Shanghai Youyi DHG-9145A Precision Forced-Air Laboratory Drying Oven (300 °C)

Overview

The Shanghai Youyi DHG-9145A is a precision forced-air laboratory drying oven engineered for consistent thermal processing across research, quality control, and production environments. It operates on the principle of convection-driven heat transfer, utilizing a rear-mounted adjustable blower and optimized airflow ducting to ensure uniform temperature distribution throughout the stainless steel chamber. Designed to meet GB/T 30435–2013 standards for electric heating drying ovens, the DHG-9145A delivers stable thermal performance from ambient +20 °C up to 300 °C — suitable for drying, baking, sterilization, polymer curing, moisture loss analysis, and pre-conditioning of samples prior to analytical testing. Its robust architecture integrates microprocessor-based temperature regulation with real-time monitoring, making it appropriate for GLP-compliant workflows where traceability and repeatability are critical.

Key Features

• Microcomputer-controlled PID temperature regulation with 0.1 °C resolution and ±1 °C fluctuation tolerance under no-load conditions
• Mirror-finish SUS304 stainless steel interior chamber (550 × 450 × 550 mm), corrosion-resistant and easy to clean
• Double-layer tempered glass observation window with silicone-sealed door gasket rated for continuous operation at 300 °C
• Forced-air circulation system featuring rear-mounted fan with directional air ducts, enabling ±2.5% temperature uniformity (measured at 100 °C per GB/T 30435)
• Auto-ventilation design with rear-mounted intake and exhaust ports to passively remove condensate and residual volatiles without manual damper adjustment
• Intelligent power recovery function: retains set parameters after unexpected power interruption and resumes operation upon restoration
• LCD menu-driven interface displaying setpoint, real-time chamber temperature, elapsed time, and remaining hold duration simultaneously
• Independent over-temperature cut-off circuit (optional) compliant with IEC 61000-4-5 surge immunity requirements for lab safety

Sample Compatibility & Compliance

The DHG-9145A accommodates a broad range of sample types including biological specimens, pharmaceutical excipients, polymer films, ceramic powders, electronic components, and metal coatings. Its inert stainless steel chamber and absence of catalytic surfaces prevent cross-contamination during thermal treatment. The unit conforms to GB/T 30435–2013, which defines performance criteria for electric heating drying ovens used in scientific and industrial laboratories. While not certified to ISO/IEC 17025 or ASTM E145, its documented temperature stability, uniformity, and programmable timing align with common validation protocols for equipment qualification (IQ/OQ/PQ) in regulated environments. Optional RS485 communication enables integration into centralized environmental monitoring systems supporting FDA 21 CFR Part 11 audit trail requirements when paired with compliant software.

Software & Data Management

The standard configuration includes local parameter logging via the onboard LCD display and timer. For enhanced data integrity, optional accessories expand connectivity and traceability: an RS485 port supports Modbus RTU protocol for integration with SCADA or LIMS platforms; an embedded thermal printer provides hard-copy records of temperature profiles and cycle completion timestamps; and a multi-segment programmable controller allows up to 30 ramp-hold steps for complex thermal protocols. All optional modules are designed for plug-and-play installation without firmware modification. Data export functionality supports CSV-formatted output compatible with Excel, MATLAB, and statistical process control (SPC) tools used in QA/QC labs.

Applications

• Drying of moisture-sensitive reagents and reference standards prior to gravimetric analysis (e.g., ASTM D2240, USP <645>)
• Baking of filter papers, crucibles, and glassware in preparation for ash content determination (AOAC 923.03)
• Thermal stabilization of calibration weights and dimensional metrology fixtures
• Curing of epoxy-coated substrates and printed circuit board assemblies
• Pre-heating of test specimens for tensile, impact, and hardness testing per ISO 291 and ASTM D618
• Depyrogenation of glass vials and stainless steel components in pharmaceutical manufacturing support areas
• Accelerated aging studies of packaging materials under controlled thermal stress (ASTM F1980)

FAQ

What is the maximum allowable operating temperature, and how is thermal safety ensured?
The DHG-9145A is rated for continuous operation up to 300 °C. A dual-protection system includes primary PID-controlled heating and an independent mechanical over-temperature limiter (optional) that interrupts power if chamber temperature exceeds user-defined thresholds.

Can this oven be validated for use in GMP-regulated environments?
Yes — while the base unit is not pre-certified, its documented temperature uniformity, stability, and optional data logging features support IQ/OQ/PQ execution per Annex 15 and EU GMP guidelines. Calibration certificates for PT100 sensors and NIST-traceable thermocouples can be supplied upon request.

Is inert atmosphere operation supported?
An optional inert gas inlet kit (with needle valve and rotameter) allows nitrogen or argon purging to suppress oxidation during heat treatment of sensitive alloys or battery electrode materials.

How many adjustable shelves does the chamber include, and what is their load capacity?
Two chrome-plated steel wire shelves are included as standard, each rated for 15 kg distributed load. Additional shelves and reinforced trays are available as accessories.

Does the oven comply with electromagnetic compatibility (EMC) standards for laboratory use?
The DHG-9145A meets GB/T 18268.1–2010 (equivalent to IEC 61326-1), ensuring reliable operation in shared lab spaces with sensitive instrumentation such as balances, spectrometers, and chromatographs.