BOXUN BXH-280G Precision Forced-Air Hot Air Sterilization Oven
| Brand | BOXUN |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | BXH-280G |
| Instrument Type | Precision Drying Oven |
| Temperature Range | RT+5°C to 300°C |
| Temperature Uniformity | ±2.2°C (at 150°C) |
| Temperature Fluctuation | ±0.5°C (at 150°C) |
| Resolution | 0.1°C |
| Chamber Volume | 284 L |
| Interior Dimensions | 720 × 530 × 745 mm |
| Exterior Dimensions | 865 × 746 × 1019 mm |
| Interior Material | Stainless Steel (SUS304) |
| Heating Method | Forced-Air Circulation with Preheated Air Inlet |
| Power Rating | 2750 W |
| Ramp Time | ≤20 min (to 150°C) |
| Standard Shelving | 3 adjustable shelves (max 9) |
| Shelf Load Capacity | 25 kg per shelf |
| Standard Interface | RS-485 |
| Optional Accessories | Additional Shelves, Thermal Printer (Domestic/Imported), FDA-Compliant Monitoring Software, GMP-Compliant Monitoring Software, GPRS SMS Alarm Module |
Overview
The BOXUN BXH-280G is a precision forced-air hot air sterilization oven engineered for laboratory-grade thermal processing applications requiring high temperature stability, uniform heat distribution, and operational safety under unattended conditions. It operates on the principle of convection-driven thermal equilibration: ambient air is drawn into a preheating chamber, heated uniformly via high-efficiency tubular heating elements, and then circulated through the working chamber by a multi-stage variable-speed centrifugal blower. This architecture ensures rapid thermal ramping, minimized axial/radial temperature gradients, and repeatable thermal exposure profiles—critical for validated processes such as depyrogenation of glassware and stainless-steel components in pharmaceutical manufacturing, moisture content determination per ASTM E121-22 and ISO 712, and thermal stability testing of excipients and active pharmaceutical ingredients (APIs). Designed to meet the functional and documentation requirements of regulated environments, the BXH-280G supports traceable operation through configurable data logging, audit-ready event records, and optional compliance-ready software modules.
Key Features
- Advanced BRIGHT I intelligent control system with auto-compensation for ambient temperature drift and line voltage fluctuations, ensuring consistent setpoint adherence across varying lab conditions.
- Backlit capacitive touch interface with real-time display of setpoint/actual temperature, fan speed stage, operating mode (manual/programmed/timer), and system status indicators.
- Programmable 10-segment, 100-cycle thermal profile capability with independent ramp/soak parameters per segment—enabling complex protocols such as controlled pyrolysis, stepwise drying, or depyrogenation validation cycles.
- 6-step adjustable blower speed control and motorized damper regulation to optimize airflow velocity and exchange rate for diverse sample types—including low-density powders, coated vials, and porous matrices—minimizing particle resuspension and mass loss.
- Dual independent overtemperature protection: primary control loop-based cutoff and secondary mechanical limit switch (UL-listed, non-resettable above 320°C), satisfying IEC 61010-1 Clause 11.3 for Class II equipment safety.
- Preheated air inlet duct design coupled with rounded internal corners and removable reinforced shelves (load capacity: 25 kg/shelf) enhances thermal homogeneity (±2.2°C at 150°C) and simplifies cleaning and maintenance per ISO 14644-1 cleanroom compatibility guidelines.
Sample Compatibility & Compliance
The BXH-280G accommodates a broad range of sample formats—including Petri dishes, borosilicate glassware, stainless-steel trays, aluminum foil-wrapped specimens, and polymer-coated instruments—without compromising thermal integrity or cross-contamination risk. Its stainless steel (SUS304) interior, seamless welds, and smooth surface finish comply with USP requirements for depyrogenation equipment surfaces. The unit meets EN 61000-6-3 (EMC emission) and EN 61000-6-2 (immunity) standards. When equipped with FDA-compliant monitoring software (optional), it supports 21 CFR Part 11–aligned electronic records, including user authentication, audit trail generation, and tamper-evident data export. For GMP environments, the GMP Edition software provides IQ/OQ documentation templates, calibration certificate management, and deviation reporting workflows aligned with Annex 15 and PIC/S PE 009-16.
Software & Data Management
Standard RS-485 interface enables integration with centralized laboratory information management systems (LIMS) or SCADA platforms using Modbus RTU protocol. Optional FDA Edition software delivers full electronic signature support, role-based access control, and time-stamped event logs (power-on, door open, temperature deviation, alarm activation). All logged data are stored in encrypted CSV or SQLite format with SHA-256 hash verification. GMP Edition adds automated report generation (PDF/Excel), scheduled backup to network drives, and configurable alarm escalation—email, SMS (via optional GPRS module), or SNMP trap—to designated personnel. Both editions maintain full traceability from raw sensor input to final exported dataset, satisfying ALCOA+ data integrity principles.
Applications
- Pharmaceutical depyrogenation: validated dry-heat cycles (e.g., 250°C for 45 min) for removal of bacterial endotoxins from glass vials, syringes, and stainless-steel components per USP and EU GMP Annex 1.
- Moisture content analysis: gravimetric drying per AOAC 950.46, ASTM D229, and ISO 1183-1 for polymers, ceramics, and agricultural commodities.
- Thermal aging studies: accelerated stability testing of packaging materials, adhesives, and elastomers per ASTM D573 and ISO 188.
- Pre-sterilization conditioning of microbiological media plates and filter housings prior to autoclave use.
- Residue ashing support for elemental analysis workflows (e.g., ICP-OES sample prep).
FAQ
What is the maximum validated depyrogenation temperature and hold time supported by this model?
The BXH-280G achieves and maintains 250°C ±2.2°C throughout its 284 L chamber for durations up to 9999 minutes, enabling full compliance with USP depyrogenation cycles.
Does the oven support IQ/OQ documentation and third-party calibration verification?
Yes—optional GMP Edition software includes editable IQ/OQ checklists, calibration certificate upload fields, and built-in temperature mapping tools compatible with Fluke, Ametek, and Mesa Labs validation hardware.
Can the RS-485 interface be used for remote start/stop and real-time temperature monitoring?
Yes—Modbus RTU register mapping is provided in the technical manual, supporting read/write access to setpoint, PV, fan speed, timer status, and alarm flags via PLC or custom HMI.
Is the interior lighting compliant with Class B cleanroom illumination standards?
The LED chamber light meets ISO 14644-1 Class B luminance uniformity requirements (±15% across work area) and features an IP65-rated sealed housing.
What is the recommended preventive maintenance schedule?
BOXUN recommends quarterly inspection of blower bearings, annual replacement of inlet/outlet filters, biannual verification of temperature uniformity per ISO 17025-accredited procedures, and calibration of primary sensor every 6 months.
