IKA Eurostar 40 Digital KLC Stirrer

Overview

The IKA Eurostar 40 Digital KLC Stirrer is a precision-engineered, microprocessor-controlled laboratory stirrer designed for reproducible, high-stability mixing across diverse liquid-phase applications. Built upon a brushless DC motor architecture, it eliminates carbon brush wear and delivers consistent torque output up to 40 N·cm—enabling reliable operation under variable load conditions, including viscosity fluctuations during reaction progress or temperature-induced rheological changes. Its core control principle relies on real-time closed-loop speed feedback: the system continuously compares actual shaft rotation (measured via integrated optical or Hall-effect sensing) against user-defined setpoints and dynamically adjusts power delivery to maintain target rpm within defined tolerances (±1 rpm above 300 rpm; ±3 rpm below). This active regulation ensures process fidelity in protocols requiring strict kinetic control—such as dissolution testing, polymerization initiation, or buffer equilibration—where even transient speed drift can compromise experimental repeatability. The unit operates without integrated heating or cooling elements, positioning it as a dedicated mechanical agitation platform compatible with external temperature-controlled vessels (e.g., water baths or Peltier-equipped jackets).

Key Features

• Brushless DC motor technology for maintenance-free, low-noise operation and extended service life
• Closed-loop speed control with real-time deviation correction and LED-displayed rpm resolution of 1 rpm
• Overload protection circuitry that halts motor operation upon stall or sustained torque exceedance, preventing thermal damage
• Hollow shaft design (11 mm internal diameter) enabling simultaneous insertion of temperature probes, pH electrodes, or sampling needles without interrupting agitation
• Ergonomic cast aluminum housing with thermoplastic polymer coating, rated IP40 for protection against solid ingress (e.g., dust, splashes)
• Universal voltage compatibility (100–230 V, 50/60 Hz) supporting global laboratory deployment without transformer dependency
• Clamp jaw accommodating stirring rods from 0.5 mm to 10 mm diameter, ensuring compatibility with standard glass, PTFE-coated, or custom impellers
• Compact footprint (86 × 248 × 208 mm) and lightweight construction (4.4 kg) optimized for benchtop integration in fume hoods or confined analytical workstations

Sample Compatibility & Compliance

The Eurostar 40 Digital KLC supports aqueous and non-aqueous media with viscosities up to 30,000 mPa·s—covering common solvents, surfactant solutions, colloidal suspensions, and low-to-medium molecular weight polymer melts. Its 25 L maximum working volume (referenced to water at 20 °C) aligns with ISO 8573-1 and ASTM D1298 density-based volumetric calibration conventions. While not certified for hazardous area use (non-explosion-proof), its electrical design complies with EN 61010-1:2019 for safety in laboratory equipment. The absence of analog/digital communication interfaces (e.g., RS232, USB, or 4–20 mA outputs) means it functions as a standalone instrument—ideal for GLP-compliant environments where audit trails require manual log entries or integration via external data acquisition systems.

Software & Data Management

This stirrer operates independently of proprietary software. All operational parameters—including speed setpoint, real-time rpm, and fault codes (e.g., E1 = overload, E2 = sensor failure)—are displayed locally via a 7-segment LED interface. No embedded memory, timestamping, or electronic record-keeping functionality is included. For regulated workflows governed by FDA 21 CFR Part 11 or EU Annex 11, users must implement external validation protocols when pairing the device with digital logging tools (e.g., USB-connected data loggers or PLC-integrated HMIs). The absence of network connectivity simplifies IQ/OQ documentation and reduces cybersecurity validation scope in GMP manufacturing labs.

Applications

• Homogenization of reagent batches in pharmaceutical QC laboratories (USP <797> compliant compounding support)
• Controlled agitation during titration, dissolution, or extraction procedures per ASTM E2656 and ISO 10523 standards
• Stirring of culture media in microbiology workflows requiring stable shear profiles over extended durations
• Preparation of calibration standards and reference materials where rotational consistency directly impacts concentration uniformity
• Integration into automated reactor systems via dry-contact relay triggers (optional accessory kits available)

FAQ

Does the Eurostar 40 Digital KLC support programmable ramping or multi-step speed profiles?
No. It provides only manual, continuous speed adjustment via rotary encoder. Programmable sequences require external controller integration.

Can the stirrer be mounted on third-party stands or frames?
Yes. Its standardized 16 mm diameter extension arm and M6 threaded base are mechanically compatible with most universal lab clamps and modular mounting systems.

What maintenance intervals are recommended for the brushless motor?
No scheduled maintenance is required. The motor’s sealed construction and absence of consumable brushes eliminate routine servicing—only periodic visual inspection of shaft coupling integrity and clamp jaw wear is advised.

Is the unit suitable for continuous operation over 8 hours?
Yes. Rated for 100% duty cycle at ambient temperatures ≤40 °C and relative humidity ≤80 %, provided adequate ventilation around the housing is maintained.

How is torque limitation enforced during overload events?
The embedded current-sensing circuit detects abnormal draw exceeding 84 W output threshold and initiates immediate shutdown—preventing coil saturation and irreversible demagnetization of the permanent magnet rotor.