Tongzhou Weipu T3 Benchtop Circulating Chiller

Overview

The Tongzhou Weipu T3 Benchtop Circulating Chiller is an integrated, compact refrigeration system engineered for precise thermal management of low-to-medium heat-load laboratory instruments. Utilizing a closed-loop phase-change refrigeration cycle with R134a or equivalent eco-compliant refrigerant, the T3 delivers stable, controllable cooling within a 5–35 °C operating range. Its design prioritizes spatial efficiency—measuring under 350 mm (W) × 450 mm (D) × 500 mm (H)—making it suitable for crowded benchtop environments where footprint and accessibility are critical. Unlike air-cooled chillers, the T3 employs a water-cooled condenser, enabling consistent performance in ambient temperatures up to 35 °C without derating, provided adequate facility water supply (inlet temperature ≤ 25 °C, flow ≥ 1.5 L/min, pressure 2–6 bar). The unit is constructed with corrosion-resistant stainless-steel reservoir and reinforced PVC-insulated circulation tubing to ensure long-term fluid integrity and minimal maintenance.

Key Features

• Integrated architecture with built-in refrigeration circuit, circulation pump, expansion tank, and PID-controlled temperature regulation—no external components required.
• Precision temperature control with ±0.1 °C stability over time, verified per ISO 17025-accredited calibration protocols using traceable Pt100 sensors.
• High-efficiency centrifugal circulation pump delivering 10 L/min at 1.1 bar head pressure, compatible with typical instrument inlet restrictions (e.g., < 0.8 bar backpressure).
• 4.5 L insulated stainless-steel reservoir with level sensor and low-level cutoff to prevent dry-run damage.
• Intuitive LED interface with dual-display: setpoint temperature and real-time bath temperature; adjustable ramp rate and hold time for programmable thermal profiles.
• Over-temperature, over-pressure, low-flow, and compressor overheat protection circuits compliant with IEC 61010-1 safety standards.

Sample Compatibility & Compliance

The T3 is specifically validated for continuous-duty operation with analytical instruments generating thermal loads between 300 W and 1500 W, including differential scanning calorimeters (DSC), thermogravimetric analyzers (TGA), bomb calorimeters, rotary evaporators (up to 5 L capacity), Kjeldahl digestion systems, vacuum distillation modules, and UV-Vis spectrophotometer Peltier accessories. It meets CE marking requirements for electromagnetic compatibility (EN 61326-1) and electrical safety (EN 61010-1). While not certified to FDA 21 CFR Part 11 out-of-the-box, its hardware architecture supports audit-trail-ready operation when integrated with validated LIMS or ELN platforms via optional RS485/Modbus RTU output.

Software & Data Management

The T3 operates autonomously via front-panel controls but includes a standard RS485 serial interface supporting Modbus RTU protocol for integration into centralized lab infrastructure. Optional USB-to-RS485 adapters enable direct connection to Windows-based acquisition software (e.g., LabVIEW, MATLAB, or custom Python scripts) for logging temperature, flow status, and compressor runtime. All operational events—including alarm triggers, setpoint changes, and power cycles—are timestamped and stored in non-volatile memory (retention ≥ 30 days). Data export is supported in CSV format for GLP-compliant record retention and trend analysis.

Applications

• Thermal stabilization of DSC and TGA sample stages during high-resolution heating/cooling ramps (e.g., ASTM E1356, ISO 11357).
• Cooling condenser jackets in rotary evaporation to maintain solvent recovery efficiency at reduced bath temperatures.
• Providing constant coolant supply to molecular pumps requiring ≤ 15 °C inlet water for optimal bearing lubrication and vacuum stability.
• Maintaining photodiode or CCD detector temperature in UV-Vis systems to minimize dark current drift and improve signal-to-noise ratio.
• Supporting exothermic digestion cycles in automated Kjeldahl systems by absorbing reaction heat without interrupting digestion kinetics.

FAQ

What is the maximum allowable ambient temperature for continuous operation?
The T3 is rated for uninterrupted duty at ambient temperatures up to 35 °C, assuming facility cooling water inlet temperature remains ≤ 25 °C and flow rate ≥ 1.5 L/min.
Can the T3 be used with deionized water or glycol-water mixtures?
Yes—compatible with DI water, 20–30% propylene glycol/water blends, or inhibited ethylene glycol solutions. Avoid chloride-containing fluids to prevent reservoir corrosion.
Is remote monitoring possible without third-party software?
Basic status readout (temperature, flow, alarm state) is accessible via Modbus register polling; full GUI-based remote control requires integration with host software.
Does the unit include a filtration system for the circulating fluid?
A 50 µm inline particulate filter is factory-installed upstream of the pump; replacement elements are available as consumables (Part No. T3-FIL-01).
How often does the refrigerant require servicing?
Under normal operation and leak-free conditions, the sealed refrigeration circuit requires no scheduled refrigerant replenishment over a 10-year service life; annual visual inspection of hoses and fittings is recommended.