Hanuo SC-30 Constant Temperature Water & Oil Bath Circulator

Overview

The Hanuo SC-30 Constant Temperature Water & Oil Bath Circulator is an engineered thermal management system designed for precision temperature control in laboratory environments where reproducible thermal conditions are critical. Operating on the principle of forced convection via a dual-mode circulation pump, the SC-30 maintains uniform thermal distribution across its 30-liter working bath—whether filled with water or silicone oil—enabling stable operation from ambient temperature up to 100 °C. Its core architecture integrates a high-efficiency heating element, a thermally optimized stainless-steel bath chamber, and a microprocessor-controlled PID algorithm that continuously adjusts power output to minimize thermal overshoot and drift. Unlike basic immersion heaters or passive baths, the SC-30 delivers active thermal regulation suitable for calibration of reference thermometers (e.g., platinum resistance thermometers per ASTM E1137/E230), validation of thermal sensors, and controlled-temperature sample conditioning prior to analytical measurement.

Key Features

• Robust stainless-steel bath tank with corrosion-resistant finish and reinforced structural integrity for long-term use with both aqueous and organic heat-transfer fluids.
• Dual circulation capability: internal recirculation ensures homogeneous temperature distribution within the bath; external circulation enables closed-loop temperature control of external apparatus such as reaction jackets, viscometers, or spectrophotometer cells.
• PID digital temperature controller with dual LED display—simultaneously showing setpoint and real-time bath temperature—with intuitive touch-sensitive keypad interface and adjustable ramp rate settings.
• Thermal stability of ±0.05 °C at setpoints between 25 °C and 95 °C, verified under ISO/IEC 17025-compliant calibration protocols using traceable PT100 probes.
• Maximum external flow rate of 6 L/min at ≤0.3 bar backpressure, compatible with standard 10–16 mm ID silicone or PTFE tubing.
• Modular design supports optional integration with chiller units (e.g., Hanuo ZC-series) for rapid cooldown during exothermic process monitoring or post-heating quenching.

Sample Compatibility & Compliance

The SC-30 accommodates a wide range of sample containers—including glass beakers (up to 2 L), jacketed reactors, rotary evaporator condensers, and sensor calibration wells—without compromising thermal uniformity. Its open-bath configuration allows direct access for probe insertion, stirrer placement, or optical path alignment. The unit complies with IEC 61010-1:2010 safety standards for electrical equipment used in laboratory environments and meets CE marking requirements for electromagnetic compatibility (EMC Directive 2014/30/EU). While not inherently GLP/GMP-certified, the SC-30 supports audit-ready workflows when paired with validated temperature mapping procedures and electronic logbooks compliant with FDA 21 CFR Part 11 guidelines.

Software & Data Management

The SC-30 operates as a standalone instrument without proprietary software dependency. However, its analog voltage output (0–5 V DC proportional to temperature) and RS232 serial interface enable integration into third-party data acquisition systems (e.g., LabVIEW, MATLAB, or custom SCADA platforms) for time-stamped temperature logging, alarm triggering, and remote setpoint adjustment. Optional firmware upgrades support Modbus RTU protocol for industrial PLC interfacing. All temperature records generated externally may be archived with metadata (operator ID, timestamp, bath ID) to satisfy ISO 17025 clause 7.5.2 on result reporting traceability.

Applications

• Calibration of thermocouples, RTDs, and liquid-in-glass thermometers against national standards (e.g., NIST-traceable references).
• Thermal preconditioning of polymer melts, pharmaceutical suspensions, and colloidal dispersions prior to rheological or DSC analysis.
• Temperature stabilization of optical components during laser alignment or interferometric measurements.
• Controlled heating of enzymatic reaction mixtures in molecular biology workflows requiring narrow thermal tolerances.
• Support of ASTM D445 (kinematic viscosity), ASTM D97 (pour point), and ISO 3104 test methods where precise bath temperature maintenance is mandated.

FAQ

Can the SC-30 operate with silicone oil up to 100 °C?
Yes—the bath chamber and pump seals are rated for continuous operation with common silicone oils (e.g., Dow Corning 200 Fluid series) within the full specified temperature range.
Is external circulation compatible with pressurized systems?
No—the SC-30’s external pump is designed for open-loop or low-backpressure applications only; it is not rated for sealed, pressurized circuits.
What is the recommended maintenance interval for the circulation pump?
Inspect impeller clearance and seal integrity every 500 operational hours; replace pump oil annually if used with oil media.
Does the unit include factory calibration documentation?
Each SC-30 ships with a manufacturer’s certificate of conformance and a temperature uniformity report measured at three points (center + two corners) at 25 °C, 50 °C, and 80 °C.
Can the LED display be configured for °F?
No—the display is fixed in Celsius per IEC 60062 conventions; conversion must be performed externally.