WIGGENS WH-410D Digital Multi-Position Magnetic Stirrer

Overview

The WIGGENS WH-410D is a microprocessor-controlled, four-position digital magnetic stirrer engineered for precision, stability, and reproducibility in routine laboratory workflows. Designed around closed-loop speed regulation, it continuously monitors torque load via real-time viscosity feedback and dynamically adjusts motor output to maintain set rotational speed—critical when handling non-Newtonian fluids, viscous solutions, or temperature-dependent media. Unlike open-loop analog stirrers, the WH-410D employs a brushless DC motor coupled with intelligent power management, ensuring consistent torque delivery across the full 100–1500 rpm range without speed droop—even at high viscosity or low ambient temperatures. Its robust powder-coated stainless steel platform provides chemical resistance against common solvents, acids, and bases, while its compact footprint (344 × 377 × 48 mm) optimizes bench space in QC labs, teaching facilities, and R&D environments.

Key Features

• Four independent stirring positions with fully isolated speed control—each channel operates at user-defined rpm without cross-interference.
• LED display showing both setpoint and real-time actual speed for immediate verification and process traceability.
• Viscosity-adaptive control algorithm ensures ±3% speed stability under variable load conditions, meeting requirements for method reproducibility in GLP-compliant workflows.
• Brushless DC motor delivers quiet operation (<45 dB(A)), extended service life, and minimal heat generation—ideal for long-duration incubation or temperature-sensitive reactions.
• Chemically resistant work surface with optional PTFE protective mat (part no. 400215-PTFE), rated for continuous use from –70 °C to +260 °C and exhibiting >25 N/100 mm adhesive strength for secure placement on glass or metal benches.
• Compliant with IEC 61010-1 for electrical safety in laboratory equipment, CE-marked, and RoHS-conformant—supporting procurement alignment with EU regulatory frameworks.

Sample Compatibility & Compliance

The WH-410D accommodates standard laboratory vessels including beakers (50–2000 mL), Erlenmeyer flasks, and reaction vials equipped with PTFE-coated magnetic stir bars. It supports aqueous, organic, and mildly corrosive media—validated for compatibility with 1 M HCl, 1 M NaOH, acetone, ethanol, and 30% H₂O₂ under standard operating conditions. While not rated for explosion-proof or intrinsically safe applications, its design meets general-purpose safety standards for non-hazardous lab environments. For regulated quality control settings, the device’s stable speed performance aligns with ASTM D1298 (density of crude oil) and USP (dissolution apparatus qualification) auxiliary mixing requirements.

Software & Data Management

The WH-410D operates as a standalone instrument with no embedded software or network interface. All operational parameters are configured locally via rotary encoder and displayed in real time. Though it does not generate electronic records or support FDA 21 CFR Part 11 compliance natively, its deterministic behavior—combined with external logging via video documentation or manual entry into LIMS—enables audit-ready usage in GMP-aligned laboratories. The consistent speed repeatability (CV <1.5% over 24 h) facilitates integration into validated SOPs where mechanical mixing consistency is a critical process parameter.

Applications

• Routine sample homogenization prior to pH measurement, titration, or spectrophotometric analysis.
• Preparation of calibration standards and reference solutions requiring uniform dispersion of solids or immiscible phases.
• Supporting dissolution testing protocols in pharmaceutical QC labs where agitation consistency directly impacts release profile accuracy.
• Teaching laboratories for demonstrating kinetics, solubility equilibria, or redox reactions under controlled mixing conditions.
• Cell culture media preparation and buffer equilibration where gentle yet reliable agitation prevents foaming or shear-induced denaturation.

FAQ

Can the WH-410D be used with hot plates?
No—the WH-410D is a magnetic stirrer only and does not incorporate heating functionality. For combined heating/stirring, consider the WIGGENS WH-410HT series.
Is speed calibration traceable to national standards?
The unit is factory-calibrated using NIST-traceable tachometric reference; calibration certificates are available upon request (additional charge).
What stir bar sizes are recommended for optimal performance at 2000 mL volume?
For volumes up to 2000 mL, use PTFE-coated stir bars ≥60 mm in length with elliptical or cross-shaped geometry to ensure vortex stability and bottom-layer engagement.
Does the PTFE mat affect thermal conductivity during ambient-temperature mixing?
No—thermal transfer is negligible under non-heated operation; the mat serves exclusively as a chemical barrier and anti-slip interface.
How often should maintenance be performed?
No scheduled maintenance is required. Clean the work surface regularly with isopropanol; inspect stir bars for coating integrity before each use.