Hanuo GX-2020 High-Temperature Circulating Oil Bath

Overview

The Hanuo GX-2020 High-Temperature Circulating Oil Bath is a precision-engineered thermal management system designed for demanding laboratory and pilot-scale applications requiring stable, uniform heating up to 300 °C. Unlike standard water baths, this unit operates with either heat-transfer oil or water—enabling extended temperature operation beyond the boiling point of water while maintaining thermal homogeneity across the bath chamber and external process loops. Its core function relies on forced convection via an integrated high-flow external circulation pump, delivering consistent thermal energy to jacketed reactors, distillation columns, semiconductor wafer processing fixtures, and other externally coupled thermal loads. The system employs a robust stainless steel bath tank and a closed-loop PID control architecture to minimize thermal overshoot and ensure long-term stability under variable load conditions.

Key Features

• Wide operational range from ambient temperature to 300 °C, compatible with both water and high-boiling-point silicone or mineral oils
• Stainless steel working chamber (280 × 250 × 280 mm, depth 280 mm) offering superior corrosion resistance and mechanical durability in aggressive chemical environments
• High-capacity external recirculation pump delivering up to 15 L/min flow rate, optimized for efficient heat transfer to external equipment with low-pressure drop
• PID-based digital temperature controller with dual LED display showing real-time bath temperature and user-defined setpoint simultaneously
• Tactile membrane keypad interface with intuitive navigation, supporting precise setpoint adjustment in 0.1 °C increments
• Optional cold-water inlet port enables rapid active cooling during exothermic reactions—eliminating reliance on external chillers for moderate temperature reduction
• Thermal insulation design minimizes surface temperature rise and improves energy efficiency during prolonged high-temperature operation

Sample Compatibility & Compliance

The GX-2020 is suitable for use with glass, stainless steel, and PTFE-lined reaction vessels, condensers, reflux apparatus, and jacketed bioreactors. Its external circulation architecture supports integration into GMP-compliant pilot plants when paired with validated temperature mapping protocols. While not certified to ISO/IEC 17025 as a standalone metrological instrument, the system meets general laboratory equipment requirements per ISO 14644-1 (cleanroom compatibility), ASTM E2251 (liquid-bath calibration practices), and USP (thermal validation of controlled-temperature systems). Temperature stability of ±0.2 °C at setpoints ≥200 °C is verified under steady-state loading conditions using traceable Pt100 reference probes.

Software & Data Management

The GX-2020 operates as a standalone analog-digital hybrid controller without embedded data logging or network connectivity. However, its analog 0–10 V or 4–20 mA output signal (optional configuration) permits integration into centralized SCADA or LIMS platforms for remote monitoring and alarm triggering. For regulatory environments requiring audit trails—such as pharmaceutical QC labs operating under FDA 21 CFR Part 11—the unit may be operated within a documented procedural framework where manual log entries are supplemented by external calibrated dataloggers. Firmware updates are not supported; all calibration and performance verification must be performed using external reference standards.

Applications

• Temperature control of jacketed laboratory reactors during high-temperature synthesis (e.g., Friedel-Crafts acylation, transesterification, polymerization)
• Heating source for vacuum distillation and short-path distillation systems operating above 150 °C
• Thermal conditioning of semiconductor wafer chucks and optical alignment stages in R&D cleanrooms
• Calibration of high-temperature sensors, thermocouples, and RTDs across the 50–300 °C range
• Accelerated aging studies of elastomers, composites, and encapsulant materials per ASTM D573 and ISO 188
• Supporting crystallization kinetics experiments requiring precise ramp-and-hold thermal profiles

FAQ

What types of heat-transfer fluids are compatible with the GX-2020?
Silicone oils (e.g., Dow Corning 200 Fluid series), mineral oils (e.g., Marlotherm SH), and polyalkylene glycols are commonly used. Avoid ethylene glycol–water mixtures above 120 °C due to degradation risk.
Can the GX-2020 maintain temperature under continuous external load?
Yes—its 15 L/min pump and 3 kW heater enable stable operation with typical external heat losses up to 2.5 kW, provided tubing diameter and loop length remain within manufacturer-recommended limits.
Is the unit suitable for GLP-regulated environments?
It can be deployed in GLP workflows when accompanied by documented calibration records, routine performance verification, and procedural controls for temperature deviation reporting.
Does the GX-2020 include overtemperature protection?
Yes—a redundant mechanical safety thermostat cuts power if internal temperature exceeds 320 °C, independent of the main PID controller.
How often should the circulating fluid be replaced?
For silicone oil under continuous 250 °C operation, replacement is recommended every 6–12 months; visual inspection for discoloration or viscosity change should guide maintenance intervals.