WIGGENS WB2000-M Compact Overhead Stirrer
| Brand | WIGGENS |
|---|---|
| Origin | Germany |
| Model | WB2000-M |
| Motor Type | Brushless DC |
| Max. Stirring Volume (Water) | 50 L |
| Speed Range | 40–2000 rpm |
| Speed Accuracy | ±1 rpm |
| Max. Viscosity | ≤20,000 cP |
| Torque | ≤70 N·cm |
| Power Input/Output | 70 W / 50 W |
| Clamp Diameter | ≤10 mm |
| Dimensions (W×D×H) | 105 × 160 × 185 mm |
| Display & Control | LED digital display + large rotary knob |
| Reversibility | No |
| Protection | Built-in overload protection, sealed low-noise housing |
Overview
The WIGGENS WB2000-M Compact Overhead Stirrer is an engineered solution for precise, reproducible, and continuous mechanical agitation in research, quality control, and production laboratories. Designed according to ISO 9001-certified manufacturing standards in Germany, this overhead stirrer operates on a brushless DC motor architecture—eliminating carbon brush wear, reducing thermal drift, and ensuring long-term speed stability under sustained load. Its core principle relies on direct-coupled torque transmission via a vertically aligned drive shaft, enabling consistent rotational energy transfer into viscous or heterogeneous liquid systems without slippage or speed deviation. The device is optimized for applications requiring controlled shear input across moderate viscosity ranges (up to 20,000 cP), including buffer preparation, polymer dissolution, suspension homogenization, and reagent blending. With a maximum rated capacity of 50 L in aqueous media and a calibrated speed range from 40 to 2000 rpm, the WB2000-M delivers high repeatability in both routine and method-critical workflows.
Key Features
- Brushless DC motor with integrated microprocessor-based closed-loop speed feedback—ensuring ±1 rpm accuracy across the full operating range
- Compact footprint (105 × 160 × 185 mm) and lightweight aluminum-alloy housing with corrosion-resistant surface treatment for compatibility with acidic, alkaline, or solvent-rich lab environments
- Top-entry shaft design: allows full-length stirring rods to pass through the unit without height adjustment—enabling rapid setup and flexible vessel positioning
- Large tactile rotary control knob with glove-compatible ergonomics and real-time LED digital readout for intuitive, error-resistant operation
- Sealed, low-noise gearhead assembly (<55 dB(A) at 1 m) and soft-start functionality (ramp-up from 40 rpm) to minimize splashing and improve operator safety
- Built-in electronic overload protection that automatically disengages torque output upon excessive load detection—preserving motor integrity and experimental continuity
Sample Compatibility & Compliance
The WB2000-M accommodates standard laboratory vessels—including glass beakers, stainless-steel reactors, and jacketed flasks—via its universal clamp interface (max. 10 mm shaft diameter). It supports stirring of Newtonian and mildly non-Newtonian fluids (e.g., PVA solutions, colloidal suspensions, cell culture media) within defined viscosity and density constraints. The unit complies with IEC 61010-1:2010 for electrical safety in laboratory equipment and meets EMC requirements per EN 61326-1. While not certified for hazardous area use (ATEX/IECEx), it is suitable for general-purpose labs operating under GLP and ISO/IEC 17025 frameworks. All firmware logic adheres to deterministic timing protocols to support audit-ready documentation practices.
Software & Data Management
The WB2000-M operates as a standalone instrument with no external software dependency. However, its digital speed readout and stable analog signal path enable seamless integration with third-party data acquisition systems via optional analog voltage output modules (0–10 V corresponding to 0–2000 rpm). For regulated environments, users may implement manual logbook entries or connect to LIMS platforms using RS-232 or USB-to-serial adapters (sold separately). Firmware does not store historical run data but supports 21 CFR Part 11-compliant procedural controls when paired with validated SOPs and electronic signature workflows managed externally.
Applications
- Preparation of standardized buffers and calibration standards in analytical chemistry labs
- Homogenization of particulate suspensions prior to filtration or particle size analysis
- Controlled dissolution testing of pharmaceutical excipients and active ingredients
- Mixing of high-density electrolyte solutions for battery R&D and electrochemical characterization
- Stirring during titration, enzymatic assays, and microbial growth media conditioning
- Supporting ASTM D2196 (viscosity of paints) and USP <701> (dissolution apparatus qualification) auxiliary mixing steps
FAQ
Is the WB2000-M compatible with non-aqueous solvents such as acetone or ethanol?
Yes—provided the stirring rod material (e.g., PTFE-coated stainless steel or glass) is chemically resistant and the vessel remains adequately vented. Avoid prolonged exposure to chlorinated solvents that may degrade O-rings.
Can this stirrer maintain set speed when viscosity increases during a reaction?
Within its torque limit (≤70 N·cm), the closed-loop control system dynamically adjusts power delivery to sustain target rpm. Beyond 20,000 cP or under sudden viscosity spikes, overload protection may activate.
Does the unit support external triggering or remote start/stop commands?
No native digital I/O is provided; however, relay-based remote control can be implemented via the power supply line using industrial-grade timers or PLC interfaces.
What maintenance is required for long-term reliability?
None beyond periodic visual inspection of the shaft coupling and cleaning of the housing with isopropyl alcohol. The brushless motor requires no scheduled servicing over its rated service life (>20,000 hours).
Is calibration documentation available for ISO/IEC 17025 traceability?
Factory calibration certificates (traceable to PTB, Germany) are supplied with each unit. On-site verification using NIST-traceable tachometers is recommended annually for critical applications.
