JEIO TECH MSA-0420 Overhead Stirrer
| Brand | JEIO TECH |
|---|---|
| Origin | South Korea |
| Model | MSA-0420 |
| Stirrer Type | Electric Overhead Stirrer |
| Max. Mixing Volume | 20 L |
| Speed Range | 80–2000 rpm |
| Torque | 19 N·cm |
| Max. Viscosity Handling | 10,000 cP (at 1200 rpm) |
| Temperature Control Range | 5–40 °C |
| Motor | Brushless DC |
| Power Input/Output | 70 W / 40 W |
| Chuck Capacity | 3–10 mm |
| Housing Material | Anodized Aluminum Body with PP Components |
| Dimensions (W×H×D) | 75 × 215 × 150 mm |
| Net Weight | 2.8 kg |
| Protection Class | IP30 (DIN EN 60529) |
| Operating Ambient | 5–40 °C, ≤80% RH |
Overview
The JEIO TECH MSA-0420 is a precision-engineered overhead stirrer designed for demanding laboratory applications requiring consistent rotational control, thermal stability, and robust mechanical performance. Utilizing a brushless DC motor architecture, the MSA-0420 delivers high torque output (19 N·cm) and exceptional speed stability across its full operational range of 80–2000 rpm—critical for reproducible mixing of low- to high-viscosity samples up to 20 L. Its integrated PID-controlled temperature regulation system maintains setpoint accuracy within ±0.5 °C over the 5–40 °C range, enabling synchronized heating and agitation without thermal overshoot or sample splashing. Unlike basic benchtop stirrers, the MSA-0420 employs closed-loop speed feedback to dynamically compensate for viscosity-induced load fluctuations—ensuring constant rotational velocity even during transitions from Newtonian to non-Newtonian behavior. This capability makes it suitable for applications governed by standardized protocols such as ASTM D1200 (viscosity measurement), ISO 2557-2 (polymer solution homogenization), and USP (dissolution apparatus auxiliary mixing).
Key Features
- Brushless DC motor delivering quiet, maintenance-free operation with high efficiency and extended service life
- PID-controlled speed regulation with real-time feedback ensures ±1% speed accuracy under variable load conditions
- Dual digital display showing both setpoint and actual rpm simultaneously for operator verification
- Integrated thermal management via anodized aluminum housing—acts as a passive heat sink to dissipate motor-generated heat during continuous operation
- Overload and overtemperature protection circuits compliant with IEC 61000-4 electromagnetic compatibility standards
- Compact footprint (75 × 215 × 150 mm) and lightweight design (2.8 kg) facilitate integration into multi-instrument workstations or fume hood environments
- Chuck accepts standard stirring shafts from 3 to 10 mm diameter; compatible with PTFE-coated, glass, and stainless-steel impellers
Sample Compatibility & Compliance
The MSA-0420 supports a broad spectrum of sample types—including aqueous buffers, polymer melts, colloidal suspensions, and viscous pharmaceutical formulations—up to 10,000 cP at reduced speeds. Its IP30-rated enclosure provides protection against solid objects ≥2.5 mm but is not intended for wet or corrosive atmospheres; users must ensure ambient humidity remains ≤80% RH and ambient temperature stays within 5–40 °C. The device conforms to CE marking requirements under the Low Voltage Directive (2014/35/EU) and Electromagnetic Compatibility Directive (2014/30/EU). While not certified for GMP manufacturing environments, its stable speed control, audit-ready parameter logging (when paired with optional RS-232/USB interface), and traceable calibration support GLP-compliant workflows in QC labs conducting method validation per ICH Q2(R2).
Software & Data Management
The MSA-0420 operates as a standalone instrument with no embedded firmware-based data logging. However, optional analog voltage output (0–10 V) and digital RS-232/USB interfaces enable external acquisition of real-time rpm and temperature signals using third-party SCADA systems or LabVIEW-based monitoring platforms. When connected to validated software, the unit supports time-stamped parameter recording for regulatory traceability. All control logic—including ramp-up/ramp-down profiles, hold times, and thermal stabilization sequences—is executed locally via microprocessor-based PID algorithms meeting the functional safety principles outlined in IEC 61508 SIL-1.
Applications
- Homogenization of cell culture media and bioreactor feedstock solutions prior to sterilization
- Preparation of uniform emulsions and suspensions in formulation development (e.g., topical gels, oral suspensions)
- Accelerated stability testing where controlled agitation simulates transport-induced shear
- Viscometric pre-conditioning of polymer solutions before rheological characterization on rotational rheometers
- Controlled dissolution studies supporting USP Apparatus 2 (paddle) auxiliary mixing protocols
- Environmental sample preparation—including soil slurry homogenization and wastewater digestate mixing—under ISO 5667-3 compliance
FAQ
Is the MSA-0420 suitable for use inside a CO₂ incubator?
No. The unit is rated for ambient operation only (5–40 °C, ≤80% RH) and lacks ingress protection against condensation or elevated CO₂ concentrations.
Can it be used with magnetic stir bars?
No. The MSA-0420 is an overhead mechanical stirrer and does not incorporate magnetic coupling; it requires direct-shaft impeller attachment.
What impeller types are recommended for high-viscosity mixing?
Anchor, helical ribbon, or pitched-blade turbines mounted on stainless-steel shafts are advised for viscosities above 5,000 cP.
Does the device support external start/stop triggering?
Yes—via TTL-level digital input when configured with the optional remote control module (sold separately).
Is calibration documentation provided with shipment?
A factory calibration certificate verifying speed and temperature accuracy at three points across the operating range is available upon request prior to dispatch.
