IKA Maxi MR 1 Digital Magnetic Stirrer

Overview

The IKA Maxi MR 1 Digital Magnetic Stirrer is a high-capacity, precision-engineered laboratory stirrer designed for demanding mixing applications in industrial R&D, quality control, and large-scale process development laboratories. Operating on the principle of magnetic coupling—where a rotating permanent magnet beneath the plate induces synchronous rotation of a magnetic stir bar immersed in the sample—the Maxi MR 1 delivers stable, non-contact agitation without mechanical shaft penetration or seal wear. Unlike heated stirrers, this model is specifically configured for temperature-neutral mixing environments, making it ideal for applications where thermal stability, chemical compatibility, or external temperature control (e.g., via water baths or environmental chambers) is required. Its robust stainless-steel housing (material grade 1.4301), oversized 500 × 500 mm working surface, and 35 W motor output enable reliable operation with viscous or dense media up to 150 L (water-equivalent volume), supporting scalable method transfer from benchtop to pilot-scale workflows.

Key Features

• High-power magnetic drive system engineered for consistent torque delivery across the full 0–600 rpm speed range, with digital LED display for real-time speed verification and repeatable setpoint recall.
• Large-format stainless-steel (1.4301) working plate—resistant to corrosion, mechanical abrasion, and common solvents—optimized for uniform field distribution and long-term dimensional stability.
• Programmable timer with adjustable duration from 0 to 56 minutes or continuous mode, enabling unattended operation while maintaining GLP-compliant process documentation when paired with external data loggers.
• Dual communication interfaces (RS 232 and USB) support integration into centralized lab automation systems, facilitating remote parameter control, speed logging, and audit-trail generation per FDA 21 CFR Part 11 requirements when used with compliant software platforms.
• IP21-rated enclosure ensures protection against vertically falling drips and solid objects ≥12.5 mm, meeting DIN EN 60529 standards for safe operation in standard laboratory environments (5–40 °C, ≤80 % RH).
• Compact yet heavy-duty chassis (21.36 kg) minimizes vibration-induced displacement during high-volume stirring, enhancing reproducibility in multi-hour mixing protocols.

Sample Compatibility & Compliance

The Maxi MR 1 accommodates a wide range of container geometries—including glass beakers, stainless-steel reactors, and polymeric vessels—provided the vessel base is non-magnetic and ≤25 mm thick. It supports stir bars up to 155 mm in length, enabling efficient mixing in tall or narrow configurations. The absence of integrated heating eliminates thermal interference, preserving sample integrity for thermolabile compounds, enzymatic reactions, or pH-sensitive formulations. Device compliance includes conformity with IEC 61010-1 (safety requirements for electrical equipment), EMC Directive 2014/30/EU, and RoHS 2011/65/EU. While not certified for hazardous area use, its design aligns with general laboratory safety best practices referenced in ISO/IEC 17025:2017 for equipment suitability assessment.

Software & Data Management

Although the Maxi MR 1 operates as a standalone instrument, its RS 232 and USB ports allow bidirectional communication with host PCs running IKA Labworldsoft® or third-party SCADA/LIMS platforms. Users can configure speed profiles, initiate/terminate runs, read actual RPM values, and timestamp events—all traceable for internal validation or regulatory audits. When deployed in GxP-regulated settings, the device supports electronic record retention when paired with validated software that enforces user authentication, change control, and audit trail archiving in accordance with ALCOA+ principles.

Applications

• Homogenization of polymer solutions, suspensions, and colloidal dispersions in materials science labs.
• Preparation of large-batch calibration standards and reference materials under ISO Guide 35 and USP analytical instrument qualification frameworks.
• Mixing of culture media and buffer solutions in biopharmaceutical upstream processing.
• Stirring of electroplating baths, catalyst slurries, and ceramic precursor mixtures in industrial R&D centers.
• Long-duration dissolution testing where constant agitation without thermal input is critical (e.g., USP Apparatus 2 adaptations).

FAQ

Does the Maxi MR 1 include a heating function?
No. This model is a non-heated magnetic stirrer intended for ambient-temperature mixing only.
What is the maximum allowable container height for stable operation?
Container height is not directly limited, but optimal performance requires the stir bar to remain fully submerged and centered; users should verify vortex formation and homogeneity empirically for each vessel configuration.
Can the Maxi MR 1 be operated in a fume hood?
Yes, provided ambient temperature remains within 5–40 °C and relative humidity does not exceed 80 %; ensure adequate ventilation around the unit’s rear vents to prevent thermal buildup.
Is calibration required prior to use?
While no routine factory calibration is mandated, users should verify speed accuracy using an external tachometer during IQ/OQ qualification, especially when traceability to national standards is required.
How is firmware updated?
Firmware updates are performed exclusively via USB using IKA-provided utilities and require connection to a Windows-based PC running Labworldsoft® version 5.0 or later.