Tianfeng TF-HX-10D Precision Circulating Chiller/Heater Bath

Overview

The Tianfeng TF-HX-10D is a compact, high-stability circulating chiller/heater bath engineered for precise thermal control in analytical, pharmaceutical, and materials science laboratories. It operates on a dual-mode thermoregulation principle—combining vapor-compression refrigeration with resistive heating—to deliver stable, uniform temperature environments across a broad operational range from −40 °C to +99 °C. Its core architecture integrates a hermetically sealed, air-cooled compressor with an imported refrigeration unit, enabling rapid cooling kinetics and minimal thermal gradient within the 10 L stainless steel bath chamber. Unlike passive water baths, the TF-HX-10D supports both internal immersion and external circulation via integrated pump-driven fluid transfer, making it suitable for jacketed reactors, viscometers, spectrophotometer cells, and other externally cooled instrumentation requiring calibrated thermal input.

Key Features

• High-efficiency air-cooled refrigeration system with imported compressor and optimized evaporator geometry—designed for accelerated cooldown and improved spatial temperature uniformity.
• Dual-mode temperature control (refrigeration + heating) with PID-based digital regulation ensures ±0.1 °C stability under steady-state conditions, verified per ISO 17025 traceable calibration protocols.
• Full stainless steel interior and work surface (AISI 304 grade) provide corrosion resistance, ease of decontamination, and compliance with GLP laboratory hygiene standards.
• Intuitive touch-sensitive soft-key interface with dual digital display for real-time monitoring of setpoint temperature and elapsed operation time.
• Programmable timer functions including scheduled startup and delayed shutdown—supporting unattended overnight experiments and energy-efficient operation cycles.
• Integrated safety logic includes over-temperature cutoff, differential-temperature alarm (detecting abnormal bath-to-sensor deviation), and automatic fault logging.
• External circulation port with pressure-regulated flow output (max. 15 L/min at 0.2 MPa) enables connection to auxiliary equipment such as rotary evaporators or calorimeters.

Sample Compatibility & Compliance

The TF-HX-10D accommodates standard laboratory vessels up to Ø150 mm × 200 mm height and supports compatibility with aqueous, ethylene glycol–water, and silicone oil working fluids (viscosity ≤ 50 cSt). Its mechanical footprint (452 × 313 × 797 mm) and low-noise operation (<58 dB(A)) allow integration into fume hoods, laminar flow cabinets, and shared instrument benches. The unit complies with IEC 61010-1:2010 for electrical safety in laboratory equipment and meets CE marking requirements for EMC (EN 61326-1) and low-voltage directives. While not certified for Class I Div 1 hazardous locations, its sealed construction and absence of ignition sources render it appropriate for general-purpose use under ISO/IEC 17025-accredited QA/QC workflows.

Software & Data Management

The TF-HX-10D operates as a standalone analog-digital hybrid controller with no embedded firmware update capability or USB/Ethernet connectivity. All operational parameters—including setpoint, actual bath temperature, run time, and alarm status—are displayed locally on the front-panel LED interface. For audit-trail compliance in regulated environments (e.g., FDA 21 CFR Part 11–aligned labs), users are advised to log temperature readings manually or integrate the unit with external data acquisition systems via optional 4–20 mA analog output (available on request). No proprietary software or cloud platform is associated with this model; configuration remains fully hardware-based and deterministic.

Applications

• Calibration of temperature-sensitive sensors (RTDs, thermistors, infrared pyrometers) against NIST-traceable reference standards.
• Thermal conditioning of samples prior to rheological testing (e.g., Brookfield viscometry), DSC, or TGA analysis.
• Cooling of HPLC column ovens, UV-Vis spectrophotometer cuvette holders, and laser diode mounts.
• Controlled-rate crystallization studies in pharmaceutical development and polymorph screening.
• Environmental stress testing of electronic components and adhesives under defined thermal cycling profiles.
• Support of enzymatic reaction kinetics assays requiring sub-zero stabilization of reagent solutions.

FAQ

What types of heat transfer fluids are compatible with the TF-HX-10D?

Deionized water, 30–50% ethylene glycol/water mixtures, and low-viscosity silicone oils (up to 50 cSt) are validated for use. Avoid halogenated solvents or highly corrosive media.
Does the unit support external temperature feedback control?

No—the TF-HX-10D uses internal Pt100 sensor feedback only. External probe integration is not supported in standard configuration.
Is the bath suitable for long-term continuous operation?

Yes. Designed for 24/7 duty cycle with thermal overload protection and compressor duty-cycle management.
Can the external circulation be used without internal bath immersion?

Yes—fluid can be routed exclusively through the external loop while maintaining bath temperature stability, provided minimum flow resistance is observed.
What maintenance intervals are recommended?

Compressor oil inspection every 24 months; condenser coil cleaning every 6 months in dusty environments; annual verification of temperature sensor accuracy using certified reference thermometer.