Prema HM-300 High-Torque Digital Homogenizer

Overview

The Prema HM-300 is a benchtop high-torque digital homogenizer engineered for precise, reproducible mechanical dispersion, emulsification, and homogenization of viscous and heterogeneous liquid-phase samples in regulated laboratory and pilot-scale production environments. Operating on the principle of high-shear rotor-stator interaction, the HM-300 generates controlled hydrodynamic cavitation and laminar-to-turbulent transition within the sample volume, enabling efficient particle size reduction, phase stabilization, and uniform suspension formation. Its core architecture integrates a brushless DC motor with closed-loop torque feedback, ensuring consistent rotational energy delivery across the full 0–12,000 rpm speed range—critical for applications where shear history directly impacts colloidal stability, active pharmaceutical ingredient (API) suspension integrity, or polymer dispersion morphology.

Key Features

• 550 W brushless DC motor with real-time current monitoring and automatic torque compensation—maintains set speed under variable load conditions without manual intervention
• Digital keypad interface with large-format LED RPM display and programmable timer (00:00 to 99:59 hours:minutes); auto-stop with audible alert upon completion
• SUS316 stainless steel rotor-stator homogenizing head—certified for compatibility with aggressive solvents, acidic/basic formulations, and GMP-compliant cleaning agents
• Spring-assisted vertical lift mechanism (standard on HM-300/310 variants)—enables rapid, repeatable positioning of the homogenizer shaft with sub-millimeter depth control
• Vibration-damped aluminum alloy housing with chemically resistant epoxy-polyester coating—designed to withstand repeated exposure to organic solvents, surfactants, and aqueous electrolytes
• Integrated safety architecture: thermal cutoff fuse, obstruction detection circuitry, and on-screen error code display (e.g., E1 = overload, E2 = sensor fault)

Sample Compatibility & Compliance

The HM-300 accommodates sample volumes from 100 mL to 2 L in standard cylindrical glass or stainless-steel vessels (diameter ≥ 40 mm, depth ≥ 120 mm). It supports Newtonian and moderately non-Newtonian fluids (up to ~50,000 mPa·s at low shear), including o/w and w/o emulsions, pigment dispersions, polymer melts, and biopolymer suspensions. The SUS316 wetted path meets ASTM F899-22 requirements for corrosion resistance in chemical processing equipment. While not intrinsically certified for ISO 13485 or FDA 21 CFR Part 11, its digital logging capability (RPM, time, error events) supports GLP/GMP-aligned documentation when integrated into validated lab workflows. Traceable calibration of speed output is achievable using NIST-traceable tachometers per ISO/IEC 17025 guidelines.

Software & Data Management

The HM-300 operates as a standalone instrument with embedded microcontroller firmware—no external PC or proprietary software required. All operational parameters (set speed, elapsed time, total run cycles, fault logs) are retained in non-volatile memory and accessible via front-panel navigation. For audit-ready environments, users may manually record timestamped RPM/time entries into electronic lab notebooks (ELN) or LIMS systems. Optional RS-232 or USB-to-serial adapters (sold separately) enable basic ASCII data streaming (e.g., “RPM=8420,T=00:14:22,ERR=NONE”) for integration with custom Python- or LabVIEW-based acquisition scripts.

Applications

• Pharmaceutical: Homogenization of topical suspensions (e.g., zinc oxide, titanium dioxide), nanoemulsion pre-formulation, and excipient dispersion prior to lyophilization
• Personal Care: Stable silicone-in-water emulsions for cosmetics, fragrance oil dispersion in aqueous bases, and rheology modifier deagglomeration
• Coatings & Inks: Pigment milling and stabilization in acrylic/epoxy resins, conductive nanoparticle dispersion for functional coatings
• Chemical R&D: Catalyst slurry homogenization, surfactant micelle characterization prep, and polymer blend compatibilization studies
• Academic Research: Controlled shear history experiments for colloidal stability assessment (e.g., DLVO modeling validation) and rheo-optical correlation studies

FAQ

What is the maximum viscosity the HM-300 can process continuously at 12,000 rpm?
At full speed, continuous operation is recommended for viscosities ≤ 10,000 mPa·s (measured at 100 s⁻¹, 25°C) in volumes ≤ 1 L. Higher viscosities require reduced speed or pulsed operation to prevent thermal overload.
Is the homogenizer head autoclavable?
No—SUS316 construction permits chemical sterilization (e.g., 2% glutaraldehyde, 70% ethanol) but not steam autoclaving (>121°C), which may compromise rotor-stator dimensional tolerances.
Can the timer be disabled for manual operation?
Yes—setting the timer to “00:00” disables auto-stop; operation continues until the STOP button is pressed or a safety fault is triggered.
Does the HM-300 meet IP rating requirements for splash resistance?
It carries no formal IP rating; the chassis is designed for dry-lab use only. Liquid ingress into ventilation slots or control panel must be avoided.
How often should the motor brushes be replaced?
As a brushless DC motor, the HM-300 has no consumable brushes—expected service life exceeds 15,000 operating hours under nominal load conditions.