WIGGENS WH280-R High-Temperature Magnetic Stirrer with Integrated Heating and PID Temperature Control

Overview

The WIGGENS WH280-R is a high-precision, high-temperature magnetic stirrer engineered for demanding laboratory applications requiring simultaneous precise heating and robust mechanical mixing. Unlike basic hotplates or standalone stirrers, the WH280-R integrates infrared-enhanced heating elements with a digitally controlled magnetic drive system—enabling stable thermal management and reproducible agitation across a wide operational envelope. Its core measurement and control architecture relies on closed-loop PID temperature regulation, supported by dual external sensing capability: a calibrated Pt100 resistance thermometer for accurate sample temperature feedback and an independent thermocouple for auxiliary safety monitoring. This dual-sensor architecture ensures compliance with GLP-aligned experimental traceability requirements, particularly in regulated environments where temperature deviation logging and over-temperature event recording are mandatory per internal SOPs or ISO/IEC 17025 guidelines.

Key Features

• Enamel-coated glass heating plate (Ø135 mm) offering chemical resistance, uniform heat distribution, and easy cleaning—ideal for acidic, alkaline, or organic solvent exposure.
• Intelligent ICC (Intelligent Current Control) stirring motor delivering consistent torque from 100 to 1500 rpm, with selectable clockwise or counterclockwise rotation for optimized suspension homogeneity or viscous media deaeration.
• High-resolution color touchscreen interface with rotary encoder knob—supporting intuitive parameter entry for temperature setpoint, speed, timer duration, and safety thresholds without menu nesting.
• Auto-recall function stores the last active configuration (temperature, speed, timer, protection offsets), reducing setup time for routine protocols and minimizing operator-induced variability.
• Integrated anti-spill liquid channel above the control panel—designed to contain accidental drips or condensate, preventing ingress into electronics and extending service life under humid or multi-step wet-lab conditions.
• Dual-stage thermal protection: primary cutoff via internal bimetallic switch at user-defined excess (50–500 °C), plus programmable solution over-temperature offset (10–50 °C above setpoint) to prevent thermal degradation of sensitive samples.
• RS-232 and RS-485 serial interfaces enable bidirectional communication with LIMS or SCADA systems—supporting remote parameter upload/download, real-time data streaming, and audit-trail generation compliant with FDA 21 CFR Part 11 when paired with validated software.

Sample Compatibility & Compliance

The WH280-R accommodates aqueous and non-aqueous media up to 20 L (water-equivalent volume), with verified thermal stability of ±1 °C when operated with a calibrated Pt100 sensor immersed directly in the sample vessel. Its enamel-glass surface resists corrosion from common reagents including HCl (≤6 M), NaOH (≤2 M), ethanol, acetone, and DMF—making it suitable for synthesis, dissolution testing (per USP ), and buffer preparation workflows. The unit meets IEC 61010-1:2010 safety standards for laboratory electrical equipment and carries CE marking for EMC and low-voltage directive compliance. Optional calibration certificates (traceable to DKD/DAkkS standards) are available for users operating under ISO/IEC 17025-accredited quality systems.

Software & Data Management

While the WH280-R operates autonomously via its embedded firmware, its RS-232/RS-485 ports support integration with third-party laboratory automation platforms—including LabVIEW, MATLAB, or custom Python-based control scripts using Modbus RTU protocol. Logged parameters (actual temperature, setpoint, RPM, elapsed time, fault codes) can be timestamped and exported as CSV files for post-run analysis. When deployed in GxP-regulated settings, the device supports electronic signature-enabled configuration locking and change history tracking when interfaced with validated middleware that enforces 21 CFR Part 11 audit trails, including user authentication, action timestamps, and immutable record retention.

Applications

• Controlled-temperature synthesis reactions (e.g., esterification, condensation, nanoparticle precipitation) requiring sustained heating above 300 °C with homogeneous mixing.
• Dissolution testing of pharmaceutical dosage forms per USP apparatus II, where precise bath temperature maintenance (±0.2 °C) and paddle stability are critical.
• Preparation of high-viscosity polymer solutions, catalyst slurries, or colloidal dispersions where variable-speed agitation prevents sedimentation without shear-induced degradation.
• Calibration of reference thermometers and validation of thermal profiles in jacketed reactors or incubators.
• Long-duration stability studies involving accelerated aging protocols at elevated temperatures (e.g., 40–450 °C) with uninterrupted agitation cycles exceeding 24 hours.

FAQ

Does the WH280-R support external temperature feedback for closed-loop control?
Yes—it accepts input from a standard Pt100 sensor (supplied) for direct sample temperature regulation, enabling true process-relevant thermal control rather than plate-surface approximation.
Can the unit operate continuously for extended periods?
Yes—the WH280-R is rated for continuous duty cycling; its sealed enclosure, thermally isolated electronics, and redundant thermal cutoffs ensure safe unattended operation up to 99 hours 59 minutes or indefinitely in continuous mode.
Is the enamel-glass plate resistant to thermal shock?
The plate is designed for rapid heating and cooling within its specified range (0–450 °C); however, direct contact with sub-zero cryogenic vessels or sudden immersion in cold liquids is not recommended and may compromise coating integrity.
What safety certifications does the WH280-R carry?
It complies with IEC 61010-1:2010 (Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use) and bears CE marking for conformity with EU electromagnetic compatibility (2014/30/EU) and low-voltage (2014/35/EU) directives.
How is calibration verification performed?
Users may perform in-house verification using NIST-traceable reference thermometers and tachometers; WIGGENS also offers factory calibration services with DKD/DAkkS-certified documentation upon request.