Boxun BXK-250S Vacuum Drying Oven

Overview

The Boxun BXK-250S Vacuum Drying Oven is an engineered solution for precise, low-temperature dehydration and thermal stabilization of heat-sensitive, oxidation-prone, or structurally complex samples. Operating on the principle of reduced-pressure drying—where lowering ambient pressure depresses the boiling point of volatile components—the BXK-250S enables efficient moisture removal below conventional thermal thresholds. This makes it particularly suitable for applications where sample integrity, chemical stability, or residual solvent elimination is critical. Designed for compliance with fundamental laboratory quality requirements, the unit integrates vacuum control, multi-zone thermal management, and robust chamber architecture to support reproducible drying cycles across academic, pharmaceutical, and industrial R&D environments.

Key Features

• Triple-shelf heating system with independent PID temperature control per shelf—enabling simultaneous processing of heterogeneous samples at optimized thermal profiles
• Integrated vacuum pump housed within a sound-dampened cabinet, reducing operational noise by up to 40 dB(A) and minimizing lab footprint
• LCD microprocessor controller with real-time display of chamber temperature, setpoint, timer status, vacuum level (in Pa), and alarm conditions
• Stainless steel interior chamber (600 × 600 × 700 mm) with radius-rounded corners for enhanced cleanability and resistance to corrosion from solvents or acidic vapors
• Double-glazed, tempered observation door with high-seal silicone gasket—maintaining vacuum integrity up to 133 Pa while enabling visual monitoring without opening
• Auto-compensation vacuum regulation: detects vacuum decay caused by outgassing or vapor release and triggers automatic pump activation to restore preset pressure
• Power-fail recovery function: retains all user-defined parameters and active cycle state during unexpected power interruption; resumes operation upon restoration
• Over-temperature cut-off protection, door-open safety interlock, and audible/visual alarm for thermal deviation or vacuum loss

Sample Compatibility & Compliance

The BXK-250S accommodates a broad spectrum of sample formats—including powders, granules, lyophilized matrices, polymer films, ceramic precursors, and cleaned mechanical assemblies—without displacement or particle migration due to absence of convective airflow. Its stainless steel chamber complies with ISO 8573-1 (compressed air purity) and meets baseline material compatibility standards for GLP-aligned laboratories. While not certified to IEC 61010-1 as a standalone medical device, its electrical safety design conforms to EN 61010-1:2010 requirements for laboratory equipment. The system supports documentation traceability through manual log entries; optional RS-232 or USB data export facilitates integration into 21 CFR Part 11–compliant environments when paired with validated third-party software.

Software & Data Management

The BXK-250S operates via an embedded microcontroller interface with no external PC dependency. All operational parameters—including shelf-specific setpoints, vacuum target, timer duration, and alarm thresholds—are configured directly on the front-panel LCD. Cycle start/stop, pause/resume, and parameter recall are accessible via tactile keypad. Real-time vacuum and temperature values are continuously logged in non-volatile memory for up to 100 cycles. Export is supported via USB flash drive (FAT32 formatted) in CSV format, containing timestamped readings at user-selectable intervals (1 s to 600 s). No proprietary drivers or cloud connectivity are implemented—ensuring full data sovereignty and alignment with air-gapped lab network policies.

Applications

• Drying of thermolabile APIs and excipients in pharmaceutical development, minimizing degradation pathways associated with atmospheric drying
• Removal of residual solvents (e.g., acetone, dichloromethane) from coated substrates prior to SEM or XRD analysis
• Dehydration of biological tissues and botanical extracts while preserving enzymatic activity and volatile terpenoid profiles
• Conditioning of hygroscopic reference standards (e.g., USP , ISO 12099) under controlled vacuum and temperature
• Pre-treatment of catalyst supports and MOF precursors to eliminate physisorbed water without structural collapse
• Sterilization-equivalent treatment of glassware and quartz cuvettes where autoclaving is unsuitable

FAQ

What vacuum level can the BXK-250S achieve, and how is it maintained?
The system reaches a base vacuum of ≤133 Pa using its integrated 2 L/s rotary vane pump. A built-in pressure sensor monitors chamber vacuum in real time and initiates automatic pump reactivation if deviation exceeds ±10 Pa from the setpoint.
Can different shelves operate at different temperatures simultaneously?
Yes—each of the three adjustable shelves features dedicated heating elements and independent PID controllers, allowing discrete temperature setpoints ranging from ambient +2°C to 250°C.
Is the chamber volume truly 250 L, and how is usable space affected by shelf placement?
The nominal internal volume is calculated from the chamber’s net dimensions (0.6 × 0.6 × 0.7 m = 252 L). With three standard shelves installed, effective free volume remains ≥185 L, accommodating typical lab-scale trays and crucibles without obstruction.
Does the unit comply with electromagnetic compatibility (EMC) directives for European laboratories?
Yes—the BXK-250S meets EN 61326-1:2013 for EMC emission and immunity in laboratory environments, verified during factory type testing.
How is calibration verification performed for temperature and vacuum sensors?
Temperature uniformity is verified per ASTM E2207 using NIST-traceable PT100 probes at nine spatial points. Vacuum transducer linearity is confirmed against a calibrated capacitance manometer across the 1–1000 Pa range. Calibration certificates are available upon request.