Shanghai Hengping DC8006 Advanced Ultra-Low Temperature Circulating Bath

Overview

The Shanghai Hengping DC8006 is an ultra-low temperature circulating bath engineered for precision thermal control in demanding laboratory and industrial R&D applications. Utilizing a two-stage compressor refrigeration system, it achieves stable operation across an exceptionally wide temperature range—from −80 °C to +100 °C—making it suitable for cryogenic sample conditioning, low-temperature reaction monitoring, and high-stability calibration tasks. Its thermally insulated stainless-steel bath chamber (150 × 145 × 150 mm internal dimensions) ensures uniform temperature distribution and minimal thermal gradient across the working volume. The unit employs microprocessor-based PID control with auto-tuning capability, enabling rapid thermal equilibration and maintaining temperature stability within ±0.05 °C under static and dynamic load conditions. Designed for integration into complex analytical workflows, the DC8006 supports both internal recirculation and external fluid transfer via a high-flow (8 L/min), corrosion-resistant circulation pump—critical for coupling with rotary evaporators, spectrometers, rheometers, and semiconductor process equipment.

Key Features

• Two-stage compressor refrigeration system optimized for rapid cooldown to −80 °C without liquid nitrogen or dry ice dependency
• Dual digital display: separate LED windows for setpoint and real-time bath temperature (0.1 °C resolution)
• Intelligent safety architecture including thermocouple break protection, low-level fluid alarm, and lower-limit overcooling shutdown
• Ergonomic foldable side handles and reinforced base for safe handling and placement on vibration-isolated lab benches
• Robust 304 stainless-steel inner tank with polished finish, resistant to corrosion from water, ethanol, silicone oil, and other common heat-transfer media
• Adjustable external circulation pressure and flow rate—compatible with closed-loop systems up to 10 m head height
• Thermal insulation layer minimizes ambient heat ingress, improving energy efficiency and long-term stability at sub-zero setpoints

Sample Compatibility & Compliance

The DC8006 accommodates diverse thermal management requirements across physical chemistry, materials science, and life sciences laboratories. It supports immersion of probes, sensors, optical cells, reactor jackets, and analytical instrument cooling interfaces—including ICP-MS chillers, NMR pre-cooling stages, CCD detector housings, and vacuum deposition chamber cold traps. The bath’s temperature uniformity (±0.05 °C) meets ASTM E1137/E1142 specifications for laboratory thermal stability verification. While not certified to ISO/IEC 17025 as a standalone metrology device, its control architecture and traceable calibration support adherence to GLP and GMP documentation practices. All electrical components comply with IEC 61010-1 safety standards for laboratory equipment. For regulated environments, optional RS485 Modbus RTU interface enables audit-ready data logging and remote supervision compatible with SCADA and LIMS platforms.

Software & Data Management

The DC8006 operates as a stand-alone thermal source but offers scalable digital integration. Optional communication modules (RS232 or RS485) provide bidirectional command-and-control capability using standard Modbus RTU protocol—enabling seamless interfacing with LabVIEW, MATLAB, Python-based automation scripts, or enterprise-grade laboratory information management systems (LIMS). Users may configure up to 30 programmable temperature segments with ramp-hold profiles, supporting time-resolved experiments such as accelerated aging studies or controlled crystallization protocols. An optional extended PT100 sensor allows real-time feedback from external vessels, closing the loop for cascade temperature control applications. All configuration changes, setpoint adjustments, and alarm events are timestamped and retained in non-volatile memory—facilitating 21 CFR Part 11–compliant electronic recordkeeping when paired with validated host software.

Applications

• Calibration and verification of temperature-sensitive instrumentation (e.g., viscometers, refractometers, DSC reference cells)
• Cooling support for high-power lasers, superconducting magnets, and MRI cryo-coolers requiring stable sub-40 °C operation
• Thermal conditioning of polymer samples prior to DMA, TMA, or DMTA testing
• Controlled-temperature solvent baths for rotary evaporation of heat-labile compounds
• Stabilized thermal environment for XRD sample stages, electron microscope specimen holders, and thin-film deposition substrates
• Low-temperature activation of enzymatic assays and protein folding studies in biochemistry labs
• Environmental stress screening of electronic components and aerospace materials under thermal cycling protocols

FAQ

What is the minimum ambient temperature required for reliable operation at −80 °C?
For optimal performance and compressor longevity, ambient room temperature should be maintained between 15 °C and 25 °C. Operation above 30 °C significantly reduces cooling capacity and may trigger thermal overload protection.

Can the DC8006 circulate fluids other than water?
Yes—it is compatible with aqueous glycol solutions, silicone oils, and ethanol/water mixtures. Viscosity and thermal conductivity must remain within pump design limits (max. 50 cSt at operating temperature).

Is external temperature feedback supported out-of-the-box?
No—external PT100 input is an optional accessory. Standard configuration relies on internal platinum resistance thermometer (PRT) sensing only.

Does the unit include a drain valve for maintenance?
Yes—a front-mounted brass drain valve facilitates complete fluid evacuation without disassembly.

What is the expected service interval for compressor maintenance?
Under normal usage (≤8 hrs/day, ambient ≤25 °C), no scheduled compressor servicing is required within the first 36 months. Annual cleaning of condenser coils and air filters is recommended.