The Great Wall HWCL-1 Integrated Heating Magnetic Stirring Bath

Overview

The Great Wall HWCL-1 Integrated Heating Magnetic Stirring Bath is an engineered solution for precise temperature-controlled mixing in laboratory-scale chemical synthesis, material dispersion, and thermal reaction studies. Unlike conventional hotplate stirrers or separate water/oil baths, the HWCL-1 integrates a thermostatically regulated heating bath with an internal magnetic stirring mechanism—enabling simultaneous uniform heating and mechanical agitation of samples contained within vessels immersed in the bath medium. Its operation relies on convective heat transfer through thermally stable bath fluids (e.g., silicone oil or water), while a submerged magnetic coupling system transfers rotational torque from a brushless DC motor to a PTFE-coated stir bar inside the sample vessel. This dual-function architecture eliminates thermal gradients across the vessel wall and ensures reproducible kinetic conditions—critical for reaction optimization, solubility testing, and polymerization protocols requiring tight thermal and mixing control.

Key Features

• Integrated design combining high-precision PID temperature regulation and magnetic stirring in a single compact unit
• Brushless DC motor drive ensures low noise, long service life, and maintenance-free continuous operation
• High-temperature resistant permanent magnet assembly retains magnetic strength up to 200 °C, enabling stable stirring performance under extended oil-bath conditions
• Dual-mode temperature control: optimized ranges for water bath (RT +5 to 95 °C) and oil bath (RT +5 to 200 °C), with ±1 °C stability at setpoint
• Intuitive front-panel interface with keypad input and LED digital display for independent setting of temperature and speed
• Robust safety architecture including overcurrent protection, ground-fault detection, and independent overtemperature cutoff
• Compact footprint (190 × 200 × 490 mm) and lightweight construction (4 kg net) support benchtop deployment in fume hoods or confined lab spaces

Sample Compatibility & Compliance

The HWCL-1 accommodates standard laboratory glassware up to 500 mL capacity—including round-bottom flasks, beakers, and jacketed reactors—when placed within its 1.5 L cylindrical bath reservoir (Ø145 × 104 mm). Compatible bath media include deionized water, glycerol, silicone oils (e.g., Dow Corning 200 Fluid), and other non-corrosive, thermally stable liquids with flash points exceeding operational temperatures. The unit complies with IEC 61010-1:2010 safety requirements for electrical equipment used in laboratory environments. While not certified to GLP or GMP standards out-of-the-box, its PID-based temperature control, digital logging readiness (via optional analog output), and repeatable thermal/mixing profiles support method validation under ISO/IEC 17025-accredited quality systems. Users performing regulated work (e.g., USP , ASTM E2912) may integrate the HWCL-1 into documented SOPs with appropriate calibration traceability to NIST-traceable thermometers and tachometers.

Software & Data Management

The HWCL-1 operates as a standalone analog-controlled instrument with no embedded firmware or network connectivity. All parameter inputs and real-time status (temperature, speed) are managed via physical controls and LED readouts. For laboratories requiring electronic data capture, optional analog voltage outputs (0–5 V or 0–10 V) can be interfaced with third-party data acquisition systems (e.g., LabVIEW, MATLAB, or PLC-based SCADA) to record time-stamped temperature and RPM traces. Calibration records—including verification of temperature accuracy per ASTM E77 and speed linearity per ISO 8573-1—should be maintained manually or within a validated ELN/LIMS platform. No FDA 21 CFR Part 11 compliance is provided natively; however, audit trails may be established externally when paired with compliant software infrastructure.

Applications

• Controlled-temperature synthesis of metal-organic frameworks (MOFs) and coordination polymers
• Viscosity-dependent dissolution testing of pharmaceutical excipients in aqueous or organic media
• Thermal curing of epoxy resins and UV-curable adhesives under agitated conditions
• Extraction efficiency studies using Soxhlet-compatible solvent reflux setups
• Enzyme kinetics assays requiring strict thermal homogeneity across multi-well plate adapters
• Polymer emulsification and nanoparticle dispersion in high-boiling-point solvents

FAQ

Can the HWCL-1 be used with corrosive bath fluids such as concentrated acids or halogenated solvents?
No. The stainless steel bath chamber and internal components are not chemically resistant to strong oxidizers, halogens, or low-pH solutions. Only inert, high-flash-point fluids approved for laboratory heating baths should be used.
Is external temperature probe input supported for improved accuracy?
The HWCL-1 uses an internal Pt100 sensor for closed-loop control and does not accept external probe inputs. For enhanced measurement fidelity, users should verify bath temperature independently using a calibrated immersion thermometer positioned adjacent to the sample vessel.
What maintenance is required for long-term reliability?
Routine cleaning of the bath chamber after each use, periodic inspection of the stir bar coupling alignment, and annual verification of temperature and speed calibration against traceable standards are recommended.
Does the unit support programmable ramp-and-soak temperature profiles?
No. The HWCL-1 provides only manual setpoint control without built-in programming capability. Multi-step thermal protocols require external timer or controller integration.
Can multiple vessels be stirred simultaneously in one bath?
Yes—provided total volume does not exceed 1.5 L and individual vessels remain fully immersed and spaced to avoid magnetic interference between stir bars.