Tianfeng TF-HX-20F Advanced Circulating Chiller/Heater with Dual-Mode Temperature Control

Overview

The Tianfeng TF-HX-20F Advanced Circulating Chiller/Heater is a dual-mode, high-stability temperature control system engineered for precision laboratory applications requiring both sub-ambient and elevated thermal environments. Unlike conventional oil or water baths limited to passive heating, this unit integrates a fully sealed, air-cooled refrigeration circuit with resistive heating elements and a robust stainless-steel bath chamber—enabling continuous, bidirectional temperature regulation from −60 °C to +99 °C with long-term stability of ±0.1 °C. Its operation relies on forced convection via an internal circulation pump and optional external fluid routing, establishing a thermally uniform, dynamically controlled environment suitable for calibration, reaction kinetics, material property testing, and equipment cooling. Designed for integration into complex lab workflows, the TF-HX-20F functions both as a standalone thermostatic bath and as a remote temperature source—supplying conditioned fluid to peripheral instruments including rotary evaporators, viscometers, electrophoresis systems, cryogenic accessories (e.g., cooling caps and hypothermia blankets), and high-vacuum components such as diffusion pumps and ion pumps.

Key Features

• High-efficiency air-cooled hermetic compressor system with imported core components, delivering rapid cooldown and stable low-temperature performance down to −60 °C
• Dual-circulation architecture supporting simultaneous internal bath homogenization and external fluid delivery via reinforced silicone tubing ports
• PID-based digital temperature controller with touch-sensitive soft-key interface, real-time numeric display of setpoint/actual temperature, and programmable time-based start/stop functions
• Stainless-steel inner tank (304 grade) resistant to corrosion from organic solvents, silicone oils, and aqueous media—ensuring long service life and contamination-free operation
• Comprehensive safety suite including over-temperature cutoff, differential-temperature alarm, and automatic fault logging for GLP-compliant documentation
• Compact footprint optimized for benchtop or floor-standing installation; modular design facilitates maintenance access to compressor, evaporator, and control board

Sample Compatibility & Compliance

The TF-HX-20F accommodates a broad range of working fluids—including silicone oil (for high-temperature stability), ethylene glycol/water mixtures (for extended low-temperature operation), and deionized water—without risk of degradation or leakage. Its sealed bath design prevents evaporation loss and minimizes operator exposure during extended runs. All electrical and mechanical subsystems conform to IEC 61010-1 safety standards for laboratory equipment. The manufacturing process adheres to ISO 9001:2000 quality management protocols, with full traceability across raw materials, assembly, and final functional testing. While not inherently 21 CFR Part 11 compliant, the device supports audit-ready operation when paired with validated third-party data acquisition software that implements electronic signatures, change control, and secure audit trails—making it suitable for GMP/GLP-regulated environments in pharmaceutical development and quality control labs.

Software & Data Management

The unit operates autonomously via its embedded microcontroller and requires no external PC connection for basic function. However, optional RS-485 or USB-to-serial interfaces enable integration with LabVIEW, MATLAB, or custom SCADA platforms for automated temperature ramping, multi-step protocols, and synchronized data logging. Temperature readings are sampled at 1 Hz resolution and stored in non-volatile memory for up to 72 hours of continuous operation. Exportable CSV logs include timestamp, setpoint, actual bath temperature, compressor status, and alarm events—facilitating post-run analysis and regulatory submission. Firmware updates are delivered via secure encrypted firmware packages, with version rollback capability to ensure continuity during validation requalification.

Applications

• Controlled-temperature synthesis and catalytic reaction studies in fine chemical and polymer laboratories
• Thermal conditioning of samples prior to rheological, DSC, or TGA analysis
• Cooling support for electron microscopy systems, laser sources, and RF amplifiers requiring stable heat sink performance
• Calibration of temperature-sensitive sensors (RTDs, thermistors, infrared pyrometers) across wide dynamic ranges
• Stabilization of electrophoresis buffers and chromatographic columns in molecular biology and analytical chemistry workflows
• Long-duration stability testing of pharmaceutical formulations under ICH Q1A-recommended storage conditions

FAQ

Can the TF-HX-20F be used with silicone oil at 99 °C without degradation?

Yes—the stainless-steel bath and sealing materials are rated for continuous operation at 100 °C with standard methylphenyl silicone oils; thermal oxidation resistance is verified per ASTM D92 flash point testing.
Is external circulation flow rate adjustable?

The integrated centrifugal pump delivers 15–25 L/min depending on line resistance and fluid viscosity; flow can be throttled using inline needle valves compatible with standard 10-mm OD tubing.
Does the unit meet CE marking requirements?

While currently certified to ISO 9001:2000 and compliant with IEC 61010-1, CE marking requires additional EU Declaration of Conformity documentation and may be provided upon request for export orders.
What is the recommended maintenance interval?

Compressor oil and refrigerant charge require verification every 24 months under normal use; condenser coil cleaning is advised quarterly in dusty environments.
Can multiple units be networked for synchronized temperature control?

Yes—via Modbus RTU over RS-485, up to 32 units can be daisy-chained and coordinated through a central HMI or PLC for large-scale thermal array applications.