IKA MINISTAR 20 control Overhead Stirrer

Overview

The IKA MINISTAR 20 control is a precision-engineered overhead stirrer designed for demanding laboratory applications requiring high torque stability, reproducible speed control, and integrated thermal monitoring. Built upon IKA’s decades-long expertise in rotational mixing technology, this unit operates on a brushless DC motor architecture—eliminating carbon wear, reducing electromagnetic interference, and ensuring long-term speed fidelity across viscosity fluctuations. Unlike conventional gear-driven stirrers, the MINISTAR 20 control employs microprocessor-based closed-loop speed regulation, dynamically compensating for load-induced deceleration to maintain setpoint accuracy within ±1 rpm above 300 rpm (±3 rpm below). Its compact footprint (70 × 193 × 154 mm) and lightweight aluminum-thermoplastic housing enable flexible integration into fume hoods, glove boxes, or temperature-controlled chambers—without compromising mechanical rigidity or thermal stability.

Key Features

• Brushless DC motor delivering 46 W continuous output power and peak torque of 40 N·cm—optimized for viscous media up to 30,000 mPa·s
• Full-speed range of 50–2000 rpm with digital LCD display and analog control knob; resolution: 1 rpm
• Integrated PT1000-compatible temperature input channel with ±0.05 K accuracy (DIN IEC 751 Class A), enabling real-time thermal feedback during exothermic or endothermic mixing
• IP54-rated enclosure—dust-protected and splash-resistant—suitable for use in ISO Class 7 cleanrooms and GLP-compliant environments
• Dual communication interfaces: USB 2.0 (for parameter logging, firmware updates, and labworldsoft® synchronization) and Bluetooth 4.2 (for remote operation via IKA Labworld mobile application)
• Vibration-sensing safety system that triggers automatic shutdown if mechanical resonance exceeds predefined amplitude thresholds—protecting both sample integrity and drive shaft longevity
• Key-lock function prevents accidental parameter changes during unattended operation; programmable timer supports durations from 1 to 6000 minutes
• Hollow shaft design (8.5 mm internal diameter) allows insertion of temperature probes, pH electrodes, or sampling needles without interrupting agitation

Sample Compatibility & Compliance

The MINISTAR 20 control accommodates standard laboratory vessels—from 50 mL glass vials to 15 L stainless steel or borosilicate reactors—using IKA’s universal chuck system (0.5–8 mm clamping range). Its chemical-resistant housing resists common solvents including acetone, ethanol, chloroform, and dilute acids/bases. The device conforms to EN 61000-6-3 (EMC emission limits), EN 61000-6-2 (immunity), and DIN EN 60529 (IP54 ingress protection). For regulated environments, its USB data export capability supports audit-ready traceability when paired with labworldsoft® software compliant with FDA 21 CFR Part 11 requirements—including electronic signatures, change history, and user-access logs.

Software & Data Management

IKA labworldsoft® serves as the central platform for configuration, monitoring, and documentation. Users can define multi-step stirring protocols—including ramped speed profiles, timed temperature-triggered pauses, and torque threshold alerts—with full export to CSV or PDF formats. All parameter changes, runtime events, and sensor readings are timestamped and stored locally or on network drives. Firmware updates are delivered over USB with cryptographic signature verification to ensure system integrity. Bluetooth connectivity enables real-time status dashboards on tablets or PCs—ideal for QC labs managing parallel reactor arrays under SOP-driven workflows.

Applications

This stirrer is routinely deployed in polymer synthesis (e.g., epoxy resin curing kinetics), pharmaceutical suspension homogenization (USP compliance), battery electrolyte formulation, catalyst dispersion for heterogeneous catalysis, and bioreactor seed culture preparation. Its low-noise operation (<55 dB(A)) and stable torque delivery make it suitable for shear-sensitive biological matrices such as protein solutions or cell-laden hydrogels. In quality control settings, it supports ASTM D2196 (viscosity of non-Newtonian materials) and ISO 2555 (solution viscosity by rotational method) test protocols when coupled with calibrated viscometers.

FAQ

Can the MINISTAR 20 control be used with external temperature controllers?
Yes—it accepts analog voltage signals (0–10 V) from third-party PID controllers via its auxiliary I/O port, enabling cascaded temperature-speed control loops.
Is the hollow shaft compatible with all IKA impellers?
It supports all standard IKA PTFE, stainless steel, and glass-coated impellers with shaft diameters ≤8 mm; custom impeller mounting adapters are available upon request.
Does the device support GLP-compliant electronic record keeping?
When operated with labworldsoft® in Audit Trail mode, it generates immutable logs meeting ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate) required for GMP audits.
What maintenance is required for long-term reliability?
No scheduled lubrication or brush replacement is needed due to the brushless motor design; periodic inspection of chuck jaws and shaft coupling is recommended every 12 months.
Can multiple MINISTAR units be synchronized via Bluetooth?
Up to four units may be grouped and controlled simultaneously through the IKA Labworld app, with individual or collective parameter assignment and synchronized start/stop commands.