WIGGENS WH200D-1K Digital Heating Plate

Overview

The WIGGENS WH200D-1K Digital Heating Plate is an engineered thermal platform designed for precise, repeatable, and safe conductive heating in analytical, synthetic, and quality control laboratories. It operates on resistive heating principles, delivering uniform thermal energy across its ceramic-coated aluminum plate surface via PID-controlled solid-state power regulation. Unlike open-loop heaters, the WH200D-1K integrates real-time feedback—either from its built-in sensor or an externally connected Pt100 probe—to maintain setpoint stability under variable load conditions (e.g., changing vessel mass, solvent volatility, or ambient drafts). Its operational envelope spans 50 °C to 300 °C, with a typical plate uniformity of ±1 °C at steady state (measured per ISO 17025-aligned validation protocols using calibrated reference thermometers). The device complies with IEC 61010-1:2010 for electrical safety in laboratory equipment and meets EN 60529 IP20 ingress protection requirements.

Key Features

• PID temperature control algorithm ensures high reproducibility and minimal overshoot during ramp-and-soak cycles, critical for applications such as solvent reflux, enzymatic incubation, or polymerization pre-heating.
• Dual-display LED interface simultaneously shows set temperature and real-time plate temperature—enabling immediate visual verification without menu navigation.
• Three-stage timer logic: OFF (manual stop), OFF-Time (auto-shutdown after elapsed time), and WAIT-Time (delayed start), programmable from 1 minute to 9959 minutes (166 hours).
• Integrated safety architecture includes over-temperature cutoff (>320 °C internal limit), visual status indicator (LED activation above 60 °C), and audible/visual alarm for high/low limit deviation.
• Front-panel reset function restores factory calibration parameters—essential for audit readiness in GLP and GMP environments where instrument configuration traceability is mandated.
• Standard Pt100 input port supports external temperature monitoring and closed-loop control of sample fluid temperature, decoupling system performance from vessel geometry or thermal mass effects.

Sample Compatibility & Compliance

The WH200D-1K accommodates standard laboratory glassware (Erlenmeyer flasks, round-bottom flasks, beakers) up to 1 L volume when used with appropriate support stands. Its 170 × 170 mm heating surface provides optimal contact area for flat-bottom containers; compatibility with curved-bottom vessels requires use of heat-conductive sand baths or custom aluminum blocks. The ceramic coating resists corrosion from common solvents (e.g., acetone, ethanol, dilute acids/bases) and withstands repeated thermal cycling between ambient and 300 °C without delamination. Device firmware and hardware design conform to EU RoHS Directive 2011/65/EU and CE marking requirements. For regulated workflows, the unit supports documentation of calibration events and parameter changes—aligning with FDA 21 CFR Part 11 expectations when paired with compliant data logging software.

Software & Data Management

While the WH200D-1K operates as a standalone instrument, its RS232/RS485 interface (available on higher-tier WH200D-2K/3K variants) enables integration into centralized lab automation systems. When interfaced via optional communication modules, users can log temperature profiles, timer events, and alarm triggers directly into LIMS or ELN platforms. Internal non-volatile memory retains last-used settings—including PID tuning values and timer configurations—across power cycles. Audit trails generated through external logging satisfy ISO/IEC 17025 clause 7.7 (equipment records) and USP <1058> analytical instrument qualification guidelines.

Applications

• Controlled evaporation of solvents during sample concentration prior to GC or HPLC analysis.
• Pre-heating reagents and reaction mixtures in organic synthesis workflows requiring stable thermal input.
• Accelerated aging studies of pharmaceutical excipients under defined thermal stress (ICH Q1A).
• Calibration of liquid-in-glass thermometers and digital probes using fixed-point reference fluids (e.g., water at 100 °C, paraffin oil at 150 °C).
• Supporting ASTM D92 (Cleveland Open Cup Flash Point) and ASTM D93 (Pensky-Martens Closed Cup) test methods where precise hot-plate temperature ramping is required.

FAQ

Can the WH200D-1K control the temperature of the sample solution directly?

Yes—when connected to an external Pt100 sensor immersed in the sample, the unit switches to sample-temperature control mode, maintaining setpoint accuracy within ±1 °C across the 40–300 °C range.
Is the heating plate compatible with magnetic stirrers?

No—the WH200D-1K does not integrate stirring functionality. For combined heating/stirring, WIGGENS offers the WH200D-ST series with embedded stirrer motors and ICC (Intelligent Control Circuit) synchronization.
What is the maximum recommended operating time at 300 °C?

Continuous operation at maximum temperature is validated for ≥24 hours under load; however, long-term exposure above 250 °C may accelerate surface oxidation—routine calibration checks are advised per ISO/IEC 17025 Section 6.4.
Does the device support NIST-traceable calibration?

Yes—calibration certificates issued by accredited third-party labs (e.g., DAkkS or UKAS) are available upon request, covering both sensor linearity and temporal stability per ISO/IEC 17025 Annex A.3.
How is firmware updated?

Firmware updates are performed exclusively via authorized service centers using proprietary diagnostic tools; end-user update capability is disabled to preserve regulatory compliance integrity.