WIGGENS HG400 Pro Stomacher-type Homogenizer

Overview

The WIGGENS HG400 Pro Stomacher-type Homogenizer is an ISO 13485-certified, CE-marked laboratory instrument engineered for reproducible, aseptic mechanical homogenization of solid and semi-solid biological samples. Operating on the principle of controlled percussive shear—where dual stainless-steel paddles reciprocate within a sealed sterile bag—the device applies calibrated mechanical stress to disrupt tissue architecture while preserving microbial viability and cellular integrity. Unlike rotor-stator or ultrasonic systems, stomacher homogenization avoids localized heating, cavitation damage, or metal leaching, making it the method of choice for microbiological enumeration (e.g., ISO 6887-1, AOAC 990.12), pathogen recovery from food matrices, and gentle cell suspension preparation in clinical and pharmaceutical QC workflows. Its brushless DC motor ensures stable torque delivery across the full speed range (60–600 rpm), while the adjustable beating distance (0.5–16.5 mm) enables fine-tuned control over shear intensity—critical for optimizing extraction efficiency without lysing target microorganisms.

Key Features

• Tempered glass viewing window for real-time monitoring of homogenization progress without interrupting operation
• Brushless DC motor with zero carbon wear, delivering >10,000-hour service life and consistent rotational stability under load
• Microprocessor-controlled timer (1 s – 59 min 59 s) and speed regulation with ±2 rpm accuracy
• Automated paddle alignment system: blades retract and parallelize at end-of-cycle to prevent bag puncture during removal
• Integrated safety drip tray capturing incidental leakage—eliminating bench contamination and enabling GLP-compliant documentation
• Stainless steel housing with antimicrobial powder coating (ISO 22196 compliant), resistant to ethanol, isopropanol, and quaternary ammonium disinfectants
• Tool-free paddle removal for rapid cleaning validation and routine maintenance

Sample Compatibility & Compliance

The HG400 Pro accommodates standard ISO-compliant stomacher bags (e.g., 400 mL polyethylene with or without filtration mesh) and supports sample volumes from 50 mL to 400 mL—including viscous tissues (muscle, liver), fibrous plant matter (leafy greens, root vegetables), and composite food products (cheese, cured meats). All contact surfaces are non-porous and autoclavable (121°C, 20 min), ensuring compliance with USP , EU GMP Annex 1, and ISO/IEC 17025 requirements for traceability and contamination control. The system’s closed-bag architecture eliminates aerosol generation and cross-sample carryover, satisfying biosafety Level 2 (BSL-2) containment protocols per CDC/NIH guidelines. Optional software-enabled operation provides full audit trail functionality—including user ID, timestamp, speed, duration, and cycle count—meeting FDA 21 CFR Part 11 electronic record requirements when paired with validated LIMS integration.

Software & Data Management

The HG400 Pro offers both standalone and PC-connected operation modes. In standalone mode, all parameters are stored in non-volatile memory with battery-backed retention (>10 years). For regulated environments, optional WIGGENS Homogenizer Control Suite (v3.2+) enables remote parameter configuration, method locking, digital signature authentication, and export of CSV-formatted logs compliant with ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate). Data fields include operator ID, batch number, sample ID, homogenization profile (speed ramp, dwell time, total cycles), and environmental timestamp. Software validation packages (IQ/OQ/PQ) are available upon request for GxP implementation.

Applications

• Food safety testing: Enumeration of Salmonella, Listeria monocytogenes, and E. coli O157:H7 per ISO 6579-1 and FDA Bacteriological Analytical Manual (BAM) Chapter 4
• Clinical microbiology: Recovery of fastidious organisms from wound swabs, stool specimens, and tissue biopsies prior to culture or PCR
• Pharmaceutical QC: Extraction of microbial contaminants from raw materials (herbs, excipients) and finished dosage forms per USP /
• Veterinary diagnostics: Homogenization of animal feed, carcass swabs, and environmental samples for zoonotic pathogen screening
• Academic research: Preparation of single-cell suspensions from murine spleen, tumor xenografts, or plant callus without enzymatic digestion

FAQ

What is the maximum allowable sample volume for the HG400 Pro?
The device is validated for 50–400 mL sample volumes using standard ISO-compliant stomacher bags; overfilling beyond 400 mL compromises homogenization uniformity and increases risk of bag rupture.
Can the HG400 Pro be used for anaerobic sample processing?
Yes—when paired with gas-impermeable, pre-reduced anaerobic stomacher bags (e.g., AnaeroGen™-compatible), the system maintains strict O₂ exclusion throughout homogenization.
Is calibration required before first use?
No routine calibration is needed; however, annual verification of timer accuracy (±0.5 s) and speed consistency (±2 rpm) using NIST-traceable tachometer and stopwatch is recommended for ISO/IEC 17025 accreditation.
How does the adjustable beating distance affect microbial recovery efficiency?
Reducing beating distance (12 mm) enhances disruption of fibrous or fatty matrices without compromising colony-forming unit (CFU) viability.
Are replacement paddles and viewing windows available as spare parts?
Yes—WIGGENS part numbers HG-PADDLE-PRO (stainless steel, autoclavable) and HG-VIEWGLASS-PRO (tempered borosilicate, scratch-resistant) are stocked globally with 48-hour lead time.