Tianfeng TF-HX-30D Precision Refrigerated/Heating Circulating Bath

Overview

The Tianfeng TF-HX-30D Precision Refrigerated/Heating Circulating Bath is a high-stability, dual-mode temperature control system engineered for laboratory environments requiring precise thermal management across a broad operational range. Utilizing a hermetically sealed air-cooled compressor and an optimized evaporator design based on large-volume refrigeration principles, the unit delivers rapid cooling and uniform temperature distribution within its 30-liter stainless-steel bath chamber. Its integrated PID temperature controller—operated via a responsive touch-sensitive interface—enables stable setpoint maintenance at ±0.1 °C, supporting both static immersion experiments and dynamic external circulation applications. As a self-contained source of controlled thermal energy, the TF-HX-30D functions as either a primary bath for in-chamber assays or a secondary temperature-regulated fluid supply for externally coupled instrumentation.

Key Features

• Wide operational temperature range from −40 °C to +99 °C, accommodating cryogenic, ambient, and near-boiling experimental conditions
• Dual-circulation capability: internal recirculation for bath homogeneity; external pumping for remote thermal conditioning of auxiliary devices
• Stainless-steel bath tank with corrosion-resistant finish, ensuring long-term chemical compatibility and ease of cleaning
• Advanced PID control architecture with digital display of real-time temperature and programmable timer functions (delayed start/shutdown)
• Comprehensive safety monitoring including over-temperature and differential-temperature alarm systems
• Compact footprint with ergonomic operating height; designed for benchtop integration in constrained laboratory spaces
• ISO 9001:2000 certified manufacturing process, reflecting rigorous quality control throughout design, assembly, and functional validation

Sample Compatibility & Compliance

The TF-HX-30D supports aqueous, ethylene glycol–water, silicone oil, and other non-corrosive heat-transfer fluids compatible with its stainless-steel wetted components. It complies with general laboratory equipment safety standards applicable to Class II electrical appliances under IEC 61010-1. While not intrinsically rated for hazardous locations, its construction meets mechanical and thermal stability requirements for routine use in GLP-aligned research laboratories. The unit’s temperature accuracy and repeatability support method validation in accordance with ASTM E2777 (Standard Practice for Calibration of Liquid-in-Glass Thermometers) and ISO/IEC 17025 traceability frameworks when paired with NIST-traceable reference probes. No direct FDA 21 CFR Part 11 compliance is claimed; however, audit-ready operation logs may be generated via optional RS-232/USB data export.

Software & Data Management

The embedded microcontroller provides local real-time temperature logging with timestamped storage of up to 10,000 data points. Optional communication modules enable serial (RS-232) or USB connectivity for integration into centralized lab information management systems (LIMS). Raw temperature readings can be exported in CSV format for post-acquisition analysis in MATLAB, Python (NumPy/Pandas), or Excel. Firmware updates are performed via secure USB flash drive protocols. The interface does not include cloud synchronization or multi-user role-based access control; it is designed for single-operator, instrument-level data integrity without network dependencies.

Applications

• Thermal conditioning of rotary evaporators, viscometers, electrophoresis apparatus, and cryogenic medical devices (e.g., therapeutic cooling blankets)
• Cooling support for high-vacuum systems—including electron microscopes, ion pumps, diffusion pumps, and molecular pumps—where stable low-temperature heat sink performance is critical
• Controlled-rate sample preparation in pharmaceutical development, polymer characterization, and enzymatic kinetics studies
• Calibration of temperature-sensitive sensors and transducers against traceable reference standards
• Material property testing per ASTM D341 (viscosity–temperature charts), ISO 2555 (solution viscosity), and USP environmental control protocols
• Integration into multi-instrument reaction platforms with magnetic stirrers, freeze dryers, and vacuum pump systems

FAQ

What types of heat-transfer fluids are compatible with the TF-HX-30D?
Deionized water, 30–50% ethylene glycol/water mixtures, and low-viscosity silicone oils (up to 100 cSt at 25 °C) are recommended. Avoid halogenated solvents, strong acids/bases, or fluids exceeding 100 cSt viscosity.
Can the unit maintain temperature stability during external circulation?
Yes—the system maintains ±0.1 °C stability at the bath sensor location. External loop stability depends on tubing length, flow rate, insulation, and thermal load; typical field performance remains within ±0.3 °C under nominal 2 L/min flow conditions.
Is remote monitoring or Ethernet connectivity supported?
No native Ethernet or Wi-Fi interface is included. Remote supervision requires third-party serial-to-Ethernet converters or PLC-integrated SCADA gateways.
What is the warranty coverage and service response time?
One-year parts-and-labor warranty applies globally. On-site technical support is available in major industrial zones across China; international customers receive return-to-factory repair services with documented turnaround SLAs.
Does the unit meet CE or UL certification requirements?
It carries CE marking per EU Directive 2014/30/EU (EMC) and 2014/35/EU (LVD), verified by independent Notified Body testing. UL listing is not held; users requiring UL-compliant installations should consult their facility safety officer for equivalency evaluation.