PRIMIX HOMOGENIZING DISPER Model 2.5 (5 L) High-Speed Disperser
| Brand | Primix |
|---|---|
| Origin | Japan |
| Model | HOMOGENIZING DISPER Model 2.5 (5 L) |
| Motor | 220 V, 0.25 kW |
| Speed Range | 500–6,000 rpm |
| Maximum Batch Volume | 5 L |
| Wetted Parts Material | SUS304 / SUS329J1 |
| Drive Type | Brushless DC Motor |
| Control Interface | Analog speed adjustment knob, ammeter, runtime counter |
| Net Weight | ~12 kg |
| Stirrer Head | Removable and tool-free for cleaning |
| Compatibility | Non-interchangeable with HOMOGENIZING MIXER MARK II Model 2.5 stirrer heads |
Overview
The PRIMIX HOMOGENIZING DISPER Model 2.5 is a benchtop high-shear disperser engineered for reproducible, scalable dispersion of suspensions, emulsions, and pigment pastes in laboratory and pilot-scale R&D environments. It operates on the principle of rotor-stator high-shear homogenization: rotational energy from a precision brushless DC motor is transmitted to a dynamically balanced dispersing head, generating intense hydrodynamic shear, cavitation, and turbulent mixing within the liquid phase. This mechanism enables efficient particle deagglomeration, droplet size reduction, and uniform distribution of insoluble phases—critical for formulation development in coatings, pharmaceuticals, cosmetics, and advanced materials. Designed for operation with batch volumes up to 5 L, the unit supports method transfer from lab to small-batch production while maintaining consistent process parameters under variable viscosity conditions.
Key Features
- Brushless DC motor delivering stable rotational speed across the full 500–6,000 rpm range—including precise low-speed control (<1,000 rpm) essential for heat-sensitive or shear-thinning formulations.
- Removable dispersing head with quick-release mechanism; no tools required for disassembly, enabling rapid cleaning and cross-formulation changeover without risk of cross-contamination.
- Wetted components constructed from corrosion-resistant austenitic stainless steel (SUS304) and duplex stainless steel (SUS329J1), ensuring compatibility with mildly acidic, alkaline, and organic solvent-based systems per ISO 8502-9 surface cleanliness standards.
- Analog control interface featuring an intuitive speed adjustment knob, real-time ammeter (for load monitoring and torque estimation), and cumulative runtime counter—supporting preventive maintenance scheduling per GLP-compliant equipment logs.
- Acoustically optimized mechanical architecture achieving sound pressure levels <72 dB(A) at 1 m distance, meeting ISO 7779 noise emission requirements for shared laboratory environments.
Sample Compatibility & Compliance
The HOMOGENIZING DISPER Model 2.5 accommodates Newtonian and non-Newtonian liquids with viscosities up to 10,000 mPa·s (measured at 25°C, spindle #2, 10 rpm). Compatible sample types include aqueous polymer dispersions, oil-in-water emulsions, ceramic slurries, conductive ink precursors, and pharmaceutical nanosuspensions. The unit complies with IEC 61000-6-2 (immunity) and IEC 61000-6-4 (emission) electromagnetic compatibility directives. While not certified as explosion-proof, its non-sparking brushless drive meets Class I, Division 2 electrical safety expectations when operated in well-ventilated fume hoods per NFPA 45 guidelines. Documentation includes CE Declaration of Conformity and RoHS 2 compliance statement.
Software & Data Management
This model operates as a standalone analog-controlled instrument with no embedded digital firmware or data export capability. All operational parameters—including speed setpoint, actual runtime, and motor current draw—are manually recorded for audit trail integrity. For laboratories requiring electronic records, integration with external data acquisition systems (e.g., LabVIEW or SCADA via 4–20 mA analog output signal) is feasible using optional third-party interface modules. Such configurations support 21 CFR Part 11-compliant electronic signatures when paired with validated software platforms and user access controls.
Applications
- Preparation of stable pigment dispersions for inkjet inks and architectural coatings (ASTM D1210 fineness-of-grind testing).
- Rapid screening of surfactant efficacy in O/W and W/O emulsion stabilization (ISO 11711).
- Homogenization of active pharmaceutical ingredient (API) suspensions prior to lyophilization or tablet granulation.
- Deagglomeration of nanostructured metal oxides (e.g., TiO₂, SiO₂) in colloidal silica sols for optical coating R&D.
- Batch-wise processing of conductive pastes containing silver flakes or carbon nanotubes for printed electronics prototyping.
FAQ
Is the dispersing head interchangeable with the HOMOGENIZING MIXER MARK II series?
No. The HOMOGENIZING DISPER Model 2.5 uses a proprietary shaft geometry and locking interface; stirrer heads are mechanically and dimensionally incompatible with the MARK II platform.
What maintenance intervals are recommended for the brushless motor?
No scheduled lubrication or commutator servicing is required. Annual verification of thermal protection circuit response and calibration of the ammeter against a traceable multimeter is advised per ISO/IEC 17025 internal calibration procedures.
Can this unit be used under inert atmosphere conditions?
Yes—provided the vessel is sealed and rated for positive pressure (≤0.2 bar gauge), and the dispersing head shaft seal is verified for gas retention. Optional nitrogen purge ports may be added via custom adapter kits.
Does PRIMIX provide IQ/OQ documentation packages?
Factory-issued Installation Qualification (IQ) templates and Operational Qualification (OQ) test protocols are available upon request and can be executed by authorized service engineers in accordance with ASTM E2500-13 guidance for equipment qualification.
