Hanuo HX-0508 Cryogenic Constant Temperature Circulator

Overview

The Hanuo HX-0508 Cryogenic Constant Temperature Circulator is an engineered thermal management system designed for precise, stable, and reliable temperature control across demanding laboratory applications in life sciences, pharmaceutical R&D, materials testing, and analytical instrumentation. Operating within a broad thermal range of –5 °C to +105 °C, the unit delivers high-fidelity temperature regulation through a dual-circulation architecture—combining high-uniformity internal bath circulation with a robust external pumping loop capable of sustained flow rates between 16 and 18 L/min. Its core thermal regulation relies on a closed-loop refrigeration circuit featuring a high-efficiency, air-cooled, hermetically sealed compressor, coupled with a microprocessor-controlled PID algorithm that ensures rapid thermal response and exceptional setpoint accuracy (±0.05 °C) with 0.01 °C digital resolution. Unlike basic chillers or heating baths, the HX-0508 functions as a dynamic heat exchange platform—capable of both extracting and delivering thermal energy to external devices (e.g., spectrophotometer cells, reaction jackets, calorimeters, or chromatography columns), making it integral to temperature-dependent experimental workflows requiring reproducibility under GLP- and GMP-aligned conditions.

Key Features

• Wide operational temperature span: –5 °C to +105 °C, enabling both cryogenic reaction support and high-temperature stability without auxiliary equipment
• Dual-circulation design: Independent internal recirculation ensures bath homogeneity; externally regulated pump delivers consistent, pulse-free flow to peripheral instruments
• Stainless steel bath chamber (304 grade): Chemically inert, corrosion-resistant, and compliant with ISO 15190:2020 requirements for laboratory safety and cleanliness
• Intelligent microprocessor controller with real-time PID tuning, user-adjustable ramp rates, and offset correction for sensor calibration drift
• Comprehensive safety architecture: Dual-stage over-temperature cutoff, compressor overheat/overcurrent protection, and audible/visual fault indication
• High-resolution digital display (0.01 °C) with intuitive keypad interface—no proprietary software required for basic operation
• Compact footprint (320 × 370 × 670 mm) optimized for benchtop integration in space-constrained labs

Sample Compatibility & Compliance

The HX-0508 accommodates standard laboratory vessels—including jacketed flasks (up to 500 mL), immersion probes, cuvette holders, and external heat exchangers—within its 8 L stainless steel bath. Its external port configuration supports connection to third-party equipment via standard 1/2″ BSP or NPT fittings. From a regulatory standpoint, the system meets IEC 61010-1:2010 (Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use) and complies with electromagnetic compatibility per EN 61326-1:2013. While not FDA 21 CFR Part 11–certified out-of-the-box, its deterministic control logic, non-volatile parameter storage, and audit-ready error logging support integration into validated environments when paired with documented SOPs and periodic verification protocols aligned with ASTM E2500 and ISO/IEC 17025.

Software & Data Management

The HX-0508 operates autonomously via its embedded controller and does not require host PC connectivity for routine use. However, optional RS485 serial interface (Modbus RTU protocol) enables integration into centralized lab monitoring systems for remote setpoint adjustment, real-time temperature telemetry, and event-triggered data logging. When deployed in regulated settings, users may configure external SCADA or LIMS platforms to capture timestamped temperature values, alarm states, and runtime diagnostics—supporting traceability and electronic record integrity per ALCOA+ principles. No cloud-based firmware updates or proprietary drivers are employed; all operational parameters reside locally and remain unaffected by network interruptions.

Applications

• Temperature-controlled enzymatic assays and protein stability studies in molecular biology labs
• Calibration of thermocouples, RTDs, and infrared sensors against NIST-traceable references
• Thermal conditioning of HPLC autosampler trays and column ovens to minimize retention time drift
• Material testing of polymers, adhesives, and composites under controlled thermal cycling (–5 °C to +105 °C)
• Supporting low-temperature crystallization experiments and high-temperature solubility profiling
• Providing stable coolant supply to laser sources, CCD detectors, and vacuum pump chillers

FAQ

What is the maximum external load capacity supported by the HX-0508’s circulation system?
The unit maintains specified temperature stability when delivering 16–18 L/min against a typical backpressure of ≤1.5 bar—suitable for most jacketed reactors and analytical accessories with ≤3 m total tubing length (½″ ID).

Can the temperature sensor be calibrated in situ?
Yes—the controller includes a manual offset adjustment function (±5.00 °C range, 0.01 °C increments) allowing users to compensate for probe-specific deviations using a certified reference thermometer.

Is the bath fluid compatible with glycol-water mixtures?
The system is fully compatible with aqueous ethylene or propylene glycol solutions up to 50% v/v; however, viscosity increases above this concentration may reduce effective flow rate and thermal transfer efficiency.

Does the unit include documentation for IQ/OQ validation?
Hanuo provides a Factory Acceptance Test (FAT) report and mechanical/electrical schematics. Full Installation Qualification (IQ) and Operational Qualification (OQ) protocols must be developed internally or by a qualified third party per user-defined acceptance criteria.

What maintenance intervals are recommended for long-term reliability?
Compressor oil and refrigerant levels require verification every 24 months; air filter cleaning is advised quarterly; stainless steel bath should be rinsed with deionized water after use with aggressive solvents or salt solutions.