WIGGENS SD Series Inductive Magnetic Drive Multi-Position Heated Stirring Dry Bath

Overview

The WIGGENS SD Series Inductive Magnetic Drive Multi-Position Heated Stirring Dry Bath is an engineered platform for parallel thermal and mechanical processing of multiple samples under precisely controlled conditions. Unlike conventional hotplate stirrers or water baths, the SD system integrates contactless inductive magnetic drive technology with uniform conductive heating across a machined aluminum block—eliminating motor wear, electromagnetic interference, and localized heat generation from drive units. Each position operates independently yet synchronously, maintaining consistent rotational velocity and thermal setpoint across all vessels. This architecture supports reproducible kinetic studies, reaction screening, solubility profiling, and stability testing where simultaneous control of temperature and agitation is critical—particularly in synthetic chemistry, biopharmaceutical formulation development, and regulatory-compliant quality control workflows.

Key Features

• Inductive magnetic drive system: Contactless torque transfer eliminates brushes, gears, and mechanical bearings—ensuring zero maintenance, no heat generation at the drive unit, and long-term speed stability even at low rpm (100 rpm) without cogging or stalling.
• Multi-position thermal uniformity: PTFE-coated aluminum heating blocks provide rapid thermal response (<6 min to 100 °C), ±0.5 °C spatial uniformity across all wells, and resistance to corrosion from organic solvents, acids, and bases.
• Four-level power modulation: Adjustable stirring power (25%/50%/75%/100%) enables optimized energy delivery—high power for viscous media (e.g., polymer solutions, cell lysates), low power for extended overnight mixing without sample overheating or vortex instability.
• Soft-start acceleration: Gradual ramp-up of magnetic field intensity prevents sudden displacement of stirring bars, reducing risk of vessel breakage and ensuring reliable initiation of rotation—even with high-density or irregularly shaped stir bars.
• Integrated dual-control interface: LED display simultaneously shows set and actual values for temperature (°C), speed (rpm), and power level; intuitive rotary encoder allows precise parameter adjustment without menu navigation.
• Overtemperature protection: Independent thermal cutoff circuit interrupts heating if internal sensor detects deviation beyond preset safety margin—compliant with IEC 61010-1 Class II requirements for laboratory equipment.

Sample Compatibility & Compliance

The SD series accommodates standard laboratory glassware including Schott DURAN® bottles (100 mL, 250 mL, 400 mL) and Erlenmeyer flasks (250 mL). Three interchangeable heating blocks—SD15-100 (15 × Ø57.5 mm), SD15-250 (15 × Ø71.5 mm), and SD8-250ERL (8 × Ø87.2 mm)—are precision-machined to match common vessel footprints and maximize thermal contact area. Optional stainless-steel Pt100 external probes (order no. 69100/69101) enable closed-loop temperature validation per ISO/IEC 17025 calibration protocols. The system meets CE marking requirements and conforms to EN 61326-1 (EMC) and EN 61010-1 (safety). While not inherently 21 CFR Part 11 compliant, audit-ready data export (via optional RS232/USB module) supports GLP/GMP documentation when integrated into validated lab informatics environments.

Software & Data Management

The SD dry bath operates as a standalone instrument with embedded firmware; no PC connection is required for routine operation. For traceable process recording, an optional serial interface enables real-time logging of temperature, speed, and power status into third-party LIMS or ELN systems. When paired with external Pt100 sensors, temperature deviation logs can be timestamped and exported as CSV for retrospective analysis. All parameter changes—including manual overrides—are retained in non-volatile memory and accessible via service mode diagnostics. Firmware updates are delivered via secure manufacturer portal and applied using standard USB flash drives—supporting version-controlled deployment in regulated laboratories.

Applications

• Parallel reaction screening: Simultaneous optimization of catalyst loading, solvent ratio, and temperature in combinatorial synthesis.
• Viscosity-dependent dissolution testing: Controlled agitation of pharmaceutical suspensions under pharmacopoeial conditions (USP , EP 2.9.3).
• Biomolecular stability assessment: Thermal denaturation studies of proteins or nucleic acids with concurrent gentle mixing to prevent sedimentation.
• Food & beverage QC: Homogenization and heating of emulsions, sauces, and dairy samples prior to rheological or microbial analysis.
• Environmental sample preparation: Digestion and extraction of solid matrices (e.g., soils, sludges) using acid mixtures under reflux-mimicking conditions.

FAQ

Can the SD dry bath be used with non-magnetic vessels such as plastic tubes or microplates?
No—the inductive drive requires ferromagnetic stirring bars placed inside conductive or diamagnetic containers (e.g., borosilicate glass, quartz). Plastic vessels must be placed on compatible metal-support inserts to ensure sufficient eddy current coupling.
Is external temperature feedback mandatory for GLP compliance?
Not mandatory, but strongly recommended: built-in block sensors provide operational control; external Pt100 probes verify actual sample temperature per ISO 17025 clause 6.4.3.
What is the maximum viscosity this system can handle at 2000 rpm?
At full power (100%), it reliably agitates aqueous glycerol solutions up to ~15,000 mPa·s (25 °C); performance depends on stir bar geometry, fill level, and vessel shape—not solely on stated rpm range.
Does the SD series support programmable ramp-hold profiles?
No—temperature and speed are manually set and held constant; for time-based thermal ramps, integration with external programmable controllers is required.
Are replacement heating blocks available for custom vessel formats?
Yes—WIGGENS offers OEM machining services for bespoke well configurations upon submission of dimensional specifications and material compatibility requirements.