs and finished dosage forms under long-term (25°C/60% RH) and accelerated (40°C/75% RH) conditions
• Moisture sorption isotherm determination for hygroscopic excipients and active ingredients
• Accelerated aging of medical device packaging per ISO 11607-1
• Conditioning of textile specimens prior to tensile, abrasion, or colorfastness analysis (ASTM D1776)
• Pre-test equilibration of composite materials and adhesives before mechanical or thermal characterization
• Storage validation for reference standards and calibration materials requiring strict ambient control

FAQ

What is the recommended calibration interval for the BSC-150?

Annual calibration against NIST-traceable reference standards is advised; temperature sensors should be verified at three points (e.g., 25°C, 37°C, 50°C), and humidity sensors at two RH setpoints (e.g., 60% and 75% RH).
Can the chamber operate continuously for 30 days without maintenance?

Yes—when filled with deionized water and operated within specified environmental limits (ambient temperature ≤30°C, relative humidity ≤80%), the BSC-150 supports unattended 720-hour runs with no manual intervention required.
Is the RS-485 interface compatible with LabVIEW and Python-based automation frameworks?

Yes—Modbus RTU implementation enables native integration via standard VISA drivers or open-source libraries such as pymodbus and minimalmodbus.
Does the unit comply with CE marking requirements for EMC and safety?

The BSC-150 carries CE marking under Directive 2014/30/EU (EMC) and 2014/35/EU (LVD), with test reports available under confidentiality agreement.
How is temperature uniformity validated across the working volume?

Per ISO 16730-1, nine-point mapping using calibrated thermistors is performed at nominal operating setpoints; results are documented in the Factory Acceptance Test (FAT) report supplied with each unit.