Hanuo 202-0EBS Electrothermal Constant-Temperature Drying Oven

Overview

The Hanuo 202-0EBS Electrothermal Constant-Temperature Drying Oven is a precision-engineered laboratory drying system designed for routine thermal processing tasks in industrial quality control, pharmaceutical R&D, academic research, and clinical support laboratories. Operating on the principle of forced-air convection, the oven maintains stable thermal conditions across its galvanized steel chamber through a horizontally mounted axial fan and strategically positioned heating elements—ensuring uniform heat distribution and minimizing vertical temperature gradients. Unlike natural-convection ovens, this model delivers improved reproducibility for drying, baking, sterilization, wax melting, and polymer curing applications where consistent thermal exposure is critical to process validation and material integrity.

Key Features

• Galvanized steel inner chamber construction provides corrosion resistance under repeated thermal cycling and low-humidity drying environments.
• Electrostatically coated exterior housing ensures mechanical durability and long-term aesthetic retention in shared lab spaces.
• Double-layer tempered glass observation window enables real-time visual monitoring of samples without interrupting thermal equilibrium or compromising safety.
• Microprocessor-based digital temperature controller with PID algorithm delivers stable setpoint maintenance within ±2°C tolerance across the full operating range (RT +10°C to 250°C).
• Forced-air circulation system achieves rapid heat-up times and enhances drying efficiency for hygroscopic or solvent-laden specimens.
• Over-temperature protection circuit automatically cuts power if internal temperature exceeds user-defined safety limits—compliant with IEC 61010-1 requirements for laboratory electrical equipment safety.

Sample Compatibility & Compliance

The 202-0EBS accommodates standard laboratory glassware (e.g., Petri dishes, weighing boats, crucibles), metal trays, and polymer-based containers compatible with temperatures up to 250°C. Its design supports common regulatory workflows including moisture content determination per ASTM E1218, residual solvent removal in pharmaceutical intermediates (ICH Q5C), and pre-sterilization conditioning of reusable surgical instruments (ISO 17664). While not certified for Class II biological safety or explosion-proof operation, the unit meets general-purpose lab equipment standards under GB/T 23797–2009 (Chinese national standard for electric heating ovens) and incorporates grounding continuity, insulation resistance, and dielectric strength testing per IEC 61010-1:2010.

Software & Data Management

This analog-digital hybrid model features a front-panel digital display and push-button interface with no embedded data logging or remote connectivity. All operational parameters—including set temperature, elapsed time, and status indicators—are manually recorded by users. For GLP/GMP-aligned environments requiring audit trails, external USB or RS-232 data loggers may be integrated via the optional analog output port (0–5 V DC proportional to chamber temperature). The absence of networked firmware eliminates cybersecurity concerns while preserving compatibility with legacy LIMS platforms that accept analog input signals. Calibration verification follows standard practices using NIST-traceable PT100 probe thermometers at three spatial points (center, top rear, bottom front) per ISO/IEC 17025:2017 clause 6.4.10.

Applications

• Drying of soil, grain, textile, and ceramic samples prior to gravimetric analysis.
• Baking of filter papers, silica gel desiccants, and chromatography plates.
• Sterilization of non-critical lab tools and glassware at 160°C for 2 hours (dry-heat method per USP <1211>).
• Melting and solidification studies of paraffin, beeswax, and polymer blends.
• Curing of epoxy coatings, adhesives, and printed circuit board substrates.
• Pre-conditioning of humidity-sensitive sensors and reference standards before metrological evaluation.

FAQ

Is the 202-0EBS suitable for sterilizing medical devices?
Yes—when operated at ≥160°C for ≥120 minutes, it complies with dry-heat sterilization protocols outlined in USP <1211> and ISO 15883-1 for non-porous, heat-stable items. Biological indicators (e.g., Bacillus atrophaeus spores) must be used to validate lethality.
Can stainless steel interior be specified?
The “B” suffix in Hanuo’s 202 series denotes stainless steel chamber construction; the 202-0EBS uses galvanized steel. Models such as 202-1ES-B offer 304 stainless steel interiors for enhanced corrosion resistance in high-salinity or acidic sample environments.
Does the oven support programmable ramp-soak cycles?
No—the 202-0EBS employs a single-setpoint digital controller without multi-step programming capability. For time-dependent thermal profiles, consider Hanuo’s 202-C series with intelligent controllers supporting up to 8 segments.
What maintenance is required for long-term reliability?
Monthly inspection of door gasket integrity, quarterly cleaning of air intake grilles and fan housing, and annual calibration of the temperature sensor using a traceable reference thermometer are recommended per manufacturer guidelines.
Is CE or UL certification available for export?
The base 202-0EBS model is supplied without CE marking or UL listing. Custom configurations with EN 61010-1-compliant components and third-party notified body assessment can be arranged upon request for EU or North American markets.