Boxun BGZ-70 Forced-Air Drying Oven
| Brand | Boxun |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | BGZ-70 |
| Instrument Type | High-Temperature Forced-Air Oven |
| Temperature Range | Ambient +5°C to 250°C |
| Temperature Uniformity | ±2% (at setpoint) |
| External Dimensions (W×D×H) | 740 × 605 × 605 mm |
| Internal Chamber Dimensions (W×D×H) | 450 × 380 × 450 mm |
| Chamber Material | Mirror-Finish Stainless Steel (SUS304) |
| Heating Method | Forced-Air Circulation with Adjustable Fan Speed (6-step) |
| Control Resolution | 0.1°C |
| Temperature Fluctuation | ±1°C at 105°C |
| Chamber Volume | 76 L |
| Power Supply | AC 220 V ±10%, 50 Hz ±2% |
| Rated Power | 1350 W |
| Timer Range | 0–9999 min/h |
| Delay Start Range | 0–999 min |
| Programmable Stages | 10 segments × 100 cycles |
| Standard Shelving | 2 stainless steel shelves (max. 5), load capacity 15 kg per shelf |
| Interface | RS-485 for PC connectivity |
| Compliance Features | Power-loss recovery, over-temperature alarm, door-seal integrity verification via dual-stage rotary latch |
Overview
The Boxun BGZ-70 Forced-Air Drying Oven is an engineered solution for precise thermal processing in research laboratories, quality control environments, and industrial R&D settings. Based on the principle of convection-driven heat transfer, it employs a microprocessor-controlled forced-air circulation system to maintain consistent temperature distribution across its 76-liter stainless-steel chamber. Unlike natural-convection ovens, the BGZ-70 integrates a high-efficiency blower motor with six discrete airflow speed settings—enabling users to optimize convective exchange for sensitive samples (e.g., powders, polymers, or biological matrices) while minimizing particle displacement or surface degradation. Its operational range spans from ambient +5°C to 250°C, supporting applications including moisture removal, pre-weighing sample conditioning, polymer curing, solvent evaporation, and wax melting—all under reproducible thermal conditions validated per ISO 17025-aligned calibration protocols.
Key Features
- Mirror-finish SUS304 stainless-steel interior with radius-corner design for seamless cleaning and corrosion resistance
- Dual-stage rotary door latch mechanism ensuring uniform compression against high-density silicone gasket for Class II sealing performance
- PMMA-II touchscreen control system with color LCD display, offering real-time monitoring of temperature, elapsed time, remaining cycle duration, and fan speed level
- Programmable multi-stage heating profiles: up to 10 segments per program, repeatable over 100 cycles, with ramp/soak logic and automatic termination
- Preheated air inlet ducting directs thermally homogenized airflow directly into the working chamber—reducing thermal lag and improving spatial uniformity to ±2% across the full volume
- RS-485 serial interface compliant with Modbus RTU protocol for integration into centralized lab management systems or LIMS platforms
- Power-loss recovery function retains active program state and resumes operation post-interruption without manual reconfiguration
- Over-temperature safety cutoff with independent mechanical thermostat (fail-safe redundancy)
Sample Compatibility & Compliance
The BGZ-70 accommodates a broad spectrum of sample formats—including Petri dishes, weighing boats, crucibles, glassware, and standard ISO/ASTM-compliant test specimens—within its adjustable shelving configuration (2 standard, up to 5 total). Its chamber geometry (450 × 380 × 450 mm) supports ASTM D1654 (coating drying tests), ISO 712 (moisture content in cereals), and USP (thermal sterilization validation support). The unit meets CE marking requirements for electromagnetic compatibility (EN 61326-1) and low-voltage safety (EN 61010-1). While not certified for GMP cleanroom use, its construction and documentation support GLP-compliant operation when paired with external calibration logs and audit-trail-enabled software.
Software & Data Management
The integrated PMMA-II controller records timestamped temperature and fan-speed data at user-defined intervals (default: 1-minute resolution), storing up to 10,000 data points internally. Export is supported via RS-485 using Boxun’s proprietary LabLink software (Windows-compatible), which generates CSV-formatted reports traceable to NIST-traceable reference standards. Optional firmware upgrade enables 21 CFR Part 11-compliant electronic signatures and audit trail functionality—including operator ID tagging, parameter change logging, and immutable record archiving—when deployed with validated server infrastructure.
Applications
- Moisture content determination per AOAC 950.46 and ISO 5530-1
- Thermal conditioning of reference standards prior to gravimetric analysis
- Curing of epoxy resins and thermoset composites in materials science labs
- Drying of filter papers and sediment residues in environmental testing workflows
- Pre-drying of pharmaceutical excipients before tablet compression studies
- Accelerated aging protocols for packaging material stability assessments (ASTM F1980)
FAQ
What is the maximum allowable load per shelf?
Each stainless-steel shelf is rated for 15 kg; total chamber load must remain within thermal mass limits defined by IEC 61000-3-2 harmonic emission thresholds.
Does the oven support validation documentation packages?
Yes—factory-installed temperature mapping ports (2×) enable IQ/OQ execution; calibration certificates with as-found/as-left data are available upon request.
Can the fan speed be locked during a programmed cycle?
Yes—fan speed is fully programmable per segment and remains fixed unless modified manually or via script-based RS-485 command.
Is the chamber volume verified per ISO 27879?
Chamber volume is calculated geometrically from nominal internal dimensions and confirmed via water-displacement method during final QA inspection.
How is temperature uniformity verified during manufacturing?
Each unit undergoes 3-point (top/mid/bottom) thermal mapping at 105°C and 250°C using calibrated PT100 probes traceable to national metrology institutes.
