Yoyi DHG-9145A Forced-Air Constant-Temperature Drying Oven

Overview

The Yoyi DHG-9145A is a microprocessor-controlled forced-air drying oven engineered for precision thermal processing in research laboratories, quality control environments, and industrial R&D settings. Operating on the principle of convection-driven heat transfer, it utilizes an optimized rear-mounted air circulation system with adjustable airflow dynamics to ensure rapid temperature stabilization and high spatial uniformity across the entire working chamber. Designed to meet the stringent requirements of GB/T 30435–2013 (Chinese National Standard for Electric Hot-Air Drying Ovens), this model delivers stable, repeatable thermal conditions from ambient +10°C up to 300°C—making it suitable for applications ranging from moisture removal and polymer curing to sterilization validation and pre-conditioning of electronic components.

Key Features

• Intelligent microcomputer PID temperature controller with real-time display of setpoint, actual chamber temperature, and remaining hold time on a backlit LCD interface
• Dual-layer tempered glass observation window with integrated seal, enabling non-intrusive visual monitoring without thermal disturbance
• High-efficiency horizontal airflow duct system with rear-mounted blower and automatic intake/exhaust ports to actively manage internal humidity and condensate accumulation
• Mirror-finish stainless steel interior chamber (304 grade) resistant to oxidation and corrosion; reinforced cold-rolled steel exterior with electrostatic epoxy coating
• Adjustable stainless steel shelving (2 standard trays included); optional third tray available upon request
• Programmable timer with 1–9999 minute range and auto-shutdown functionality; power-loss data retention with auto-restart capability
• Independent over-temperature cut-off protection circuit (optional) compliant with IEC 61000-4-2 for fail-safe operation
• Standard RS485 communication port (optional) supporting Modbus RTU protocol for integration into centralized lab management systems

Sample Compatibility & Compliance

The DHG-9145A accommodates a broad spectrum of sample types—including petri dishes, crucibles, glassware, PCB assemblies, granular powders, and coated substrates—without risk of cross-contamination or thermal degradation. Its inert atmosphere compatibility (via optional gas inlet port with calibrated float-type flowmeter) supports nitrogen or argon purging for oxygen-sensitive processes such as lithium battery electrode drying or catalyst activation. The unit conforms to GB/T 30435–2013 for performance verification under no-load conditions at 20°C ambient and 50% RH. While not certified to ISO/IEC 17025 or FDA 21 CFR Part 11 out-of-the-box, its architecture supports GLP/GMP-aligned documentation workflows when paired with validated external data loggers or printer modules.

Software & Data Management

The embedded controller records all operational parameters—including temperature setpoint, actual chamber reading, elapsed time, and alarm events—in non-volatile memory. Optional accessories extend traceability: an embedded thermal printer provides hard-copy output of temperature profiles; RS485 connectivity enables bidirectional communication with PC-based software for trend analysis, report generation, and audit-ready export (CSV/Excel). When configured with the optional multi-segment programmable controller, users can define up to 30 temperature ramps and holds—ideal for complex thermal protocols in materials science or pharmaceutical stability testing. All firmware updates are performed via secure USB interface, ensuring long-term maintainability.

Applications

This drying oven serves critical functions across multiple regulated and non-regulated domains: residual solvent evaporation in analytical sample preparation; gravimetric moisture content determination per ASTM D2216 and ISO 11465; pre-baking of solder paste and conformal coatings prior to reflow; thermal aging of elastomers and composites per ASTM D573; depyrogenation of glassware in cleanroom environments; and accelerated shelf-life testing of food packaging materials. Its robust construction and consistent thermal delivery make it particularly well-suited for routine QC labs requiring daily reproducibility and low-maintenance uptime.

FAQ

What is the maximum operating temperature and accuracy specification?
The DHG-9145A achieves a maximum setpoint of 300°C with a temperature fluctuation of ±1°C and uniformity of ±2.5% at 100°C (measured per GB/T 30435–2013 test methodology).
Can the oven be used for sterilization or depyrogenation?
Yes—when operated at ≥160°C for ≥2 hours, it meets common dry-heat sterilization criteria for glassware and metal instruments, though biological indicator validation is required for regulatory compliance.
Is calibration support provided?
The unit includes a factory calibration certificate traceable to national standards; users may perform field verification using NIST-traceable PT100 probes inserted through the optional 25 mm test port.
Are custom configurations available?
Yoyi offers OEM and non-standard modifications including extended temperature ranges, explosion-proof variants, larger chamber volumes, and specialized shelving layouts—subject to engineering review and lead-time confirmation.
Does the oven support remote monitoring or network integration?
Via the optional RS485 module and compatible SCADA software, real-time temperature logging, alarm notifications, and historical data retrieval are fully supported within existing lab infrastructure.