IKA EUROSTAR 20 digital Overhead Stirrer

Overview

The IKA EUROSTAR 20 digital is a high-precision overhead stirrer engineered for consistent, reproducible mixing in research laboratories, quality control environments, and small-scale production settings. Based on brushless DC motor technology, it delivers stable rotational motion without mechanical wear from carbon brushes—ensuring long-term torque fidelity and minimal maintenance. Its core operating principle relies on closed-loop electronic speed regulation: an integrated microprocessor continuously compares actual shaft speed (measured via back-EMF or Hall-effect sensing) against the user-defined setpoint and dynamically adjusts power delivery to maintain deviation within ±1 rpm (above 300 rpm) or ±3 rpm (below 300 rpm). This real-time feedback architecture enables reliable performance across viscosity shifts—critical when processing non-Newtonian fluids, polymer solutions, or suspensions where rheological behavior changes during agitation. Designed for ISO/IEC 17025-compliant labs, the unit meets essential safety and electromagnetic compatibility requirements per DIN EN 61000-6-2/-6-4 and carries CE marking under the EU Machinery Directive 2006/42/EC.

Key Features

• Brushless DC motor delivering 42 W output power and 20 N·cm maximum torque—optimized for sustained operation at high load
• True continuous (infinite) speed control from 0/30 to 2000 rpm with LED digital display for unambiguous readout
• Intelligent overload protection: automatic shutdown upon motor stall or thermal threshold exceedance, with error code display for rapid diagnostics
• Hollow stainless-steel stirring shaft (11 mm internal diameter) permits insertion of temperature probes, pH electrodes, or sampling needles without interrupting agitation
• Robust die-cast aluminum housing with impact-resistant thermoplastic polymer coating—designed for chemical resistance and mechanical durability
• IP 42 ingress protection rating ensures operational reliability in standard laboratory environments with moderate dust and drip exposure
• Full 100 % duty cycle capability supports uninterrupted overnight or multi-shift mixing protocols
• Low-noise operation (<55 dB(A) at 1 m) minimizes acoustic interference in shared lab spaces

Sample Compatibility & Compliance

The EUROSTAR 20 digital accommodates a broad range of sample types—from low-viscosity aqueous buffers (e.g., PBS, Tris-HCl) to highly viscous media such as methylcellulose gels, silicone oils, and latex emulsions up to 10,000 mPa·s. Its fixed chuck accepts standard stirring rods (0.5–10 mm OD), including PTFE-coated, glass, and stainless-steel variants. The device complies with key international standards relevant to laboratory equipment: DIN EN 61010-1 (safety requirements for electrical equipment), DIN EN 61326-1 (EMC for lab instrumentation), and conforms to GLP documentation expectations through traceable speed calibration and repeatable mechanical output. While not FDA 21 CFR Part 11–validated out-of-the-box, its deterministic speed behavior and error logging support audit-ready workflows when integrated into validated SOPs.

Software & Data Management

This model operates as a standalone instrument without proprietary PC software. All configuration and monitoring occur via front-panel controls and real-time LED display. However, its analog tachometer output (0–10 V) and optional RS232 interface (via IKA Labworldsoft adapter kit) enable integration into centralized lab data acquisition systems. When connected, users may log timestamped speed, torque, and fault events—supporting compliance with ISO 17025 clause 7.7 (result reporting) and internal QA record retention policies. No embedded storage or cloud connectivity is provided; data persistence relies on external SCADA or LIMS infrastructure.

Applications

• Homogenization of cell culture media and fermentation broths prior to sterile filtration
• Preparation of calibration standards for viscometry and particle size analysis
• Mixing of reagent batches in clinical chemistry and pharmaceutical QC labs
• Dispersion of nanoparticles in solvent matrices under controlled shear conditions
• Accelerated stability testing of topical formulations (creams, ointments) per ICH Q5C guidelines
• Supporting ASTM D2196 (viscosity of paints) and ISO 2557-2 (plasticized PVC compound mixing) test methods

FAQ

Is the EUROSTAR 20 digital compatible with glass stirring rods?

Yes—it accepts standard ground-glass or polished glass rods with diameters between 0.5 mm and 10 mm using the fixed chuck mechanism.
Can it operate continuously for 24 hours?

Yes—the 100 % duty cycle rating and thermally optimized brushless motor allow uninterrupted operation under nominal load conditions.
Does it support external speed control via analog signal?

Yes—an isolated 0–10 V analog input is available for remote speed setpoint modulation, enabling synchronization with reactor temperature or pH controllers.
What maintenance is required?

No routine lubrication or brush replacement is needed; periodic visual inspection of chuck integrity and shaft concentricity is recommended every 6 months.
Is it suitable for use in fume hoods?

Yes—its IP 42 rating and absence of volatile off-gassing materials make it appropriate for ventilated enclosures, provided ambient temperature remains within 5–40 °C.