Labonce Labonce-145JMH Precision Forced-Air Drying Oven (300°C)

Overview

The Labonce Labonce-145JMH Precision Forced-Air Drying Oven is an industrial-grade, benchtop-to-floor-standing laboratory drying system engineered for thermal stability, uniform heat distribution, and long-term operational reliability in quality control, materials testing, and R&D environments. Operating on the principle of forced convection—where a calibrated axial fan circulates heated air through a precisely engineered duct system—the oven ensures consistent thermal exposure across the entire chamber volume. Designed for applications requiring sustained temperatures up to 300°C, it meets the fundamental thermal conditioning requirements of ASTM D1654 (corrosion testing), ISO 17025-accredited calibration workflows, and internal GLP-compliant stability studies. Its robust mechanical architecture, combined with dual-layer insulation and SUS304 stainless steel interior construction, minimizes thermal loss and resists corrosion from residual solvents, moisture, or acidic volatiles commonly encountered during sample drying, pre-conditioning, or moisture content determination.

Key Features

• Optimized Airflow Dynamics: A proprietary multi-directional air duct system ensures laminar, high-velocity airflow across all shelf levels—reducing temperature gradients and delivering ≤±3.0°C uniformity at 200°C and ≤±4.0°C at 300°C per IEC 60068-3-5.
• Dual-Layer Thermal Insulation: High-density mineral fiber insulation (≥80 mm thick) between outer casing and inner chamber suppresses surface temperature rise and improves energy efficiency during extended dwell cycles.
• Stainless Steel Chamber: Fully welded SUS304 interior—electropolished finish option available—resists oxidation, facilitates cleaning, and complies with USP material compatibility guidelines for pharmaceutical drying validation.
• Digital PID Temperature Control: Microprocessor-based controller with real-time setpoint tracking, ramp-soak programming (up to 10 segments), and auto-tuning capability for stable thermal regulation under variable load conditions.
• Independent Over-Temperature Protection: Redundant safety circuit with mechanical cut-off switch (non-resettable at >320°C) operates independently from the main controller—certified per EN 61000-6-2 EMC and EN 61000-6-3 emission standards.
• Modular Shelf Configuration: Two adjustable stainless steel shelves included; additional shelves (max. 8 total) can be installed without tools—compatible with standard labware up to Ø200 mm diameter or 150 mm height.

Sample Compatibility & Compliance

The Labonce-145JMH accommodates a broad range of sample formats—including Petri dishes, crucibles, glass desiccators, polymer pellets, metal coupons, and coated substrates—without compromising thermal homogeneity. Its chamber geometry supports simultaneous processing of multiple ASTM G154-cycle specimens or ISO 4892-2 UV-exposed samples post-drying. The unit conforms to key regulatory frameworks applicable to laboratory thermal equipment: design and documentation align with ISO/IEC 17025:2017 Clause 6.4 (equipment verification), and its temperature performance is verifiable using NIST-traceable Class A PT100 probes per EURAMET cg-18. While not FDA 21 CFR Part 11–validated out-of-the-box, the controller’s audit trail-ready firmware (v3.2+) supports integration into validated systems where electronic records are required.

Software & Data Management

The Labonce-145JMH features an RS485 serial interface (Modbus RTU protocol) for bidirectional communication with external SCADA, LIMS, or MES platforms. Optional Labonce DataLogger Pro software (Windows-based) enables continuous temperature logging at user-defined intervals (1–60 sec), real-time graphing, deviation alerts via email/SMS, and export to CSV/PDF for 21 CFR Part 11–compliant archiving when paired with time-stamped digital signatures. All logged data includes metadata: operator ID, batch number, chamber sensor ID, and environmental ambient reference (via optional external thermohygrometer input).

Applications

• Moisture content analysis per AOAC 950.46 and ISO 5517 in food, feed, and agricultural commodities
• Pre-drying of filter papers and gravimetric sampling media prior to particulate mass determination (EPA Method 201A)
• Thermal aging of elastomers and composites per ASTM D573 and ISO 188
• Baking and curing of printed circuit board (PCB) solder masks and conformal coatings
• Residual solvent removal from pharmaceutical intermediates under ICH Q5C stability protocols
• Conditioning of reference standards and calibration artifacts prior to metrological evaluation

FAQ

What is the maximum recommended operating temperature for continuous use?
Continuous operation is rated up to 280°C; short-term excursions to 300°C are permissible for ≤2 hours per cycle.
Can the oven be validated for IQ/OQ/PQ protocols?
Yes—documentation package includes factory calibration certificate (NIST-traceable), dimensional drawings, electrical schematics, and FAT report; IQ/OQ templates available upon request.
Is the chamber pressure-rated or vacuum-compatible?
No—the Labonce-145JMH is a standard atmospheric-pressure convection oven; vacuum or inert-gas purge modifications require custom engineering.
How often does the temperature sensor require recalibration?
Annual calibration is recommended per ISO/IEC 17025; field verification using a portable dry-block calibrator is supported via the controller’s sensor offset adjustment function.
Are replacement parts such as fans, heaters, or controllers available separately?
Yes—all major subassemblies—including EC axial fans, NiCr heating elements, and PID controller modules—are stocked and shipped globally with full technical documentation.