Interscience BagMixer® 400cc Laboratory Homogenizer

Overview

The Interscience BagMixer® 400cc Laboratory Homogenizer is a precision-engineered, benchtop paddle-beater homogenizer designed for standardized, reproducible sample preparation in microbiological, food safety, pharmaceutical, and environmental testing laboratories. It operates on the principle of controlled mechanical shearing—using reciprocating paddle motion within sterile, single-use Stomacher®-compatible bags—to achieve uniform dispersion and microbial release from solid, semi-solid, or viscous matrices. Unlike rotor-stator or ultrasonic systems, the BagMixer® employs non-invasive, bag-based homogenization that eliminates cross-contamination risk, prevents aerosol generation, and ensures full compliance with ISO 6887-1, ISO 11290-1, AOAC 990.12, and FDA BAM Chapter 3 protocols. Its compact footprint, brushless motor architecture, and optimized force transmission deliver consistent energy input across the full 50–400 mL volume range—critical for quantitative recovery of target microorganisms (e.g., Salmonella, Listeria, E. coli) in regulatory-compliant enumeration workflows.

Key Features

• Q-Tight® Sealing System: Patented dual-clamp mechanism ensures hermetic, leak-proof closure of homogenization bags—even with high-viscosity or particulate-laden samples—eliminating fluid egress during operation and supporting GLP-aligned documentation.
• Click & Clean® Detachable Blades: Tool-free, autoclavable stainless-steel paddles mount in parallel parking configuration for rapid insertion and removal of bags; blade geometry is optimized for laminar shear distribution and minimal sample adhesion.
• Digital Parameter Control: Fully programmable interface enables independent adjustment of stroke frequency (4/6/8/10 strokes/sec), duration (1 s–59 min or continuous mode), and applied force (up to 28 kg peak thrust), enabling method-specific optimization per matrix type (e.g., raw meat vs. dried herbs).
• Ergonomic 270° Hinged Door: Front-access design with lightweight (950 g), balanced door allows unobstructed bag loading and visual monitoring through the shatter-resistant polycarbonate viewing window—reducing operator fatigue and improving workflow efficiency.
• Robust Stainless Steel Architecture: Entire housing, chamber, and drive components are constructed from electropolished AISI 316 stainless steel, ensuring corrosion resistance, cleanability, and compatibility with ethanol, hydrogen peroxide vapor (HPV), and other lab-grade disinfectants.
• Noise-Optimized Brushless Motor: Low-vibration, maintenance-free motor delivers stable torque output across voltage ranges (100–240 V, 50–60 Hz), meeting ISO 15707 acoustic emission limits (<55 dB(A) at 1 m).

Sample Compatibility & Compliance

The BagMixer® 400cc accommodates standard 400 mL stomacher bags (including Interscience’s certified sterile, DNA-free, and low-binding variants) as well as 50–200 mL mini-bags—enabling scalable processing from screening-level enrichment to confirmatory analysis. It supports heterogeneous matrices including ground meats, leafy greens, dairy powders, soil suspensions, and clinical swab eluates. All operational parameters are traceable via the digital display, and the device meets CE marking requirements under Directive 2014/30/EU (EMC) and 2014/35/EU (LVD). When integrated into validated laboratory information management systems (LIMS), its repeatable cycle execution supports 21 CFR Part 11-compliant electronic records when paired with audit-trail-enabled software interfaces.

Software & Data Management

While the BagMixer® 400cc operates as a standalone instrument with embedded firmware, its parameter settings—including speed, time, and force level—are retained in non-volatile memory between power cycles. For labs requiring electronic recordkeeping, Interscience offers optional connectivity modules (e.g., RS-232 or USB-to-serial adapters) compatible with third-party LIMS or ELN platforms. The device’s deterministic behavior—no drift in stroke timing or force delivery over >100,000 cycles—ensures long-term method equivalence and facilitates IQ/OQ/PQ validation per ISO/IEC 17025:2017 Annex A.4 requirements.

Applications

• Microbial enumeration (ISO 7218, USP , EP 2.6.12) in food, feed, and cosmetics
• Pathogen enrichment preparation prior to PCR or immunoassay detection
• Environmental surface sampling (ISO 18593) and water filter elution
• Pharmaceutical raw material homogenization for bioburden testing (USP )
• Pre-analytical sample conditioning for MALDI-TOF MS colony suspension
• Standardized dilution series preparation in accredited reference labs

FAQ

Is the BagMixer® 400cc suitable for use with hazardous or biohazardous samples?

Yes—when used with certified leak-proof bags and operated inside a biosafety cabinet, it complies with BSL-2 containment requirements per CDC/NIH guidelines.
Can I validate my homogenization method using this instrument?

Absolutely—the device’s fixed mechanical parameters, absence of consumable wear parts (except blades), and reproducible force profile make it ideal for method validation per ISO 17025 Clause 7.2.2.
Does the Q-Tight® system accommodate non-Interscience branded bags?

It is mechanically compatible with all industry-standard 400 mL stomacher bags; however, optimal seal integrity and regulatory acceptance are guaranteed only with Interscience-certified bag lots.
How often should the Click & Clean® blades be replaced?

Under normal use (≤50 cycles/day), blades retain dimensional stability and surface finish for ≥2 years; replacement is recommended after visible pitting or deformation observed during routine visual inspection.
Is calibration required before first use or after maintenance?

No routine calibration is mandated—the device relies on factory-set mechanical tolerances and digital timing circuits; users perform functional verification using the built-in test mode per Interscience SOP-HM-001.