Shanghai RightOne DHG-9078A High-Temperature Forced-Air Drying Oven (400 °C)

Overview

The Shanghai RightOne DHG-9078A is a precision-engineered high-temperature forced-air drying oven designed for demanding thermal processing applications in industrial R&D, quality control, and academic laboratories. Operating across a calibrated temperature range from ambient +20 °C up to 400 °C, it employs convection-based heat transfer via a robust multi-blade centrifugal circulation system—ensuring rapid thermal response and stable thermal equilibrium. The oven’s architecture follows fundamental principles of convective heat transfer and thermal mass management: heated air is pre-mixed in an insulated preheating chamber before entering the working zone, minimizing thermal gradients and supporting ISO 17025-compliant uniformity performance (±2.5% at 100 °C, empty load). Its stainless steel (SUS304) interior, ceramic rope door gasket, and high-density glass fiber insulation collectively minimize thermal leakage and support long-term operational stability under sustained high-temperature conditions.

Key Features

• Microprocessor-based PID temperature controller with 4.3-inch TFT LCD touchscreen interface—supporting real-time display of setpoint, actual chamber temperature, elapsed time, and remaining timer duration.
• Auto-tuning function and power suppression algorithm ensure precise thermal regulation and reduced overshoot during ramp-up or setpoint changes.
• Preheating cavity design enables rapid thermal equilibration and improved spatial temperature uniformity across the 70 L working volume.
• Double-layer ceramic rope door seal rated for continuous operation at 400 °C—resistant to thermal degradation and maintaining integrity over extended service life.
• Adjustable stainless steel shelving (2 standard trays included) with press-fit hinge latches and reinforced cold-rolled steel outer casing finished with electrostatic epoxy powder coating.
• Independent over-temperature cut-off circuit (optional) compliant with IEC 61000-4-2 and EN 60519-2 safety standards—automatically de-energizes heating elements upon exceeding user-defined safety limit.
• Power-fail recovery mode retains programmed parameters and resumes operation upon power restoration, preserving experimental continuity and data integrity.

Sample Compatibility & Compliance

The DHG-9078A accommodates a broad spectrum of non-volatile, thermally stable samples—including polymer pellets, metal oxide powders, ceramic green bodies, catalyst substrates, and coated electronic components. It is not intended for flammable solvents, volatile organics, or biological specimens requiring sterile environments. The unit meets general-purpose laboratory equipment requirements per GB/T 28850–2012 (Chinese national standard for electric heating ovens) and aligns with structural and electrical safety expectations outlined in UL 61010-1 and IEC 61010-1. While not certified to FDA 21 CFR Part 11 out-of-the-box, its optional RS485 interface supports integration into validated systems where audit trail and electronic record functionality are implemented at the host software level per ALCOA+ principles.

Software & Data Management

The embedded controller supports time-stamped temperature logging internally (up to 10,000 data points), viewable directly on-screen or exportable via optional RS485 communication port using Modbus RTU protocol. When paired with supplied PC software (Windows-compatible), users can configure multi-step thermal profiles, generate CSV-formatted reports, and apply basic statistical analysis (min/max/mean deviation). Optional embedded thermal printer provides hard-copy output of real-time temperature traces and event logs—useful for GLP-aligned documentation workflows. All optional peripherals—including the intelligent programmable controller (±0.5 °C accuracy, 30-segment ramp-soak capability)—are factory-calibrated and traceable to CNAS-accredited reference standards.

Applications

• Thermal aging studies of elastomers, composites, and insulating materials per ASTM D573 and ISO 188.
• Drying and moisture removal from refractory raw materials prior to sintering or XRD analysis.
• Curing of epoxy, silicone, and polyimide coatings on PCBs and aerospace components.
• Heat treatment of calibration standards, reference weights, and metrology fixtures.
• Pre-conditioning of filters, membranes, and absorbent media for gravimetric particulate analysis (e.g., EPA Method 201A).
• Stabilization annealing of metal alloys and sintered ceramics in metallurgical process development.

FAQ

What is the maximum continuous operating temperature of the DHG-9078A?
The chamber is rated for continuous operation at 400 °C; however, prolonged use above 350 °C may accelerate aging of insulation and door gasket—recommended duty cycle should not exceed 8 hours/day at full rating.
Is the temperature uniformity verified at elevated setpoints?
Uniformity testing per GB/T 28850–2012 is performed at 100 °C (±2.5%). At higher temperatures (e.g., 300 °C), typical deviation remains within ±3.0 °C across nine-point mapping in empty chamber conditions.
Can this oven be integrated into a centralized lab monitoring network?
Yes—via optional RS485 interface and Modbus RTU protocol, enabling connection to SCADA platforms, LIMS, or custom Python/Node-RED automation scripts.
Does the unit include NIST-traceable calibration documentation?
Factory calibration certificate (as-found/as-left) is provided with each shipment; full NIST-traceable calibration with uncertainty budget requires third-party service—available upon request.
Are custom internal configurations available?
Shanghai RightOne offers OEM and non-standard modifications including modified shelving layouts, additional test ports (25 mm or 50 mm diameter), inert gas purge fittings, and enhanced insulation for ultra-low heat loss applications.