BOXUN BXH-280S Precision Programmable Forced-Air Drying Oven
| Brand | BOXUN |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | BXH-280S |
| Temperature Range | RT+5°C to 300°C |
| Temperature Uniformity (at 150°C) | ±2.2°C |
| Temperature Fluctuation (at 150°C) | ±0.5°C |
| Recovery Time (30 s, at 150°C) | 8 min |
| External Dimensions (L×W×H, mm) | 885×930×795 |
| Internal Chamber Dimensions (L×W×H, mm) | 720×745×530 |
| Chamber Material | Stainless Steel (AISI 304) |
| Heating Method | Forced-Air Circulation with Rear-Mounted Heater |
| Ramp/Soak Programming | 30 segments × 99 cycles |
| Data Storage Capacity | 4 million records |
| Interface | Dual RS-485 ports + 1 USB port |
| Cooling Mode | Post-cycle rapid cooling fan activation |
| Safety | Dual independent overtemperature protection (PID-controlled sensor + mechanical cut-off switch) |
| Airflow Control | 5-step fan speed + 10-step adjustable exhaust damper |
Overview
The BOXUN BXH-280S is a high-precision, microprocessor-controlled forced-air drying oven engineered for laboratories requiring strict thermal stability, programmable process control, and regulatory-compliant operation. It operates on the principle of convection-based heat transfer, utilizing rear-mounted heating elements and a dynamically balanced axial fan to generate uniform airflow across the stainless-steel chamber. The oven’s thermal architecture—featuring insulated double-wall construction, optimized internal air ducting, and calibrated airflow modulation—ensures reproducible temperature distribution per ISO 14644-1 Class 100 (when equipped with optional HEPA filtration) and meets the spatial uniformity requirements defined in ASTM E145–22 (Standard Specification for Gravity-Convection and Forced-Ventilation Ovens). Designed for applications ranging from moisture content determination (per AOAC 950.46 and USP ) to polymer curing, pharmaceutical stability testing (ICH Q1A–Q1E), and pre-sterilization drying of glassware, the BXH-280S delivers consistent thermal performance across its full operating range of RT+5°C to 300°C.
Key Features
- 5-inch high-resolution capacitive touchscreen interface with real-time display of setpoint/actual temperature, ramp/soak program status, timer countdown, fan speed level, exhaust damper position, and system operational state
- Programmable multi-segment thermal profiles: up to 30 temperature/time segments per cycle, with up to 99 repeat cycles; supports controlled ramp rates (°C/min) and dwell times with user-defined hold conditions
- Dual independent overtemperature protection: primary PID-controlled digital limit (software-configurable) and secondary hardware-based thermal cutoff switch (fail-safe, non-resettable without manual intervention)
- Five-stage variable-speed blower and ten-position adjustable exhaust damper—enabling precise control of air exchange rate and chamber pressure differential for sensitive sample drying or solvent evaporation protocols
- Integrated data logging: stores up to 4 million timestamped temperature readings (sample interval configurable from 1 s to 60 min); exportable via USB to CSV or XLSX format for audit trail generation
- Rapid thermal recovery design: achieves ≤8-second stabilization after door opening at 150°C (per internal validation per ISO/IEC 17025 clause 7.8.2)
- Post-cycle active cooling function: automatically engages auxiliary cooling fan upon program completion to accelerate chamber cooldown without compromising thermal sensor integrity
- Screen lock with customizable password protection (screen saver mode) prevents unauthorized parameter modification during unattended operation
Sample Compatibility & Compliance
The BXH-280S accommodates standard laboratory glassware (e.g., Petri dishes, weighing bottles, crucibles) and metal trays up to 720 mm × 530 mm footprint. Its AISI 304 stainless-steel interior resists corrosion from acidic vapors, organic solvents, and saline residues. Optional accessories—including HEPA-filtered air intake (ISO Class 100 compliant), NIST-traceable wireless temperature loggers (validated to 130°C), and dual-point calibration certificates (0°C, 60°C, 121°C)—support qualification under GMP Annex 15, FDA 21 CFR Part 11 (with optional FDA/GMP monitoring software), and EU GMP Annex 15 IQ/OQ/PQ frameworks. The unit complies with IEC 61010-1:2010 for electrical safety and EN 60529 IP20 ingress protection rating.
Software & Data Management
Data acquisition and reporting are supported via embedded firmware with configurable logging intervals and alarm thresholds. USB export enables traceable data transfer to LIMS or ELN systems. Optional FDA/GMP Edition software provides electronic signature capability, audit trail with immutable timestamps, role-based access control, and automated report generation aligned with 21 CFR Part 11 Subpart B requirements. RS-485 Modbus RTU protocol allows integration into centralized building management or MES platforms. All stored data includes metadata: operator ID (if assigned), program name, cycle number, ambient temperature/humidity (when external sensors are connected), and event flags (door open/close, alarm trigger, power interruption).
Applications
- Moisture loss-on-drying assays (USP , Ph. Eur. 2.2.32)
- Thermal degradation studies of excipients and APIs
- Pre-sterilization drying of surgical instruments and packaging components
- Curing of epoxy resins, adhesives, and composite laminates
- Baking of printed circuit boards (PCB) prior to solder paste application
- Accelerated stability testing per ICH Q1A(R3) guidelines
- Residue ashing preparation for elemental analysis (e.g., ASTM D4294)
FAQ
What is the maximum validated temperature uniformity across the working chamber?
At 150°C, temperature uniformity is validated at ±2.2°C (per 9-point mapping per ISO 14644-1 Annex B), measured at center and eight peripheral locations within the usable volume.
Can the BXH-280S be qualified for GMP environments?
Yes—when configured with optional wireless temperature mapping probes, FDA/GMP software, and executed IQ/OQ protocols, it supports compliance with EU GMP Annex 15 and PIC/S PI 007-6.
Is the USB data export compliant with ALCOA+ principles?
Exported CSV/XLSX files include embedded metadata (timestamp, operator ID, instrument serial number, firmware version), enabling full data integrity alignment with ALCOA+ (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available).
Does the oven support remote monitoring via network connection?
While no built-in Ethernet/Wi-Fi is included, RS-485 Modbus integration enables connection to industrial gateways; optional GPRS module provides SMS-based alarm notifications to designated mobile numbers.
What validation documentation is supplied with the standard unit?
Factory calibration certificate (three-point verification at 0°C, 60°C, and 121°C), CE Declaration of Conformity, and electrical safety test report per IEC 61010-1 are provided. Full 3Q documentation packages are available as add-on services.
