IKA Eurostar Digital Overhead Stirrer

Overview

The IKA Eurostar Digital Overhead Stirrer is a precision-engineered laboratory stirring system designed for reliable, reproducible mixing of low- to medium-viscosity liquids (up to 10,000 mPa·s) in volumes up to 20 L of water-equivalent media. Engineered in Germany and built to IKA’s long-standing quality standards, this overhead stirrer employs a brushless DC motor coupled with a microprocessor-based control unit to deliver true stepless speed regulation across a broad operational range (50–2000 rpm). Unlike gear-driven systems, it eliminates mechanical transmission losses and wear—ensuring consistent torque delivery and minimizing maintenance requirements. Its compact footprint (80 × 222 × 190 mm), lightweight aluminum housing (2.8 kg), and quiet operation make it suitable for integration into fume hoods, biosafety cabinets, or multi-instrument benchtop configurations without compromising workspace efficiency.

Key Features

• Microprocessor-controlled speed regulation with real-time LCD display of set and actual rpm—enabling precise process documentation and repeatability.
• Constant-torque output of 30 N·cm across the full operational speed range (60–1000 rpm), ensuring stable agitation even during viscosity fluctuations or load changes.
• Hollow stainless-steel stirring shaft (11 mm internal diameter) allows for inline sensor insertion (e.g., pH, temperature, or conductivity probes) while the unit is at rest—supporting multi-parameter reaction monitoring.
• Integrated electronic safety circuit with automatic overload detection and thermal cut-off prevents motor damage under stall or high-viscosity conditions.
• Gentle ramp-up start function minimizes splashing and ensures operator safety when initiating high-speed agitation in open vessels.
• Ergonomic clamp-mount design with 160 mm extension arm (13 mm diameter) provides flexible positioning over round-bottom flasks, bioreactors, or jacketed reactors.
• IP42-rated enclosure (per DIN EN 60529) offers protection against dripping water and solid objects ≥1 mm—suitable for standard wet-lab environments.

Sample Compatibility & Compliance

The Eurostar Digital accommodates a wide range of laboratory vessels—from 50 mL centrifuge tubes to 20 L glass or stainless-steel reactors—when paired with appropriate impellers (e.g., paddle, propeller, or anchor types) and compatible shaft couplings. Its 0.5–10 mm chuck accepts standard laboratory stirring rods and custom-fabricated agitators. The system complies with CE marking requirements and meets essential health and safety provisions of the EU Machinery Directive 2006/42/EC. While not inherently 21 CFR Part 11 compliant (as it lacks audit-trail-capable software), its stable, deterministic performance supports GLP and GMP-aligned workflows where manual logbook recording of speed and duration is standard practice. It is routinely deployed in applications referenced in ASTM D1200 (viscosity measurement by Ford cup), ISO 3219 (rheological testing of polymer solutions), and USP (dissolution apparatus verification protocols).

Software & Data Management

This model operates as a standalone instrument without embedded data logging or PC connectivity (no RS232, USB, or analog output interfaces). All operational parameters—including set speed, actual rpm, and runtime—are observable via the front-panel LCD. For laboratories requiring digital traceability, external data acquisition systems (e.g., LabVIEW or MATLAB via TTL-triggered pulse outputs using optional accessories) may be integrated. IKA’s labworldsoft® platform does not support this generation; however, users seeking advanced automation should consider the Eurostar Power Control series, which includes Ethernet and USB interfaces with full FDA 21 CFR Part 11–ready software options.

Applications

• Homogenization of aqueous buffers, cell culture media, and reagent solutions in R&D and QC labs.
• Controlled agitation during chemical synthesis, crystallization studies, and precipitation reactions in glass-jacketed reactors.
• Preparation of suspensions, emulsions, and colloidal dispersions where shear-sensitive components require gentle yet uniform mixing.
• Stirring in environmental testing (e.g., BOD incubation, wastewater sample conditioning) per EPA Method 415.1 and ISO 5815-1.
• Supporting dissolution testing in pharmaceutical development when used with USP Apparatus II (paddle) fixtures and calibrated vessels.

FAQ

Does the Eurostar Digital support continuous operation?
Yes—it is rated for 100% duty cycle under nominal load conditions (≤10,000 mPa·s, ≤20 L H₂O-equivalent), provided ambient temperature remains within 5–40 °C and relative humidity does not exceed 80 %.
Can I insert a temperature probe through the hollow shaft during operation?
No—the hollow shaft permits probe insertion only when the unit is stopped. Rotation while a probe is inserted risks mechanical interference and shaft deformation.
Is the stirrer compatible with corrosive solvents?
The shaft and chuck are stainless steel (AISI 316-compatible); however, prolonged exposure to halogenated or strong oxidizing agents requires verification of material compatibility per your specific solvent and concentration.
What impeller types are recommended for high-shear dispersion?
For shear-intensive tasks (e.g., nanoparticle dispersion), use narrow-blade turbine or disperser discs mounted on rigid shafts—avoid flexible shafts above 1500 rpm due to resonance risk.
Does IKA provide calibration certificates for this model?
Factory calibration of speed accuracy (±1% of set value) is performed prior to shipment; certified calibration reports are available upon request as an optional service (traceable to PTB standards).