SUNNY HENGPING DCY Series LCD Display Low-Temperature Constant Temperature Bath

Overview

The SUNNY HENGPING DCY Series LCD Display Low-Temperature Constant Temperature Bath is an engineered thermal management system designed for precise, stable temperature control in laboratory and analytical applications. Based on the proven DC platform and enhanced with modern microprocessor-based temperature regulation, this bath employs a dual-mode thermoelectric refrigeration and resistive heating architecture to achieve continuous operation across a wide thermal range—from sub-zero cooling at −5 °C up to 95 °C. Its core function relies on closed-loop PID control of both refrigerant expansion and heater duty cycle, ensuring minimal thermal overshoot and high reproducibility under dynamic load conditions. The unit is intended for immersion-based thermal conditioning of external equipment—including spectrophotometer cells, viscometer jackets, calorimeter blocks, and reaction vessels—as well as direct sample stabilization in low-volume aqueous or oil-based media. Unlike open-bath heaters, the DCY series integrates sealed circulation pathways and stainless-steel construction to support long-term corrosion resistance and compatibility with diverse heat-transfer fluids.

Key Features

• LCD display with intuitive menu navigation and real-time visualization of setpoint, actual temperature, pump status, and alarm indicators
• Microcomputer-controlled PID algorithm delivering ±0.05 °C temperature stability over time—validated per ASTM E2251-22 guidelines for thermal uniformity assessment
• Internal and external circulation modes enabled via a high-efficiency magnetic-drive circulation pump; flow rates configurable up to 10 L/min depending on tank volume and fluid viscosity
• Stainless steel inner tank (AISI 304) and reinforced outer housing ensure chemical resistance, structural rigidity, and compliance with ISO 13485 cleanroom-compatible fabrication standards
• Integrated liquid level sensor with audible and visual alarm output prevents dry-run damage and supports GLP-compliant operational logging
• Optional bidirectional communication interface (RS232/RS485) enables remote parameter setting, real-time data streaming, and integration into centralized lab automation systems compliant with IEEE 11073-10201

Sample Compatibility & Compliance

The DCY series accommodates standard laboratory glassware (e.g., U-tube viscometers, jacketed cuvettes, and small-scale bioreactors) with immersion depths up to 200 mm. Its temperature range and stability meet requirements for USP environmental simulation, ISO 17025-accredited calibration labs, and routine QC testing in pharmaceutical, polymer, and food science environments. All units undergo factory verification against traceable NIST-calibrated reference thermometers and are supplied with a Certificate of Conformance indicating adherence to GB/T 26807–2011 (Chinese national standard for constant-temperature baths) and general IEC 61010-1 safety requirements for electrical laboratory equipment.

Software & Data Management

While the DCY operates autonomously via front-panel controls, optional software packages support configuration archiving, time-stamped temperature logging, and export to CSV or Excel formats. When connected via serial interface, the device transmits timestamped temperature readings at user-defined intervals (1 s to 60 min), supporting audit trails required under FDA 21 CFR Part 11 for electronic records in regulated laboratories. Data integrity is preserved through non-volatile memory retention during power interruption, and firmware updates are performed via secure bootloader protocol without requiring hardware disassembly.

Applications

• Thermal equilibration of optical components in UV-Vis and FTIR spectroscopy
• Temperature-dependent viscosity measurements using rotational or capillary viscometers
• Calibration of platinum resistance thermometers (PRTs) and thermocouples across defined sub-zero and elevated ranges
• Stabilization of enzymatic reaction mixtures in biochemistry assays
• Controlled cooling/heating cycles in material phase-transition studies (e.g., polymer crystallinity, lipid bilayer transitions)
• Supporting ASTM D2857 (infrared absorbance), ASTM D445 (kinematic viscosity), and ISO 3104 (petroleum products) test protocols

FAQ

What is the maximum allowable working temperature for the DCY-0504 model?

The DCY-0504 maintains stable operation up to 95 °C, with continuous duty cycle limited by ambient temperature and ventilation clearance per IEC 60068-2-14.
Can the bath be used with silicone oil or ethylene glycol solutions?

Yes—provided fluid viscosity remains below 500 cSt at operating temperature and pH stays within 5–9 to preserve stainless-steel integrity.
Is the temperature stability specification valid at full load and maximum flow rate?

Stability of ±0.05 °C is verified under static conditions with water medium; dynamic stability degrades to ±0.1 °C when pumping at rated flow with external heat exchangers.
Does the unit include validation documentation for GMP environments?

A Factory Acceptance Test (FAT) report is included; IQ/OQ documentation templates are available upon request for site-specific qualification under Annex 15 and EU GMP guidelines.
How often does the refrigerant require servicing?

The sealed R134a refrigeration circuit is maintenance-free for ≥5 years under normal use; periodic condenser coil cleaning is recommended every 6 months in dusty environments.