Shanghai Youyi GRX-9073A Forced-Air Hot Air Sterilization Oven

Overview

The Shanghai Youyi GRX-9073A Forced-Air Hot Air Sterilization Oven is a precision-engineered laboratory-grade dry heat sterilizer and drying oven designed for reliable thermal decontamination, moisture removal, and heat-stable material conditioning. It operates on the principle of convective dry heat sterilization—utilizing forced circulation of heated air to achieve microbial inactivation through oxidative damage to cellular components, protein denaturation, and electrolyte imbalance. Unlike moist heat methods (e.g., autoclaving), dry heat is essential for sterilizing items that are heat-stable but moisture-sensitive or non-penetrable by steam—including glassware, metal instruments, powders, oils, and anhydrous reagents. The GRX-9073A delivers consistent thermal performance across its full operating range (RT+10°C to 250°C), meeting foundational requirements for ISO 17665-1 (sterilization process validation) and supporting GLP-compliant workflows where documentation of thermal exposure is critical.

Key Features

• Forced-air convection system with axial fan and optimized ducting ensures rapid heating and uniform temperature distribution (±2.5% uniformity) throughout the 70 L stainless steel chamber (450 × 400 × 450 mm).
• Microprocessor-based PID temperature controller with 0.1°C resolution and ±1°C fluctuation tolerance enables precise setpoint maintenance under variable load conditions.
• LCD menu-driven interface displays real-time chamber temperature, set temperature, elapsed time, and remaining hold time—all simultaneously on a single screen.
• Dual safety architecture: primary control loop with programmable over-temperature alarm, plus independent mechanical high-limit cut-off that interrupts power if chamber temperature exceeds user-defined threshold.
• Robust construction includes cold-rolled steel exterior with electrostatic powder coating, mirror-finish 304 stainless steel interior, and high-temperature silicone door gasket rated to 300°C for long-term sealing integrity.
• Large double-layer tempered glass observation window allows continuous visual monitoring without compromising thermal stability or operator safety.
• Power-fail recovery function retains all parameter settings—including timer values and temperature profiles—ensuring process continuity after unexpected interruptions.

Sample Compatibility & Compliance

The GRX-9073A is validated for use with heat-resistant laboratory consumables and equipment including borosilicate glassware, stainless steel surgical tools, ceramic filters, and desiccated pharmaceutical excipients. It complies with core functional requirements outlined in ASTM E1114 (Standard Practice for Dry Heat Sterilization of Medical Devices) and supports validation protocols aligned with ISO 13485 and EU Annex 1 (for sterile manufacturing environments). While not certified to IEC 61010-1 out-of-the-box, its design incorporates Class II insulation, earthed chassis, and overcurrent protection suitable for standard laboratory electrical infrastructure (AC 220 V, 50 Hz). For regulated environments, optional accessories—including RS485 communication module with traceable data logging software and embedded thermal printer—enable compliance with FDA 21 CFR Part 11 audit trail requirements.

Software & Data Management

The base unit operates via embedded firmware with no external PC dependency. Optional RS485 interface (available as add-on) enables bidirectional communication with host systems using Modbus RTU protocol, facilitating integration into centralized lab management platforms (e.g., LabVantage, STARLIMS). The companion software provides time-stamped temperature logging, exportable CSV reports, and configurable alarm notifications. When paired with the optional multi-segment programmable controller, users can define up to 30 temperature ramps and holds—ideal for complex thermal cycling applications such as ash content determination (AOAC 923.03) or residual solvent profiling per USP . All optional peripherals are CE-marked and supplied with calibration certificates traceable to NIM (National Institute of Metrology, China).

Applications

• Sterilization of reusable glassware, pipettes, Petri dishes, and metal instruments prior to aseptic processing.
• Drying of moisture-sensitive standards, reference materials, and hygroscopic chemicals without hydrolytic degradation.
• Heat treatment of silica gel, molecular sieves, and catalyst supports to restore adsorption capacity.
• Pre- and post-weighing desiccation of samples for gravimetric analysis (e.g., loss-on-drying per USP ).
• Thermal aging studies of polymers, coatings, and electronic components under controlled dry heat exposure.
• Depyrogenation of glass vials and stoppers in pharmaceutical packaging lines (validated at ≥250°C for ≥30 min).

FAQ

What is the maximum validated sterilization temperature for this model?

The GRX-9073A is rated for continuous operation up to 250°C, which satisfies standard depyrogenation cycles (e.g., 250°C for 45 minutes) per USP and ISO 15883-5.
Can the oven be used for biological indicator validation?

Yes—when operated with calibrated thermocouples placed at multiple chamber locations, it supports BI challenge testing using Geobacillus stearothermophilus spores on stainless steel carriers, per ISO 11138-3.
Is the stainless steel interior electropolished?

No—the interior uses standard mirror-finish 304 stainless steel, suitable for routine cleaning with ethanol or neutral detergents; electropolishing is available upon special request.
Does the unit include a calibration certificate?

Factory calibration is performed at three points (100°C, 160°C, 250°C) using NIST-traceable reference thermometers; a summary report is included. Full ISO/IEC 17025 calibration is available as a service option.
How many shelves are included, and are they adjustable?

Two chrome-plated wire shelves are supplied, both fully height-adjustable on notched support rods to accommodate varied load configurations.