SUNNY HENGPING DCC Series Touchscreen Low-Temperature Circulating Bath

Overview

The SUNNY HENGPING DCC Series Touchscreen Low-Temperature Circulating Bath is an engineered solution for precise, stable, and programmable temperature control in analytical, pharmaceutical, and materials testing laboratories. Designed around a compact micro-channel condenser architecture, the DCC series achieves high thermal efficiency within a footprint of just 270 mm wide—optimized for space-constrained benchtop environments without compromising performance. It operates on the principle of forced liquid circulation combined with dual-mode (refrigeration + heating) thermoregulation, enabling accurate setpoint maintenance across a broad operational range from −40 °C to +95 °C, depending on model configuration. The system integrates a high-stability PID controller, calibrated Pt100 sensing per IEC 60751 Class A tolerances, and a hermetically sealed compressor—ensuring long-term reliability, minimal thermal drift, and consistent repeatability in critical applications such as viscometry calibration, spectrophotometer cell temperature control, or reaction calorimetry support.

Key Features

• 4.3-inch capacitive TFT touchscreen interface with intuitive navigation, real-time graphical trend display, and multi-segment ramp-soak programming capability
• Micro-channel condenser design reduces overall unit width to 270 mm while maintaining full refrigeration capacity—ideal for crowded lab benches or integrated instrument racks
• PID temperature control with selectable display resolution (±0.01 °C or ±0.1 °C), delivering ±0.05 °C stability at setpoint under standard ambient conditions
• German Heraeus PT100 sensor (IEC 60751 Class A) embedded directly in the bath fluid path for rapid response and traceable accuracy
• Hermetically sealed compressor refrigeration system with R404A or R507 refrigerant (model-dependent), supporting continuous operation down to −40 °C
• Bi-directional circulation pump (≥8 L/min flow rate) with switchable internal/external loop mode—enabling both bath-only stabilization and external jacketed vessel cooling/heating
• Integrated low-level detection circuitry with audible/visual alarm to prevent heater activation during insufficient fluid volume—mitigating dry-run risk and extending heater life
• Ergonomic service design: side-mounted drain valve for efficient bath fluid exchange; removable front ventilation panel with concealed latches; tool-free access to reservoir and pump housing

Sample Compatibility & Compliance

The DCC series accommodates a wide range of heat-transfer media—including deionized water, 30% ethylene glycol/water mixtures, silicone oils (up to 150 cSt), and low-temperature fluorinated solvents—subject to chemical compatibility verification per manufacturer guidelines. Its stainless-steel 304 inner tank (6 L or 15 L variants) resists corrosion and facilitates cleaning between experiments. From a regulatory standpoint, the instrument supports GLP-compliant workflows through time-stamped temperature logging (stored internally with graph/table export via USB), programmable SOP execution, and configurable alarm thresholds. While not inherently 21 CFR Part 11 compliant, its data output format (CSV) is compatible with validated LIMS and ELN platforms for audit-trail integration. The unit meets CE marking requirements per EN 61010-1:2010 (Safety) and EN 61326-1:2013 (EMC), and conforms to ISO/IEC 17025 clause 6.4.7 regarding environmental condition monitoring equipment qualification.

Software & Data Management

The DCC series operates autonomously via its embedded firmware—no PC connection required for basic operation. All temperature programs, real-time curves, and historical logs are stored onboard with non-volatile memory retention (>10,000 cycles). Users may export session data (time-stamped temperature vs. time, setpoint deviations, alarm events) in CSV format via USB-A port for post-processing in Excel, MATLAB, or statistical analysis software. Graphical trend views include zoom, pan, and overlay functions for comparative analysis across multiple runs. Firmware updates are delivered via USB stick, ensuring field-upgradability without service intervention. Optional RS485 Modbus RTU interface (available on select DCC models) enables integration into centralized building management systems or automated test sequences using SCADA-compatible controllers.

Applications

• Calibration and verification of temperature-sensitive instruments (e.g., digital thermometers, IR sensors, DSC reference cells)
• Thermal conditioning of samples prior to rheological, spectroscopic, or chromatographic analysis
• Temperature-controlled reaction baths for synthetic chemistry, polymerization studies, or enzymatic assays
• Stabilization of optical components (e.g., CCD detectors, laser diodes) requiring sub-0.1 °C thermal uniformity
• Supporting ASTM D2857 (FTIR), ISO 11357-3 (DSC), and USP environmental chamber validation protocols
• External circulation to jacketed reactors, condensers, or rotary evaporators in pilot-scale process development

FAQ

What is the minimum operating temperature for the DCC4006 model?
The DCC4006 achieves a guaranteed minimum setpoint of −40 °C under standard laboratory conditions (23 °C ambient, 50% RH) with recommended coolant mixture.
Can the DCC bath be used with flammable solvents like acetone or ethanol?
No—flammable liquids are strictly prohibited due to internal electrical components and heater surface temperatures exceeding flash points. Only non-flammable, thermally stable fluids approved in the user manual should be used.
Is external circulation flow rate adjustable?
Flow rate is fixed at ≥8 L/min but can be throttled externally via needle valves on the outlet line; internal pressure relief safeguards against over-pressurization.
How often does the PT100 sensor require recalibration?
Per ISO/IEC 17025, annual verification against a NIST-traceable reference thermometer is recommended; factory calibration certificate is provided with each unit.
Does the DCC series support remote monitoring via Ethernet or Wi-Fi?
Standard models feature only USB and optional RS485; Ethernet/Wi-Fi connectivity is not available natively but may be added via third-party serial-to-Ethernet converters compatible with Modbus RTU.