Pharmag L-Series Liquid Mixer for Laboratory and Bioprocessing Applications

Overview

The Pharmag L-Series Liquid Mixer is a precision-engineered laboratory-scale mixing system designed for reproducible homogenization of low- to medium-viscosity fluids in life science, pharmaceutical development, and bioprocess R&D environments. Based on the principle of mechanical agitation via a vertically mounted impeller driven by a brushless DC motor, the system delivers controlled shear input and uniform radial flow patterns—critical for achieving consistent dispersion, suspension stability, and phase integration in formulations such as aqueous buffers, cell culture media, emulsions, and particulate suspensions. Its modular architecture supports both benchtop operation and integration into controlled environment cabinets or cleanroom-compatible workflows. Unlike orbital shakers or vortex mixers, the L-Series provides scalable torque delivery and laminar-to-turbulent transition control—enabling users to correlate small-scale mixing parameters with downstream pilot- or production-scale bioreactor conditions.

Key Features

• Stainless steel 316L mixing vessel (5 L total volume, 3 L nominal working volume) with polished interior surface (Ra ≤ 0.8 µm) to minimize microbial adhesion and facilitate cleaning validation.
• Adjustable-height stainless steel mixing arm with interchangeable impellers (Rushton turbine, pitched-blade, and anchor types available as optional accessories) to match fluid rheology and mixing objectives.
• Digital speed controller with real-time RPM display, memory function for up to 5 preset protocols, and ramp-up/ramp-down profiles to prevent splashing or foaming during initiation/termination.
• Brushless DC motor delivering high starting torque and stable rotational output across the full 50–1,200 rpm range—with <±0.5% speed accuracy under load and <0.2% speed drift over 8-hour continuous operation.
• IP54-rated housing with integrated thermal overload protection and emergency stop button compliant with EN 60204-1 safety standards.
• Low-vibration base design with silicone-damped feet, reducing transmitted mechanical noise to <55 dB(A) at 1 m distance—suitable for shared lab spaces and QC laboratories.

Sample Compatibility & Compliance

The L-Series accommodates Newtonian and mildly non-Newtonian liquids with dynamic viscosities ranging from 1 mPa·s (deionized water) to 5,000 mPa·s (glycerol–water mixtures), including sterile-filtered media, protein-containing solutions, and micronized suspension formulations. It is routinely validated for use in GLP-compliant analytical method development and USP <797> compounding environments. All wetted parts comply with USP Class VI biocompatibility requirements and are compatible with common CIP agents (e.g., 1–2% NaOH, 0.5% phosphoric acid). Documentation packages include Factory Acceptance Test (FAT) reports, material certifications (EN 10204 3.1), and EU Declaration of Conformity.

Software & Data Management

While the base unit operates via standalone digital interface, optional USB-C connectivity enables integration with Pharmag’s LabLink™ PC software (v3.2+). This platform supports audit-trail-enabled protocol logging, time-stamped RPM and torque event capture, export of CSV-formatted mixing logs, and alignment with FDA 21 CFR Part 11 requirements when deployed with Windows-domain authentication and electronic signature modules. Data integrity safeguards include write-protected archive folders, automatic backup to network drives, and configurable user access levels (Operator, Supervisor, Administrator).

Applications

• Preparation of homogeneous cell culture media and transfection reagent complexes prior to bioreactor inoculation.
• Blending of active pharmaceutical ingredients (APIs) with excipients in liquid dosage form development (e.g., oral suspensions, ophthalmic solutions).
• Stabilization studies of nanoemulsions and liposomal dispersions under defined shear history.
• QC testing of viscosity-sensitive formulations per ASTM D2196 or ISO 2555 protocols using calibrated reference fluids.
• Supporting DOE-based optimization of mixing parameters (rpm, duration, impeller geometry) for process transfer between R&D and manufacturing scales.

FAQ

Is the mixing vessel autoclavable?
Yes—the 316L stainless steel vessel and standard impeller assembly are fully autoclavable at 121°C for 20 minutes. Validation of cycle compatibility is included in the optional IQ/OQ documentation package.
Can the mixer be used under inert gas atmosphere?
The standard vessel includes a sealed lid port for gas inlet/outlet tubing; optional pressure-rated lid (max. 1.5 bar(g)) and gas purge adapters are available for anaerobic or oxygen-sensitive applications.
What maintenance is required?
No routine lubrication is needed due to the brushless motor design. Annual verification of speed calibration and impeller runout (≤0.05 mm TIR) is recommended per ISO/IEC 17025 guidelines.
Does Pharmag offer GMP-compliant documentation?
Yes—full validation support (DQ/IQ/OQ/PQ), traceable calibration certificates, and raw material test reports are available upon request for regulated environments.
How is speed accuracy verified during qualification?
Speed accuracy is confirmed using a NIST-traceable handheld tachometer (±0.1% uncertainty) across three load points (empty, 1.5 L water, 3 L 40% glycerol), per ASTM E2500-13 Annex A3.