IKA Maxi MR 1 Digital Magnetic Stirrer

Overview

The IKA Maxi MR 1 Digital Magnetic Stirrer is a high-capacity, single-position laboratory stirrer engineered for robust, long-duration mixing of large-volume samples in demanding research, quality control, and industrial R&D environments. Unlike compact benchtop stirrers, the Maxi MR 1 employs a high-torque brushless DC motor coupled with a precision magnetic drive system to deliver stable rotational motion across its full 0–600 rpm range—optimized for consistent suspension, homogenization, and dissolution tasks in vessels up to 150 L. Its operation is based on the principle of magnetic coupling: rotation of an internal permanent magnet array beneath the stainless-steel workplate induces synchronous rotation of a magnetic stir bar immersed in the sample. This contactless transmission eliminates mechanical wear, ensures low maintenance, and supports operation under sealed or inert-atmosphere conditions. Designed exclusively for non-heated applications, the Maxi MR 1 prioritizes torque stability, speed accuracy, and operational reliability over thermal functionality—making it ideal for temperature-sensitive formulations, solvent-based reactions, or processes requiring strict thermal isolation.

Key Features

• Single-position, high-capacity design supporting up to 150 L of aqueous solution per stirring cycle
• Digital LED display showing real-time rotational speed (0–600 rpm) and programmable countdown timer (0–56 minutes or continuous mode)
• Brushless DC motor delivering 35 W mechanical output from 80 W electrical input—engineered for high efficiency, low heat generation, and extended service life
• Stainless steel workplate (material grade 1.4301) measuring 500 × 500 mm, offering exceptional corrosion resistance, flatness tolerance ≤ 0.1 mm/m, and compatibility with aggressive solvents and cleaning agents
• IP21-rated enclosure (per DIN EN 60529), providing protection against vertically falling droplets and solid objects > 12.5 mm—suitable for standard laboratory environments with controlled humidity (≤ 80 % RH) and ambient temperatures between 5–40 °C
• Universal voltage compatibility: auto-switching support for 100–120 V (50/60 Hz) and 230 V (50/60 Hz) mains supply, enabling seamless deployment across North American, European, and Asian laboratory infrastructures
• Optimized magnetic circuit design accommodating stir bars up to 155 mm in length—ensuring effective coupling even in tall, narrow vessels or high-viscosity media

Sample Compatibility & Compliance

The Maxi MR 1 accommodates a broad range of vessel geometries—including glass carboys, stainless-steel reactors, polypropylene IBC totes, and custom jacketed tanks—provided the base diameter does not exceed 480 mm and the stir bar remains fully submerged. It is routinely deployed in applications involving aqueous buffers, organic solvents (e.g., acetone, ethanol, THF), polymer solutions, colloidal suspensions, and low-to-medium viscosity emulsions (< 5,000 mPa·s). The device complies with IEC 61010-1:2010 for electrical safety in laboratory equipment and meets EMC requirements per EN 61326-1:2013. While not intrinsically safe for explosive atmospheres, its non-heating architecture and absence of surface hotspots render it suitable for use in Class 1, Division 2 (C1D2) environments when operated within specified ambient limits. No regulatory certification for GMP/GLP environments is claimed; however, its repeatable speed control and timer functionality support traceable process documentation when integrated into validated workflows.

Software & Data Management

The Maxi MR 1 operates as a standalone instrument without embedded microprocessor-based data logging or PC connectivity. All operational parameters—including set speed, elapsed time, and timer status—are displayed locally via the integrated LCD. For laboratories requiring audit-ready records, external validation protocols may incorporate video time-lapse capture, calibrated tachometer verification, or integration with building management systems (BMS) via dry-contact relay outputs (optional accessory). Though lacking native FDA 21 CFR Part 11 compliance features such as electronic signatures or secure user access control, the device’s deterministic behavior—zero drift in speed calibration, no firmware updates required, and no volatile memory—facilitates straightforward IQ/OQ/PQ qualification under ISO/IEC 17025 or ASTM E2500 frameworks.

Applications

• Large-scale buffer preparation and dilution in biopharmaceutical downstream processing
• Homogenization of catalyst slurries prior to fixed-bed reactor charging
• Continuous mixing during pilot-plant crystallization trials
• Stabilization of pigment dispersions in coating formulation labs
• Agitation of culture media in microbiological fermentation support systems
• Pre-mixing of epoxy resins and composite matrix precursors in materials science facilities

FAQ

Does the Maxi MR 1 include a heating function?
No. The Maxi MR 1 is a non-heated magnetic stirrer. It provides only rotational agitation and must be paired with an external heating source (e.g., water bath, heating mantle, or climate-controlled chamber) if thermal input is required.
What is the maximum recommended viscosity for reliable stirring at full capacity?
For consistent performance at 150 L volume, the medium should exhibit dynamic viscosity below 1,000 mPa·s at operating temperature. Higher viscosities require proportional reduction in vessel fill level or use of longer, high-moment stir bars.
Is the workplate surface chemically resistant to strong acids or bases?
Yes. The 1.4301 stainless steel plate demonstrates excellent resistance to nitric acid, phosphoric acid, sodium hydroxide, and common laboratory detergents. Prolonged exposure to halogenated acids (e.g., HCl, HF) or hypochlorite solutions is not recommended.
Can the timer be used for automatic shutdown after a defined interval?
Yes. The built-in timer triggers audible alert and motor stop upon reaching the preset duration (0–56 minutes). Continuous mode bypasses timing logic entirely.
What safety certifications does the unit carry?
It conforms to IEC 61010-1:2010 (Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use) and EN 61326-1:2013 (EMC for Laboratory Equipment). CE marking is affixed per EU Directive 2014/30/EU (EMC) and 2014/35/EU (LVD).