DJH Series Benchtop Forced-Air Drying Oven
| (产地 | Shanghai |
|---|---|
| Manufacturer Type | Distributor |
| Origin | Domestic (China) |
| Model | DJH |
| Price | Upon Request |
| Power Supply | 220 V, 50 Hz |
| Temperature Range | RT+10°C to 250°C (L-Series) / RT+10°C to 300°C (M-Series) |
| Temperature Resolution | ±0.1°C |
| Temperature Uniformity | ±0.5°C (L-Series) / ±1.0°C (M-Series) |
| Operating Ambient | 5–40°C |
| Input Power | 500–2870 W (model-dependent) |
| Chamber Dimensions (W×D×H, mm) | 300×300×270 to 600×550×750 |
| External Dimensions (W×D×H, mm) | 500×450×440 to 880×770×930 |
| Standard Shelving | 2 stainless steel trays |
| Timer Range | 1–9999 minutes |
| Interface Option | RS485 for data logging |
| Safety Features | Independent over-temperature cut-off, P.I.D. temperature control with digital display) |
Overview
The DJH Series Benchtop Forced-Air Drying Oven is an engineered solution for precise thermal processing in laboratory and industrial quality control environments. Designed around a robust convection-based heating architecture, it delivers consistent, repeatable temperature profiles across the entire working chamber—enabling reliable drying, baking, sterilization, wax melting, and accelerated aging applications. Its core principle relies on forced-air circulation: high-temperature-stable axial fans drive heated air through calibrated ducts, ensuring rapid thermal equilibration and minimizing vertical/horizontal gradients. Unlike natural-convection ovens, this design achieves superior temperature uniformity (±0.5°C typical for L-series units), critical for ASTM D5422 (polymer aging), ISO 17025-compliant calibration workflows, and USP dry-heat sterilization validation protocols.
Key Features
- Chamber constructed from mirror-finish 304 stainless steel with argon arc welding—resistant to oxidation, corrosion, and repeated thermal cycling up to 300°C.
- Exterior housing fabricated from cold-rolled steel with powder-coated finish for mechanical durability and long-term dimensional stability.
- Digital microprocessor-based P.I.D. temperature controller with real-time display, adjustable ramp/soak parameters, and ±0.1°C resolution; optional programmable LCD controller supports multi-step thermal profiles.
- Independent mechanical over-temperature safety cutoff—hardwired circuitry that interrupts power independently of the main controller, meeting IEC 61010-1 requirements for Class II laboratory equipment.
- Forced-air system utilizes thermally rated motors (Class H insulation) and optimized airflow channels to maintain uniformity across full load conditions, validated per ISO 15502 Annex B methodology.
- RS485 serial interface (optional) enables integration with LabVIEW, SCADA, or LIMS platforms for automated temperature logging, audit trail generation, and 21 CFR Part 11–compliant electronic records.
Sample Compatibility & Compliance
The DJH oven accommodates standard laboratory glassware (e.g., Petri dishes, weighing boats, crucibles), polymer samples, metal coupons, and pharmaceutical excipients without degradation of chamber integrity. All models comply with GB/T 10587–2006 (Chinese national standard for electric heating ovens) and meet essential safety requirements aligned with EN 61010-1:2010. When configured with data logging and user-access controls, the system supports GLP and GMP environments—particularly for stability testing (ICH Q1A), residual solvent removal (USP ), and pre-sterilization conditioning of surgical instruments.
Software & Data Management
With the optional RS485 interface, users can deploy third-party acquisition software (e.g., WinQSB, MATLAB Data Acquisition Toolbox) to capture timestamped temperature readings at user-defined intervals. The controller’s firmware stores up to 10,000 data points internally and supports CSV export for traceability. Audit trails—including operator ID, parameter changes, and alarm events—are retained for ≥30 days. While the base unit does not include FDA 21 CFR Part 11–certified software, its hardware architecture permits integration with validated enterprise systems meeting electronic signature and record retention requirements.
Applications
- Moisture content determination per AOAC 950.46 and ASTM D2272 (lubricants).
- Thermal aging of elastomers and composites per ASTM D573 and ISO 188.
- Drying of filter papers, soil samples, and biological tissues prior to gravimetric analysis.
- Baking of ceramic green bodies and metallurgical powder compacts.
- Pre-conditioning of test specimens for tensile, impact, and hardness evaluation (ASTM D638, E23).
- Heat treatment of calibration standards used in thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC).
FAQ
What is the maximum allowable operating temperature for the M-series models?
The M-series units are rated for continuous operation up to 300°C, verified under full-load conditions with internal thermocouple mapping per ISO 15502.
Can the oven be used for sterilization of medical devices?
Yes—when operated at ≥160°C for ≥120 minutes, it satisfies dry-heat sterilization criteria outlined in ISO 17665-1 and USP , provided load configuration and air exchange rates are validated per site-specific protocol.
Is the temperature controller compliant with GLP documentation requirements?
The base controller provides time-stamped setpoint logs and alarm history; full GLP compliance requires integration with external validated software that enforces electronic signatures, change control, and secure audit trails.
How many shelves are included, and are additional ones available?
Each unit ships with two adjustable 304 stainless steel shelves; supplementary shelves (part no. DJH-SH-01) are available as accessories and retain the same thermal mass and surface finish.
Does the oven support ramp-and-soak programming out of the box?
The standard P.I.D. controller offers basic timer-based on/off control; ramp-and-soak functionality requires the optional programmable LCD controller (DJH-PC-LCD), which supports up to 30 segments per program.
