Corning Digital Magnetic Hotplate Stirrer

Overview

The Corning Digital Magnetic Hotplate Stirrer is an engineered laboratory workhorse designed for precise, reproducible heating and magnetic stirring in space-constrained environments. Utilizing a permanent magnet-driven rotating field beneath a thermally stable Pyroceram® glass-ceramic plate, it induces controlled rotational motion in PTFE- or ceramic-coated stir bars immersed in liquid samples. Heat is delivered via embedded resistive elements with microprocessor-regulated feedback control, enabling stable thermal setpoints up to 500°C. Its low-profile form factor—just 4.875 inches (12.4 cm) in height—allows seamless integration under fume hoods, inside laminar flow cabinets, or within modular lab storage systems. The device operates on standard 120 V AC power and complies fully with UL 61010-1 and CAN/CSA C22.2 No. 61010-1 safety standards for laboratory electrical equipment.

Key Features

• Pyroceram® glass-ceramic top plate: Offers exceptional thermal uniformity across the surface, high chemical resistance (including to strong acids, bases, and organic solvents), scratch resistance, and non-magnetic properties—ensuring no interference with magnetic stir bar performance or nearby instrumentation.
• Dual digital LED display: Simultaneously shows real-time setpoint and actual temperature (±1°C accuracy) and stir speed (60–1,200 rpm, ±10 rpm repeatability). Temperature display blinks during ramp-up; speed display stabilizes once target RPM is achieved.
• Microprocessor-based control system: Maintains consistent thermal output and rotational velocity through closed-loop feedback, minimizing drift during extended operation (e.g., overnight digestions or dissolution testing).
• Integrated safety architecture: Includes dual independent overtemperature safeguards—a surface-mounted thermal sensor that activates a visible red LED warning when plate temperature exceeds 60°C, and a redundant internal thermal cutoff that de-energizes the heater if internal chassis temperature rises beyond safe limits.
• Modular accessory compatibility: Designed to interface directly with Corning’s universal support stand (Cat. No. 440129, height-adjustable from 9″ to 18″) for mounting pH electrodes, temperature probes, burettes, or condensers. Supports optional external temperature probe control (Cat. No. 6795PR) for accurate solution-core temperature regulation.

Sample Compatibility & Compliance

The Corning Digital Magnetic Hotplate Stirrer accommodates standard round-bottom and flat-bottom vessels ranging from 10 mL to 4 L capacity, provided appropriate stir bar geometry and size are selected (e.g., cross-shaped bars for viscous media, elliptical bars for low-volume precision mixing). It is compatible with borosilicate glass, PTFE-lined, and stainless-steel containers. All units are manufactured in the United States and imported as CE- and RoHS-compliant instruments. UL/cUL listing confirms adherence to international electrical safety requirements for Class I, Division 1 laboratory environments. While not inherently GLP/GMP-certified, its stable control logic, audit-ready LED displays, and optional external probe integration support traceable method execution per ISO/IEC 17025 and USP environmental control guidelines.

Software & Data Management

This analog-digital hybrid instrument does not feature onboard data logging or USB/Ethernet connectivity. However, its dual LED readouts provide immediate visual verification of operational parameters for manual recordkeeping. When paired with the optional Corning External Temperature Controller (Cat. No. 6795PR), users gain direct access to solution-internal temperature feedback—enabling correlation of thermal input with measured response, a prerequisite for validation protocols in QC labs. For regulated environments requiring electronic records, third-party data acquisition systems (e.g., LabVIEW-compatible thermocouple interfaces or RS-232-enabled chart recorders) may be integrated via auxiliary analog outputs (available upon request from Corning Technical Support).

Applications

• Buffer and reagent preparation in molecular biology and clinical diagnostics labs
• Homogenization of polymer solutions and nanoparticle suspensions prior to rheological or DLS analysis
• Controlled heating during titration, extraction, or enzymatic reaction kinetics studies
• Preparation of calibration standards for ICP-MS, HPLC, or AAS where thermal stability and mixing consistency impact accuracy
• Supporting ASTM D2196 (viscosity of paints) and ISO 3219 (rheology of polymer solutions) sample conditioning steps

FAQ

Does this unit support external temperature probe feedback for closed-loop solution temperature control?
Yes—when used with the optional Corning External Temperature Probe Controller (Cat. No. 6795PR), the system switches from surface-temperature regulation to direct solution-temperature regulation with automatic power modulation.
Is the Pyroceram® plate resistant to hydrofluoric acid (HF)?
No—while highly resistant to most common laboratory chemicals including concentrated HNO₃, H₂SO₄, NaOH, and acetone, Pyroceram® is not HF-resistant. Avoid contact with hydrofluoric acid or fluoride-containing etchants.
Can multiple units be stacked vertically for space optimization?
No—due to heat dissipation requirements and UL safety clearance specifications, vertical stacking is prohibited. Use the Corning support stand (Cat. No. 440129) for tiered horizontal configuration instead.
What stir bar sizes are recommended for optimal performance at maximum speed?
For stable operation at 1,200 rpm, use elliptical or fleur-de-lis stir bars ≤ 25 mm in length. Larger bars (>40 mm) may induce wobble or vortex instability above 800 rpm in low-viscosity media.
Is firmware upgrade capability available?
No—this is a fixed-function analog-digital controller with no field-upgradable firmware. Calibration and maintenance must be performed by authorized Corning service centers per manufacturer-recommended intervals (typically every 12 months for ISO/IEC 17025 compliance).