WIGGENS WH200D-2K Digital Heating Plate

Overview

The WIGGENS WH200D-2K Digital Heating Plate is an engineered solution for precise, repeatable, and safe conductive heating in analytical, quality control, and synthetic laboratories. Designed around a robust aluminum heating plate with a durable ceramic coating, it delivers uniform thermal distribution across its 320 × 320 mm surface—critical for consistent reaction kinetics, solvent evaporation, sample digestion, and reagent preparation. Unlike open-coil or infrared-based systems, this unit relies on direct conduction through solid-phase contact between the heated surface and laboratory vessels (e.g., beakers, flasks, crystallization dishes), minimizing radiative loss and enabling stable thermal setpoints under variable ambient conditions. Its integrated PID temperature controller ensures high reproducibility by continuously adjusting power output to compensate for load changes, ambient drift, and thermal inertia—particularly essential when maintaining narrow tolerances over extended durations (e.g., reflux, aging studies, or ASTM D92 flash point preheating protocols).

Key Features

• PID-controlled digital temperature regulation with real-time LED display of both setpoint and actual surface temperature
• Three operational timer modes: OFF (manual termination), OFF-Time (auto-shutdown after elapsed time), and WAIT-Time (delayed start)
• Programmable timing range from 1 minute to 9959 minutes (166 hours), supporting unattended overnight or multi-day heating cycles
• Dual-stage safety system: visual status indicator activates automatically above 60 °C; independent high/low temperature limit alarm prevents thermal runaway
• Factory reset function restores default calibration and configuration parameters—essential for GLP-compliant instrument maintenance logs
• Support for external Pt100 sensor input enables closed-loop control of sample temperature rather than plate surface temperature, improving accuracy in applications where vessel geometry or liquid thermal mass introduces lag
• Ergonomic front-panel layout with tactile buttons and logical menu navigation reduces operator error during routine use

Sample Compatibility & Compliance

The WH200D-2K accommodates standard borosilicate glassware (e.g., 1000 mL round-bottom flasks, 2 L beakers) and stainless-steel containers up to 400 mm in diameter. Its ceramic-coated aluminum plate resists corrosion from common solvents (e.g., acetone, ethanol, dilute acids/bases) and withstands repeated thermal cycling without degradation. The device complies with IEC 61010-1:2010 for electrical safety in laboratory equipment and meets EMC requirements per EN 61326-1. While not intrinsically rated for hazardous environments, its overtemperature cutoff and sealed electronics architecture align with general-purpose GMP and ISO/IEC 17025 laboratory infrastructure expectations. Documentation supports traceable calibration using NIST-traceable Pt100 reference probes.

Software & Data Management

This model operates as a standalone benchtop instrument without proprietary software dependencies. All configuration and monitoring occur via the front-panel interface. However, the optional RS232/RS485 communication port (available on select variants within the WH200D series) permits integration into centralized lab automation frameworks for remote status polling, event logging, or audit trail generation—supporting 21 CFR Part 11 compliance when paired with validated SCADA or LIMS platforms. Temperature stability data (±1 °C at 250 °C with external Pt100 feedback) and ramp profiles (e.g., 50–150 °C in silicone oil) are routinely documented during IQ/OQ validation per USP guidelines.

Applications

• Controlled heating of reaction mixtures prior to GC/HPLC injection preparation
• Constant-temperature drying of filter papers, precipitates, or chromatographic media
• Preheating of viscosity standards (e.g., Cannon-Fenske capillaries per ASTM D445)
• Standardized solvent removal in environmental EPA Method 503.1 extractions
• Thermal conditioning of polymer samples prior to tensile testing (ASTM D638)
• Heating baths for enzymatic assays requiring stable 37 °C or 60 °C incubation

FAQ

Can the WH200D-2K maintain temperature stability when heating viscous or low-thermal-conductivity media?

Yes—when used with an externally connected Pt100 sensor immersed in the sample, the system achieves ±1 °C stability at 250 °C, regardless of medium viscosity or container wall thickness.
Is calibration traceable to national standards?

Calibration is supported via external Pt100 probes certified to ISO/IEC 17025-accredited laboratories; factory documentation includes as-found/as-left records for audit readiness.
Does the unit support continuous operation at maximum temperature?

It is rated for indefinite operation at 300 °C surface temperature under proper ventilation and load conditions, per manufacturer thermal derating specifications.
What maintenance is required to ensure long-term accuracy?

Annual verification of sensor input linearity and PID response curve is recommended; no internal consumables or recalibration firmware updates are required.
How does the WAIT-Time mode differ from OFF-Time in practice?

WAIT-Time initiates heating only after a user-defined delay (e.g., start at 8:00 AM following a 2-hour hold), whereas OFF-Time terminates heating after a preset duration (e.g., shut down after 4 hours).