WIGGENS VB424 Multi-Position Pulsed Vortex Mixer

Overview

The WIGGENS VB424 Multi-Position Pulsed Vortex Mixer is an engineered solution for high-throughput, reproducible vortex mixing of multiple samples simultaneously in laboratory environments where consistency, chemical resistance, and operational flexibility are critical. Based on controlled orbital oscillation combined with programmable pulse interruption, the VB424 generates consistent turbulent flow patterns within tubes and microplates—enabling efficient homogenization, resuspension, and reagent dispersion without requiring manual intervention. Unlike continuous-mode vortexers, its pulsed operation introduces deliberate pauses between oscillation cycles, allowing fluid stratification to relax and promoting vertical convection that enhances mixing uniformity—particularly beneficial for viscous or density-stratified samples. Designed for routine QC workflows, bioprocessing support, clinical diagnostics preparation, and analytical sample conditioning, the VB424 operates across a broad speed range (100–2,000 rpm) while maintaining mechanical stability and low thermal drift under extended duty cycles.

Key Features

• Pulsed vortex mode with adjustable on/off timing intervals to optimize mixing efficiency for heterogeneous or sediment-prone samples
• Dual-anodized aluminum chassis and oxidized upper housing provide exceptional resistance to common laboratory solvents, diluted acids (e.g., HCl, HNO₃ up to 10% v/v), and alkaline solutions
• Brushless DC motor with integrated filtering ensures precise speed control, minimal torque ripple, and extended service life (>20,000 hours MTBF)
• Modular sample holder system compatible with standardized tube diameters (10–29 mm), 96-well plates, Eppendorf tubes, conical flasks (125–250 mL), and volumetric flasks (50–250 mL)
• Real-time visual access during operation—no lid obstruction—enabling concurrent monitoring, pipetting, or reagent addition without interrupting the mixing cycle
• Stable base design with non-slip silicone feet prevents lateral displacement even at maximum rotational speeds
• Compliant with IEC 61010-1:2010 safety standards for electrical equipment used in laboratory environments

Sample Compatibility & Compliance

The VB424 supports a wide array of container formats via interchangeable, chemically inert foam-insert sample holders—including polypropylene and glass test tubes (10–29 mm OD), 1.5–2.0 mL microcentrifuge tubes, 96-well PCR plates (flat-bottom and skirted), and borosilicate conical flasks. All foam inserts meet ISO 10993-5 cytotoxicity requirements and exhibit no measurable leachables when exposed to aqueous buffers, ethanol, or isopropanol. The device is suitable for use in GLP-compliant laboratories performing method validation per USP (bacterial endotoxins) and ASTM D2777 (standard practice for determining precision and bias of applicable test methods). Its construction avoids halogenated flame retardants and complies with RoHS Directive 2011/65/EU.

Software & Data Management

While the VB424 operates as a standalone analog-controlled instrument (no embedded firmware or digital interface), it is fully compatible with external process documentation systems. Users may integrate it into electronic lab notebook (ELN) workflows by logging operating parameters—speed, duration, pulse interval, and holder configuration—via manual entry or barcode-scanned SOP references. For regulated environments requiring audit trails, the device can be paired with time-stamped video recording or connected to programmable logic controllers (PLCs) via optional 0–10 V analog output modules (sold separately). No internal data storage or network connectivity is present, ensuring compliance with FDA 21 CFR Part 11 when used in conjunction with validated third-party documentation platforms.

Applications

• Routine dissolution testing of pharmaceutical powders and tablets using volumetric flasks (LC-series holders)
• Pre-analytical sample homogenization for clinical chemistry assays—especially whole blood, serum, and urine matrices
• Cell pellet resuspension prior to flow cytometry or ELISA plate loading
• Standard solution preparation in environmental labs (e.g., heavy metal calibration standards in nitric acid media)
• Enzyme reaction quenching and mixing in kinetic assay development
• Quality control of excipient blends in solid-dose manufacturing (per ICH Q5C guidelines)

FAQ

Is the VB424 suitable for mixing volatile organic solvents?
Yes—the anodized aluminum housing and ABS frame resist degradation from acetone, chloroform, methanol, and ethyl acetate. However, prolonged exposure to concentrated THF or DMF is not recommended without periodic inspection of foam insert integrity.
Can the pulse interval be customized beyond factory settings?
No—the pulse function provides fixed on/off timing (default 3 s on / 1 s off); variable pulse programming requires external timer integration.
What is the maximum allowable load imbalance across positions?
Load distribution must remain within ±5% mass variance across all occupied positions to maintain mechanical stability and avoid resonance-induced vibration amplification.
Does the VB424 comply with GMP documentation requirements?
As a Class I electrical device with no internal memory or user-modifiable settings, it satisfies baseline GMP Annex 15 expectations for equipment qualification when accompanied by documented IQ/OQ protocols and preventive maintenance logs.
Are replacement foam inserts certified for sterile applications?
Foam inserts are not autoclavable or gamma-irradiated; they are intended for single-user, non-sterile benchtop use. Sterile alternatives require third-party validation and are not supplied by WIGGENS.