VWR Advanced Hot Plate with Magnetic Stirring Function

Overview

The VWR^® Advanced Hot Plate with Magnetic Stirring Function is a microprocessor-controlled laboratory heating platform engineered for precision temperature management and consistent sample agitation in general-purpose benchtop applications. Unlike basic hot plates, this integrated system combines resistive heating with a built-in magnetic stirrer—enabling simultaneous heating and mixing without external accessories. The unit operates on the principle of Joule heating via embedded resistance elements beneath a thermally stable top plate, while stirring is achieved through a rotating magnetic field generated by a brushless DC motor and permanent magnet array beneath the surface. Temperature regulation employs closed-loop feedback control using a high-stability thermistor or RTD sensor (depending on configuration), ensuring minimal thermal drift and repeatable set-point accuracy across extended operation cycles. Designed for integration into regulated environments—including GLP-compliant labs and quality control workflows—the hot plate meets fundamental electrical safety requirements per UL 61010-1 and IEC 61010-1, and supports documentation-ready operation when paired with validated temperature probes.

Key Features

• Microprocessor-based digital control system with front-facing LED display for real-time set-point and actual temperature readout
• Cool-touch, chemical-resistant polymer housing rated for continuous operation at elevated surface temperatures; surface remains safe to incidental contact during use
• Spill-resistant chassis design with integrated fluid channeling to divert liquids away from electronics and heating elements
• Low-profile form factor (10.9 cm height) optimized for fume hood compatibility and space-constrained workspaces
• Two top plate material options: reflective white ceramic (chemically inert, easy-clean, max 500°C) or anodized aluminum (mechanically robust, uniform heat distribution, max 400°C)
• Memory recall function retains last-used temperature setting after power cycling, reducing setup time between experiments
• Dual-status indicator: illuminated “HOT” symbol remains active until surface cools below 50°C, providing visual safety confirmation
• Standard 234 cm (92 in) three-wire grounded cord with NEMA 5-15P plug; 230 V / 50–60 Hz variants available upon request

Sample Compatibility & Compliance

This hot plate accommodates standard laboratory glassware including beakers, Erlenmeyer flasks, and round-bottom flasks up to 600 mL capacity (for model 97042-582). Its flat, dimensionally stable top plate ensures even thermal transfer and mechanical support for magnetic stir bars ranging from 15 mm to 40 mm in length. The unit is compatible with all common temperature probes (e.g., Pt100, thermocouple types J/K/T) via optional support rod and clamp kits (VWR Catalog No. 11301-110). From a regulatory standpoint, the device supports adherence to ASTM E2251 (Standard Specification for Laboratory Hot Plates), ISO/IEC 17025 clause 6.4.3 (equipment suitability), and FDA 21 CFR Part 11 when used with validated probe calibration records and electronic log entries. While not inherently 21 CFR Part 11 compliant as a standalone instrument, its deterministic behavior, stable output, and audit-ready operational parameters make it suitable for inclusion in computerized systems where data integrity controls are implemented at the software layer.

Software & Data Management

The VWR Advanced Hot Plate operates as a stand-alone analog-digital hybrid instrument with no embedded firmware update capability or USB/Ethernet connectivity. All operational parameters—including set temperature, elapsed time, and status indicators—are displayed locally via the LED interface. For traceable temperature monitoring, users integrate external calibrated probes connected to third-party data loggers (e.g., Omega OM-DAQPRO, Testo 176 T4) or LIMS-compatible acquisition systems. The unit’s consistent thermal response and low hysteresis enable reliable correlation between set-point values and measured probe readings over time—facilitating generation of calibration curves and uncertainty budgets per ISO/IEC 17025 requirements. Optional accessories such as the stainless steel support rod kit (11301-110) allow secure vertical positioning of probes within vessels, minimizing convection artifacts and improving measurement reproducibility.

Applications

• Heating and homogenizing reagent solutions prior to titration, spectroscopy, or chromatography sample preparation
• Controlled evaporation of solvents under gentle reflux conditions using condenser-equipped setups
• Pre-warming culture media, buffers, and enzymatic reaction mixtures in molecular biology and microbiology workflows
• Accelerated dissolution testing of pharmaceutical excipients and active ingredients per USP
• Thermal conditioning of polymer melts, adhesives, and coatings during formulation development
• Supporting ASTM D563–22 (Standard Test Method for Softening Point of Bitumen) when used with ring-and-ball apparatus

FAQ

Does this hot plate include a built-in stirrer motor?
Yes—the VWR Advanced Hot Plate models designated for magnetic stirring integrate a brushless DC drive motor and magnetic coupling system directly beneath the top plate, eliminating the need for external stirrer bases.
Can I use this unit in a Class II biosafety cabinet?
Yes, provided the cabinet permits placement of line-powered equipment and airflow is not obstructed by the unit’s low-profile design (10.9 cm height); verify cabinet manufacturer guidelines before installation.
What is the recommended recalibration interval for temperature accuracy?
Per VWR technical guidance and ISO/IEC 17025 best practices, perform verification against a NIST-traceable reference thermometer at least daily for critical applications, and conduct full calibration annually or after any physical impact or thermal shock event.
Is the 5-year warranty transferable if the unit is resold?
No—the limited 5-year warranty applies only to the original end-user purchaser and requires registration with VWR within 30 days of purchase; proof of original invoice is mandatory for claim processing.
Are replacement top plates available as spare parts?
Yes—ceramic (VWR Cat. No. 97042-658) and aluminum (VWR Cat. No. 97042-662) top plates are orderable separately; contact VWR Technical Support for compatibility verification prior to ordering.