Hanuo DC-0510 Precision Refrigerated Circulating Bath

Overview

The Hanuo DC-0510 Precision Refrigerated Circulating Bath is an engineered thermal management system designed to deliver stable, uniform, and precisely controllable temperature environments for laboratory and industrial applications. Operating on the principle of forced convection via a high-efficiency dual-mode (refrigeration + heating) thermoregulatory loop, it maintains setpoint accuracy within ±0.05 °C across its full operational range of −5 °C to 100 °C. The unit integrates a hermetically sealed compressor-based refrigeration circuit with resistive heating elements, enabling seamless transition between cooling and heating without manual intervention. Its all-stainless-steel bath chamber (304 grade), combined with a corrosion-resistant deck and insulated housing, ensures long-term reliability in demanding chemical, biological, and physical testing environments. Unlike passive water baths, the DC-0510 actively circulates temperature-controlled fluid—whether water, ethanol–water mixtures, or silicone oil—through both internal pathways and external closed-loop circuits, making it suitable not only as a primary test environment but also as a secondary thermal source for jacketed reactors, viscometers, spectrophotometer cells, or calorimetric modules.

Key Features

• Full stainless steel (304) construction for bath interior, lid, and work surface—resistant to acids, alkalis, and organic solvents
• Digital PID temperature controller (XMT series) with intuitive front-panel interface, real-time digital display, and programmable setpoint retention
• Dual-mode thermal regulation: simultaneous heating and refrigeration capability ensures rapid thermal equilibration and tight setpoint adherence
• Integrated internal/external circulation pump (4 L/min flow rate) with adjustable pressure output and quick-connect ports for auxiliary loops
• Comprehensive safety architecture: compressor overheat protection, current overload cutoff, low-level fluid alarm, and dry-run prevention
• Compact vertical footprint (250 × 200 × 200 mm bath dimensions) optimized for benchtop integration; optional DCW-series horizontal variants available for under-bench installation

Sample Compatibility & Compliance

The DC-0510 accommodates a broad spectrum of sample configurations—including immersion probes, reaction vessels up to 5 L, jacketed glassware, and sensor calibration fixtures—via its open-bath geometry and standardized external port interface. It supports common heat-transfer fluids: deionized water (−5 °C to 95 °C), 30% ethylene glycol/water (−20 °C to 90 °C), and silicone oils (up to 100 °C). While not certified to ISO/IEC 17025 or ASTM E2877 for metrological traceability out-of-the-box, the system’s ±0.05 °C stability meets routine requirements for ASTM D2196 (viscosity), ISO 2555 (solution viscosity), and USP environmental qualification protocols when paired with NIST-traceable external reference thermometers. Its sealed mechanical design and absence of exposed electrical components in the bath chamber comply with IEC 61010-1:2010 safety standards for laboratory equipment.

Software & Data Management

The DC-0510 operates as a standalone instrument with no proprietary software dependency. Temperature setpoints, real-time readings, and alarm status are managed entirely through its embedded XMT controller. For laboratories requiring data logging or remote supervision, analog 0–5 V or 4–20 mA output signals (optional configuration) enable integration with SCADA systems, LIMS platforms, or programmable logic controllers (PLCs). When deployed in GLP- or GMP-regulated environments, users may implement external validation protocols—including IQ/OQ documentation, periodic temperature mapping (per ISO 14644-3), and audit-trail-enabled data acquisition—to satisfy FDA 21 CFR Part 11 requirements for electronic records.

Applications

• Calibration of temperature-sensitive analytical instruments (e.g., HPLC column ovens, FTIR sample compartments, densitometers)
• Controlled-rate cooling/heating for polymer crystallization studies, phase transition analysis, and thermal aging tests
• Stabilization of laser sources, photodetectors, and optical benches requiring sub-0.1 °C thermal drift suppression
• Support of rheological measurements where bath temperature directly influences shear viscosity (e.g., ASTM D445, ISO 3104)
• Cell culture incubator pre-conditioning, enzyme activity assays, and microbiological growth studies requiring precise thermal control
• QC/QA testing in pharmaceutical manufacturing for dissolution apparatus temperature verification (USP )

FAQ

What fluids are compatible with the DC-0510 at −5 °C?
Deionized water with 20–25% propylene glycol (by volume) is recommended for reliable operation at −5 °C. Ethanol–water mixtures are acceptable but require vapor containment due to flammability.
Can the DC-0510 maintain temperature stability during external load fluctuations?
Yes—the PID algorithm dynamically adjusts compressor duty cycle and heater power output to compensate for thermal loads up to 500 W introduced via external loops, provided ambient temperature remains between 15–30 °C and ventilation clearances are maintained.
Is the unit suitable for continuous unattended operation?
It is rated for 24/7 operation under standard laboratory conditions; however, weekly visual inspection of fluid level, pump seal integrity, and condenser coil cleanliness is advised to ensure longevity.
Does the DC-0510 support RS232 or USB communication?
No native serial or USB interface is included. Communication requires optional analog signal output modules or third-party hardware adapters compliant with Modbus RTU or 0–10 V protocols.
How is temperature uniformity validated inside the bath chamber?
Uniformity is verified per ASTM E742 using a minimum of nine calibrated PT100 probes arranged in a 3×3 grid at mid-depth; typical results show ≤±0.03 °C spatial deviation at 25 °C and ≤±0.08 °C at −5 °C.