WIGGENS WB2000-C Overhead Stirrer

Overview

The WIGGENS WB2000-C Overhead Stirrer is an engineered solution for precision-controlled, high-reliability mixing in research laboratories, quality control environments, and pilot-scale chemical or pharmaceutical development workflows. Designed around a brushless DC motor architecture, it eliminates carbon brush wear—ensuring consistent torque delivery, extended service life, and maintenance-free operation under continuous high-load conditions. Its overhead configuration enables stable, vibration-damped agitation of large-volume vessels (up to 50 L), while the through-hole design allows unimpeded vertical adjustment of the stirring shaft without repositioning the entire unit—optimizing setup flexibility for reactors, jacketed flasks, and multi-port reaction systems. The device operates on a closed-loop microprocessor-controlled speed regulation system, maintaining setpoint accuracy within ±1 rpm across its full 20–2000 rpm range. This level of repeatability supports GLP-compliant documentation protocols and meets the operational rigor expected in ISO 17025-accredited testing laboratories.

Key Features

• Brushless DC motor with thermal overload protection and automatic shutdown—engineered for uninterrupted operation over extended duty cycles
• Integrated LCD display with high-brightness LED backlight—enables clear parameter visibility from >2 meters, even under ambient lab lighting
• Large ergonomic rotary speed control knob—designed for precise tactile adjustment while wearing standard laboratory gloves
• Self-locking, high-concentricity chuck with 0.5–10 mm clamping range—minimizes runout and ensures mechanical stability at both low (20 rpm) and high-speed operation
• Low-speed soft-start function—reduces mechanical shock during initiation, protecting sensitive samples and vessel integrity
• Full bidirectional rotation capability—supports specialized mixing protocols requiring alternating shear direction, such as polymer dissolution or heterogeneous catalyst suspension
• Corrosion-resistant housing with chemically inert surface treatment—rated for sustained exposure to common solvents, acids, and bases encountered in synthetic chemistry labs

Sample Compatibility & Compliance

The WB2000-C accommodates a broad spectrum of sample types—from low-viscosity aqueous solutions to highly viscous non-Newtonian fluids (≤20,000 cP). Its torque output (≤70 N·cm) and dynamic speed response ensure reliable dispersion of particulates, emulsification of immiscible phases, and homogenization of suspensions without cavitation or vortex instability. The unit complies with IEC 61010-1:2010 safety standards for electrical equipment used in laboratory environments. Its RS-232 interface and analog I/O ports support integration into validated instrument networks compliant with FDA 21 CFR Part 11 requirements when paired with appropriate audit-trail-capable software. All mechanical components meet RoHS Directive 2011/65/EU material restrictions.

Software & Data Management

The WB2000-C supports external PC-based control via its native RS-232 serial interface, enabling remote parameter setting, real-time speed monitoring, and automated sequence execution using WIGGENS’ proprietary LabControl Suite (Windows-compatible). Analog inputs (0–20 mA / 0–10 V) allow synchronization with external process controllers—for example, linking stir speed to temperature ramp profiles in jacketed reactor systems. Analog output (0–5 V) provides proportional speed feedback for data logging systems. Optional foot switch integration permits hands-free start/stop functionality during multi-step procedures. All communication channels retain timestamped command history, supporting traceability for QA/QC reporting and internal audit readiness.

Applications

• Controlled agitation in glass or stainless-steel reactors during exothermic synthesis and crystallization studies
• Homogenization of cell culture media, vaccine adjuvants, and nanoparticle dispersions in biopharma R&D
• Accelerated aging tests requiring reproducible shear stress application per ASTM D7042
• Preparation of calibration standards for viscometry and rheometry validation
• Continuous blending operations in analytical sample preparation workflows (e.g., EPA Method 525.3)
• Integration into automated reaction platforms where synchronized stirring is required alongside pH, temperature, or gas dosing modules

FAQ

Does the WB2000-C support GMP-compliant electronic record keeping?
Yes—when used with validated third-party SCADA or LIMS software that implements 21 CFR Part 11-compliant user authentication, audit trails, and electronic signatures, the WB2000-C’s digital interfaces satisfy core data integrity requirements.
Can the stirrer be mounted directly onto a fume hood shelf?
It is designed for rigid mounting on standard lab iron frames or custom brackets; direct fume hood installation is possible only if structural load capacity exceeds 3.5 kg and vibration isolation measures are implemented.
Is calibration documentation provided with the unit?
A factory-issued performance verification report—including speed accuracy verification at three points (100 rpm, 1000 rpm, 2000 rpm) and torque linearity assessment—is supplied with each shipment.
What stainless steel grades are used in the included four-blade impeller?
The standard impeller is manufactured from AISI 316 stainless steel, offering superior resistance to chloride-induced pitting and crevice corrosion compared to 304-grade alternatives.
How is firmware updated on the WB2000-C?
Firmware upgrades are performed exclusively via RS-232 using WIGGENS-certified utility software; no field-upgradable flash memory is accessible to end users to preserve regulatory compliance integrity.