GLTlab HA-1 7-Inch Ceramic-Coated Aluminum Hotplate Magnetic Stirrer

Overview

The GLTlab HA-1 is a precision-engineered 7-inch hotplate magnetic stirrer designed for reproducible heating and mixing in routine laboratory workflows. It operates on the principle of electromagnetic induction to drive magnetic stir bars within vessels while simultaneously delivering uniform conductive heating via a ceramic-coated aluminum plate. Unlike conventional hotplates with limited thermal feedback, the HA-1 integrates a high-accuracy PT1000 external temperature probe input—enabling closed-loop solution temperature control rather than relying solely on surface temperature estimation. This architecture ensures that the setpoint reflects actual sample temperature under dynamic stirring conditions, significantly improving process fidelity in applications such as buffer preparation, reagent dissolution, enzymatic reactions, and pre-analytical sample conditioning. Its dual-range capability—plate surface up to 400 °C and solution up to 200 °C—is optimized for both rapid solvent evaporation and gentle, stable incubation across diverse chemical and biological matrices.

Key Features

• Ceramic-coated aluminum heating surface (230 × 230 mm) offering excellent thermal conductivity, corrosion resistance, and mechanical durability against accidental spills or abrasion
• Independent digital LED display with dual-parameter readout: real-time solution temperature (via external PT1000 probe) and setpoint, with 0.1 °C resolution for precise thermal programming
• Intelligent thermal management system maintaining ±1 °C stability over time and across load variations, validated per ISO 17025 traceable protocols
• External probe calibration function supporting user-initiated offset correction to maintain long-term accuracy under changing ambient or vessel geometry conditions
• Universal power supply (100–130 V / 200–240 V, 50/60 Hz) compliant with IEC 61010-1 safety standards for laboratory electrical equipment
• IP21-rated enclosure providing protection against vertically falling drips and solid objects ≥12.5 mm—suitable for general-purpose lab benches but not wet-process environments

Sample Compatibility & Compliance

The HA-1 accommodates standard laboratory glassware including beakers (up to 1000 mL), Erlenmeyer flasks (up to 2000 mL), and cylindrical reaction vessels placed directly on the heated surface. Its single-stir position design ensures optimal coupling between the internal magnet array and standard PTFE- or glass-coated stir bars (6–8 cm length recommended). The unit complies with key international laboratory equipment directives: electromagnetic compatibility per EN 61326-1, electrical safety per EN 61010-1, and RoHS 2011/65/EU material restrictions. While not certified for GMP manufacturing environments, its temperature logging capability (when paired with compatible data acquisition systems) supports GLP-aligned documentation requirements for method validation and equipment qualification.

Software & Data Management

The HA-1 operates as a standalone analog-digital hybrid instrument without embedded firmware or USB/Bluetooth connectivity. However, its analog voltage output (0–10 V) for external PT1000 signal enables integration into third-party data acquisition platforms—including LabVIEW, MATLAB, or custom SCADA systems—for time-stamped temperature logging and alarm triggering. When used in regulated environments, users may implement manual audit trails per FDA 21 CFR Part 11 guidelines by recording setpoints, observed temperatures, and calibration events in bound logbooks or validated electronic lab notebooks (ELNs). The external probe calibration feature facilitates periodic verification consistent with ISO/IEC 17025 clause 6.4.10 on measurement traceability.

Applications

• Preparation of homogeneous aqueous and organic solutions in QC/QA laboratories (e.g., pH buffer standardization, titrant dilution)
• Controlled thermal activation of catalysts or crosslinking agents in polymer synthesis workflows
• Stabilization of enzyme-containing buffers prior to HPLC or ELISA assay setup
• Accelerated solubility testing per USP guidelines using standardized vessel geometry and agitation rate
• Supporting ASTM D2196 viscosity measurements where constant bath temperature is required during rotational analysis

FAQ

Can the HA-1 be used for reflux setups?
Yes—when paired with appropriate condensers and heat-resistant glassware, the HA-1’s stable 200 °C solution control enables reliable low-boiling-point reflux (e.g., ethanol, acetone). Ensure adequate ventilation and avoid exceeding 80% of the vessel’s nominal capacity.
Is the PT1000 probe included with the unit?
No—the HA-1 accepts industry-standard 2-wire or 3-wire PT1000 sensors (not supplied); users must select probes rated for immersion in their target solvents and compatible with 0–10 V analog input scaling.
Does the unit support programmable ramp-soak temperature profiles?
No—it provides only manual setpoint control. For multi-stage thermal protocols, integration with external PID controllers or programmable data loggers is required.
What maintenance is required to ensure long-term accuracy?
Annual verification of PT1000 probe response using NIST-traceable reference baths is recommended. Clean the ceramic surface regularly with non-abrasive, pH-neutral cleaners; avoid halogenated solvents that may degrade coating integrity over time.