WIGGENS WB-502C DNA-VAC Vacuum Centrifugal Concentrator

Overview

The WIGGENS WB-502C DNA-VAC is a fully integrated vacuum centrifugal concentrator engineered for rapid, reproducible concentration and solvent removal from heat-sensitive biological samples—including nucleic acids (DNA/RNA), proteins, peptides, enzymes, hormones, and small-molecule analytes. It operates on the principle of simultaneous vacuum-assisted evaporation and controlled rotational force, enhanced by infrared (IR) radiation targeting the liquid surface—minimizing bulk thermal exposure while accelerating solvent vaporization. Unlike conventional heated vacuum ovens or nitrogen blow-down systems, the WB-502C combines precise temperature regulation (±0.1 °C), low-pressure vacuum (≤13 mbar), and gentle centrifugation (≤1500 rpm) within a chemically resistant, sealed chamber. Its integrated −20 °C cold trap ensures high-efficiency condensation of volatile solvents (e.g., ethanol, isopropanol, acetonitrile, chloroform), preventing backstreaming and preserving sample integrity. Designed for GLP-compliant laboratories, the system meets CE marking requirements and supports audit-ready operation through deterministic process parameters and stable thermal dynamics.

Key Features

• Infrared glass heating lid with dual-mode operation: IR-only, IR + conductive heating, or conductive-only—enabling selective surface energy delivery without overheating sample matrices.
• PTFE-coated corrosion-resistant diaphragm vacuum pump (WIGGENS C410), oil-free and maintenance-free, rated for aggressive organic and acidic vapors.
• Dual temperature sensing architecture: One sensor in the chamber wall and another embedded in the rotor bucket ensure real-time, spatially resolved thermal feedback for PID-controlled stability.
• Centralized vacuum inlet located at the top of the drive shaft—eliminating peripheral venting paths that cause cross-contamination or aerosol carryover between samples.
• Modular rotor system supporting multiple formats: 1.5 mL microtubes (132 positions), 15 mL conical tubes (12 positions), 50 mL tubes (8 positions), and dual 96-well plate carriers—all interchangeable without tools.
• Brushless DC motor delivering silent, vibration-damped rotation with smooth acceleration/deceleration profiles—critical for fragile precipitates and viscous lysates.
• Compact benchtop footprint (670 × 685 × 480 mm) with fully internalized vacuum and cooling subsystems—no external pumps, chillers, or compressors required.

Sample Compatibility & Compliance

The WB-502C accommodates aqueous and organic solvent systems commonly used in molecular biology workflows, including ethanol precipitation buffers, TE buffer, ammonium acetate solutions, and volatile extraction solvents. Its borosilicate glass chamber and PTFE-sealed components resist degradation from HCl, TFA, formic acid, and acetonitrile—ensuring long-term reliability in high-throughput core facilities. All operational parameters (temperature setpoint, timer, vacuum status, rotor speed) are logged internally with timestamping, satisfying traceability requirements under ISO/IEC 17025, FDA 21 CFR Part 11 (when paired with validated LIMS integration), and EU GMP Annex 11. The device conforms to IEC 61010-1 for laboratory electrical safety and carries CE certification for electromagnetic compatibility (EMC) and low-voltage directive compliance.

Software & Data Management

While the WB-502C operates via an intuitive LED touch interface without PC dependency, its parameter-driven architecture enables seamless integration into automated lab environments. All user-defined protocols—including multi-step temperature ramps, timed vacuum cycles, and speed transitions—are stored locally with 100+ programmable method slots. Event logs record start/stop times, achieved vacuum levels, actual vs. set temperature deviations, and fault codes (e.g., overtemperature, vacuum leak, rotor imbalance). Optional RS-232 or USB-to-serial interfaces support export of CSV-formatted run reports for QA documentation. For regulated environments, optional validation packages include IQ/OQ documentation templates aligned with ASTM E2500 and USP analytical instrument qualification guidelines.

Applications

• Routine post-PCR and post-sequencing cleanup: Concentration of desalted DNA fragments prior to Sanger sequencing, NGS library prep, or restriction digestion.
• Proteomics sample preparation: Lyophilization-equivalent concentration of tryptic digests, phosphopeptide enrichments, and affinity-purified complexes without denaturation.
• Clinical diagnostics: Rapid drying of extracted viral RNA from nasopharyngeal swabs prior to RT-qPCR amplification—reducing hands-on time and contamination risk.
• Metabolomics: Solvent exchange and concentration of polar metabolites (e.g., amino acids, organic acids) from cell lysates or biofluids using methanol/chloroform extraction protocols.
• Quality control labs: Residual solvent removal from reference standards and certified reference materials (CRMs) per ISO Guide 35 requirements.

FAQ

What solvents are compatible with the WB-502C’s cold trap and chamber?
Ethanol, isopropanol, methanol, acetonitrile, chloroform, ethyl acetate, and aqueous buffers are routinely processed. Avoid concentrated nitric acid, hydrofluoric acid, or halogenated solvents above 60 °C without prior consultation with WIGGENS technical support.
Can the WB-502C be used for lyophilization?
No—it is not a freeze dryer. The WB-502C performs vacuum centrifugation at ambient or elevated temperatures; it does not include shelf freezing capability or primary drying under sublimation conditions.
Is rotor imbalance detection available?
Yes—the system continuously monitors drive current and vibration signatures during rotation and will automatically decelerate if imbalance exceeds ISO 1940 G6.3 tolerance thresholds.
How often does the cold trap require defrosting?
Under typical nucleic acid ethanol precipitation workflows (2–4 runs/day), manual defrosting is required approximately every 5–7 days. A visual ice-level indicator is integrated into the trap housing.
Does the WB-502C support remote monitoring or network connectivity?
Not natively—but third-party LabView or Python-based SCADA integration is achievable via its RS-232 serial command protocol (SCPI-compatible syntax), enabling centralized fleet management in multi-instrument labs.