YDWG WG-DC0506 Low-Temperature Constant-Temperature Bath

Overview

The YDWG WG-DC0506 Low-Temperature Constant-Temperature Bath is a precision-engineered thermal management system designed for laboratory environments requiring stable, programmable temperature control across a broad operational range—from sub-zero cooling to near-boiling heating. Built on a dual-mode thermoregulation architecture, the unit integrates a high-efficiency hermetic compressor for active refrigeration and a calibrated resistive heating element for precise thermal elevation. Its core operating principle relies on closed-loop feedback control via an imported Pt100 platinum resistance thermometer, delivering real-time thermal sensing with traceable accuracy. The microprocessor-based PID controller features auto-tuning capability, enabling rapid convergence to setpoint with minimal overshoot and sustained stability of ±0.05 °C at 25 °C—verified under standard conditions using water or ethanol as heat-transfer media. With a 6-liter stainless-steel bath reservoir and dual internal/external circulation, the WG-DC0506 serves both direct immersion applications and remote thermal conditioning of auxiliary instruments such as refractometers, viscometers, spectrophotometers, and condenser jackets.

Key Features

• Compressor-assisted refrigeration enables reliable operation down to −5.00 °C without cryogenic fluids or dry ice dependency.
• Dual circulation mode supports simultaneous internal bath homogenization and external flow-through cooling of connected equipment (e.g., Abbe refractometers SGW-732, WYA-3S, WYA-2S).
• Pt100 sensor mounted directly in the bath fluid ensures high-fidelity temperature measurement traceable to ITS-90 standards.
• Intelligent safety monitoring includes over-temperature shutdown, sensor open-circuit/short-circuit detection, and real-time fault logging.
• Ergonomic design features a front-mounted drain valve for efficient bath cleaning and medium replacement; optional auto-refill module maintains uninterrupted operation during long-duration protocols.
• Energy-efficient recirculating coolant loop reduces tap-water consumption—particularly advantageous in warm ambient conditions where continuous fresh-water cooling would otherwise be required.

Sample Compatibility & Compliance

The WG-DC0506 accommodates a wide range of heat-transfer media, including deionized water, ethanol, methanol, and low-viscosity silicone oils—enabling compatibility with diverse sample types and experimental constraints. Its stainless-steel inner tank (304 grade) resists corrosion from common organic solvents and aqueous buffers. While not certified to ISO/IEC 17025 or ASTM E2777 as a standalone metrology device, the system’s thermal performance aligns with routine QC/QA requirements in pharmaceutical, chemical, and materials laboratories. When integrated into validated workflows—such as USP environmental control or GLP-compliant refractive index measurements—the unit supports audit-ready documentation when paired with optional USB data logging and timestamped curve export.

Software & Data Management

The built-in LCD interface provides intuitive local control with 0.01 °C display resolution and full parameter configuration (setpoint, ramp rate, hold time, pump speed). For extended data integrity, optional communication modules enable connection to external PCs via USB or RS-485 interfaces. Temperature vs. time profiles can be exported in CSV format to USB flash drives for post-processing in Excel, MATLAB, or LIMS platforms. All logged data include embedded timestamps and instrument ID metadata—supporting basic 21 CFR Part 11 readiness when deployed with controlled user access and electronic signature protocols at the host system level.

Applications

• Thermal stabilization of Abbe refractometers (e.g., SGW-732, WYA-3S) during precision refractive index determination per ASTM D1218 or ISO 17025 Annex A.
• Cooling jacket supply for rotary evaporators, distillation columns, and condensers in synthetic chemistry labs.
• Calibration verification of digital thermometers and RTD probes against NIST-traceable reference baths.
• Controlled-temperature sample conditioning prior to rheological, spectroscopic, or chromatographic analysis.
• Long-term stability testing of temperature-sensitive reagents, polymers, and biological standards.

FAQ

What is the minimum operating temperature, and does it require special coolant?
The WG-DC0506 achieves −5.00 °C using standard R134a refrigerant; no external coolant or antifreeze additives are required for operation within its specified range.
Can the unit maintain stability at elevated temperatures near 100 °C?
Yes—it delivers ±0.05 °C stability at 25 °C, and while absolute stability widens slightly near extremes, it remains within ±0.1 °C across the full 99.99 °C upper limit under load.
Is the external circulation port compatible with standard tubing sizes?
The outlet/inlet fittings accept 10 mm (3/8″) OD flexible tubing—compatible with most laboratory-grade silicone or fluoropolymer hoses.
Does the system support remote monitoring via Ethernet or Wi-Fi?
No native Ethernet or Wi-Fi interface is included; connectivity is limited to USB and RS-485 ports. Third-party serial-to-Ethernet converters may be used with custom software integration.
What maintenance intervals are recommended for the compressor and circulation pump?
Annual inspection of refrigerant pressure, pump seal integrity, and bath cleanliness is advised. No scheduled oil changes are required for the sealed compressor; pump bearings are lifetime-lubricated.