WIGGENS WH200/WH210/WH240PLUS/WH420/WH620 Heating Magnetic Stirrer

Overview

The WIGGENS WH-Series Heating Magnetic Stirrers (WH200, WH210, WH240PLUS, WH420, WH620) are precision-engineered laboratory instruments designed for simultaneous heating and magnetic agitation of liquid samples in glass or stainless-steel vessels. Based on the principle of rotating magnetic field coupling—where a motor-driven permanent magnet beneath the ceramic or aluminum heating plate induces rotation in a PTFE- or glass-coated stir bar—the system delivers consistent torque transfer without mechanical shaft penetration. These units comply with IEC 61010-1 safety standards for electrical equipment used in laboratory environments, incorporating thermal cut-off circuits, sealed electronics enclosures, and surface temperature monitoring to prevent uncontrolled thermal escalation. The WH-Series is optimized for applications requiring reproducible thermal profiles and stable rotational dynamics—including buffer preparation, solubility studies, dissolution testing, and reagent synthesis under controlled thermal conditions.

Key Features

• Microprocessor-based PID temperature and speed control ensures high reproducibility across repeated experimental runs.
• High-brightness LED display enables real-time, dual-parameter monitoring (temperature in °C and stirring speed in rpm) with intuitive keypad adjustment.
• Auto-memory function retains the last-used setpoints for both temperature and speed, eliminating manual reconfiguration between sequential experiments.
• Integrated spill containment groove above the control panel directs accidental liquid runoff away from internal circuitry—critical for long-term reliability in humid or corrosive lab settings.
• Hermetically sealed housing isolates sensitive electronic components from ambient dust, vapors, and condensation, supporting operation in ISO Class 7 cleanrooms or GLP-compliant analytical laboratories.
• Dynamic overtemperature protection triggers visual alert (flashing “HOT” indicator) when plate surface exceeds 50 °C; an E02 error code activates if either the heating plate temperature or medium temperature deviates by >50 °C from its setpoint—ensuring compliance with risk-mitigation protocols defined in ISO/IEC 17025 Clause 6.4.

Sample Compatibility & Compliance

These stirrers accommodate standard round-bottom flasks (50 mL–20 L), beakers, and jacketed reactors equipped with compatible magnetic stir bars (diameters 8–25 mm, lengths 20–80 mm). The WH240PLUS and WH620 models support larger-volume applications with enhanced thermal uniformity across plates up to 180 mm × 180 mm. All units meet CE marking requirements and conform to EN 61326-1 (EMC for laboratory equipment) and EN 61000-6-3 (emission limits). Their design supports audit readiness for FDA 21 CFR Part 11–governed environments when paired with validated SOPs—particularly where temperature traceability and parameter change logging are required for quality control documentation.

Software & Data Management

While standalone operation requires no software, select WH-Series models (WH420 and WH620) offer optional RS-232 or USB interfaces for integration into centralized lab management systems. When connected, they support ASCII-based command protocols for remote parameter setting, real-time data streaming (temperature and rpm at 1 Hz resolution), and event-triggered logging of alarms (e.g., E02 activation timestamp, duration, and recovery status). Data export formats include CSV and TXT, enabling direct import into LIMS platforms compliant with ISO/IEC 17025 Annex A.3 requirements for measurement uncertainty documentation and instrument calibration history tracking.

Applications

• Preparation of homogeneous aqueous and organic solutions for HPLC mobile phase formulation and titrant standardization.
• Controlled-temperature dissolution testing per USP and Ph. Eur. 2.9.3 guidelines.
• Catalytic reaction monitoring in synthetic chemistry workflows requiring precise thermal ramping (e.g., Suzuki coupling, esterification).
• Cell culture media conditioning prior to sterilization—maintaining pH stability during prolonged heating/stirring cycles.
• Calibration of thermometers and RTDs using stirred oil baths per ASTM E77 and ISO 17025 Clause 6.5.2.

FAQ

What safety certifications do WH-Series stirrers hold?

All models carry CE marking and comply with IEC 61010-1:2010, EN 61326-1:2013, and RoHS 2011/65/EU directives.
Can the WH620 be used with conductive or viscous media?

Yes—the WH620 features enhanced torque output (up to 60 N·cm) and adaptive speed regulation, suitable for glycerol, ethylene glycol, and polymer solutions up to 10,000 mPa·s viscosity.
Is calibration documentation available for audit purposes?

Factory calibration certificates (traceable to PTB/NIST standards) are provided upon request and include as-found/as-left data for temperature (±0.5 °C at 100 °C) and speed (±2 rpm at 500 rpm).
How does the E02 alarm differ from the HOT indicator?

The HOT indicator signals surface temperature ≥50 °C as a precaution; E02 is a fault condition indicating thermal deviation >50 °C from setpoint—requiring manual reset after cooling.
Are replacement stir bars and plates available through WIGGENS authorized channels?

Yes—certified PTFE-coated stir bars (with PTFE/glass composite options) and interchangeable ceramic/aluminum heating plates are stocked globally via WIGGENS distribution partners.