Scientific Industries MagStir Genie and MultiMagStir Genie Magnetic Stirrers

Overview

The Scientific Industries MagStir Genie and MultiMagStir Genie are precision-engineered magnetic stirrers designed for reproducible, low-heat mixing in research, quality control, and routine laboratory workflows. Based on permanent magnet coupling and brushless DC motor technology, these instruments deliver consistent torque transfer without mechanical contact—eliminating friction-induced heating and ensuring thermal stability of temperature-sensitive samples such as cell suspensions, enzyme solutions, and polymer precursors. Unlike conventional stirrers with analog dials or limited digital interfaces, the Genie series integrates microprocessor-based speed regulation, real-time acceleration profiling, and multi-step programmability—enabling precise replication of complex mixing protocols across shifts and operators. The MagStir Genie serves single-vessel applications up to 2 L, while the MultiMagStir Genie supports parallel processing across four independent stirring positions (1 L max per position), making it suitable for high-throughput buffer preparation, reagent conditioning, and comparative dissolution studies.

Key Features

• Three operational modes: Manual (direct speed/direction/time control), Programmed (up to 9 sequential steps per protocol, including direction reversal, dwell time, and ramped acceleration), and Auto (recall and execute stored programs with one-touch activation)
• Programmable acceleration/deceleration (5–300 rpm/s) minimizes vortex instability during startup and prevents splashing in low-viscosity media or fragile biological suspensions
• Directional flexibility: forward, reverse, and intermittent stirring patterns support heterogeneous dispersion, particle resuspension, and shear-sensitive emulsification
• Three-tier power modulation (Low/Medium/High) ensures optimal torque delivery across viscosity ranges—from aqueous buffers to glycerol-water mixtures (up to ~1,500 mPa·s)
• Non-contact drive architecture eliminates bearing wear, lubricant contamination, and heat conduction into the sample—critical for GLP-compliant cell culture prep and ISO 17025 traceable QC testing
• ETL and CE certifications confirm compliance with IEC 61010-1 safety standards for laboratory electrical equipment

Sample Compatibility & Compliance

The MagStir Genie accommodates standard borosilicate glassware—including 50 mL to 2 L beakers, Erlenmeyer flasks, and tall-form cylinders—without requiring specialized stir bars or platform adapters. Its compact footprint (200 × 160 × 55 mm) allows integration into biosafety cabinets, cold rooms, and laminar flow hoods. The MultiMagStir Genie’s quadruple-position layout is optimized for uniform thermal and mechanical loading; each station features independent speed calibration and isolated magnetic field containment to prevent cross-talk between vessels. Both models operate at ambient laboratory temperatures (15–30 °C) and are compatible with PTFE- or glass-coated stir bars rated for chemical resistance (e.g., ASTM D5233-compliant coatings). No external cooling or heating modules are integrated; users must pair with thermostatic baths or hotplates if temperature-controlled stirring is required.

Software & Data Management

While the Genie series operates via embedded firmware without PC connectivity, its programmable architecture supports audit-ready process documentation. Each stored program retains full parameter metadata—including target rpm, dwell duration, direction flag, acceleration rate, and power level—accessible via front-panel LCD. Timestamped execution logs are not retained internally; however, the deterministic behavior of the microcontroller (with ±1 rpm speed stability over 8-hour continuous operation) enables manual log correlation in regulated environments. For laboratories operating under FDA 21 CFR Part 11 or EU Annex 11 requirements, validation packages—including IQ/OQ protocols, calibration templates, and traceable performance verification checklists—are available directly from Scientific Industries upon request.

Applications

• Cell culture maintenance: gentle, non-thermal mixing of serum-containing media in T-flasks and roller bottles
• Pharmaceutical QC: uniform dissolution of active pharmaceutical ingredients (APIs) in USP Apparatus 2–compatible vessels
• Materials science: dispersion of nanomaterials (e.g., graphene oxide, TiO₂ nanoparticles) in polar solvents prior to rheological or spectroscopic analysis
• Environmental testing: homogenization of soil leachates and wastewater slurry samples prior to ICP-MS or HPLC analysis
• Educational labs: teaching core principles of fluid dynamics, mixing efficiency (Blending Number), and process scalability

FAQ

Can the MagStir Genie be used with ferromagnetic stir bars?
No. Only PTFE- or glass-coated magnetic stir bars are recommended to avoid demagnetization and ensure consistent rotational coupling.
Is the MultiMagStir Genie suitable for viscous silicone oils?
Yes—when paired with high-torque stir bars (≥30 mm length) and operated in High power mode at speeds ≤600 rpm; viscosity limits depend on bar geometry and vessel aspect ratio.
Does the instrument support external timer or relay integration?
No. All timing functions are self-contained; no RS-232, USB, or dry-contact outputs are provided.
How often does the unit require recalibration?
Speed calibration is factory-set and stable over time; annual verification using a certified tachometer is recommended for ISO/IEC 17025-accredited labs.
Are replacement stir plates available as spare parts?
Yes—order part numbers SI-PLATE-MG (MagStir Genie) and SI-PLATE-MMG (MultiMagStir Genie) directly from Scientific Industries’ global distribution network.