Julabo FC1600T Circulating Chiller

Overview

The Julabo FC1600T is a high-performance, integrated air-cooled circulating chiller engineered for precise temperature control across demanding laboratory and pilot-scale applications. Based on vapor-compression refrigeration with a single-stage hermetic compressor and R134a refrigerant, the FC1600T delivers stable thermal management over an extended operational range of −25 °C to +80 °C—enabling both active cooling and electric heating within a single compact unit. Its dual-function architecture eliminates reliance on municipal tap water for heat rejection, significantly reducing water consumption while maintaining compliance with modern sustainability benchmarks in research facilities. Designed for continuous-duty operation under ambient conditions of 5–40 °C, the system integrates robust thermal insulation, pressure-regulated circulation, and real-time temperature monitoring to ensure reproducible thermal environments for sensitive instrumentation—including spectrophotometers, NMR precooling loops, laser diode mounts, and reaction calorimeters.

Key Features

• Wide operating temperature span (−25 °C to +80 °C) supported by simultaneous refrigeration and 1.2 kW resistive heating
• Air-cooled condenser design—no external water supply or drainage required; ideal for labs with limited plumbing infrastructure
• High-precision temperature stability of ±0.1 °C at setpoint, achieved via PID-controlled refrigeration cycle and dual LED display interface
• Adjustable outlet-to-inlet temperature differential setting for optimized thermal coupling with external devices
• Integrated Pt100 sensor input for external process temperature feedback and closed-loop control integration
• Analog I/O (0–10 V / 0–24 mA) enables direct connection to programmable logic controllers (PLCs), data loggers, or SCADA systems
• RS232 serial port (optional) and Profibus interface support remote configuration, alarm logging, and audit-ready data export
• Self-diagnostic system with visual pressure indication (0–4.0 bar), reservoir level monitoring, and compressor status feedback
• Ergonomic top-fill reservoir with dual-diameter hose fittings (8 mm and 12 mm ID) and M16×1 pump ports for rapid fluid connection

Sample Compatibility & Compliance

The FC1600T is compatible with standard heat-transfer fluids including deionized water, 30% ethylene glycol/water mixtures, and low-conductivity silicone oils—provided fluid viscosity remains below 50 cSt at operating temperature. Its sealed refrigeration circuit complies with EU Regulation (EC) No 842/2006 on fluorinated greenhouse gases and meets CE marking requirements per Directive 2014/30/EU (EMC) and 2014/35/EU (LVD). The unit supports GLP- and GMP-aligned workflows through configurable event logging, password-protected parameter access, and timestamped temperature history—facilitating traceability in regulated environments such as pharmaceutical QC labs or ISO/IEC 17025-accredited testing facilities. While not intrinsically rated for hazardous locations, its electrical architecture conforms to IEC 61000-6-2 (immunity) and IEC 61000-6-4 (emissions) standards.

Software & Data Management

The FC1600T operates autonomously via its onboard microcontroller but supports advanced telemetry through optional digital interfaces. RS232 communication permits bidirectional command exchange using ASCII-based protocol (e.g., “TEMP?” for current bath temperature, “SET=25.0” for setpoint update), enabling seamless integration into LabVIEW, MATLAB, or Python-based automation frameworks. Analog outputs allow passive recording of actual temperature, refrigeration load, or pump status on third-party chart recorders or distributed control systems. All critical operational parameters—including compressor runtime, fault codes, and thermal deviation history—are stored in non-volatile memory for post-event analysis. Optional software packages provide trend visualization, alarm threshold customization, and CSV-exportable session logs compliant with FDA 21 CFR Part 11 requirements when deployed with appropriate user access controls and electronic signature validation.

Applications

• Stabilization of high-power lasers and optical benches requiring sub-0.2 °C thermal drift control
• Cooling of rotary evaporators, distillation columns, and jacketed reactors in synthetic chemistry workflows
• Thermal conditioning of HPLC column ovens, autosamplers, and detector cells to improve chromatographic resolution
• Precooling of cryogenic sample stages in materials science characterization (e.g., XRD, SEM-EDS)
• Temperature regulation of fuel cell test stations, battery cycling chambers, and electrochemical workstations
• Support of accelerated stability studies per ICH Q1A(R2) guidelines where controlled thermal stress profiles are mandated

FAQ

What is the maximum allowable inlet fluid temperature for continuous operation?
The FC1600T accepts return fluid up to 80 °C, enabling compatibility with externally heated systems without thermal shock to the chiller’s internal heat exchanger.
Can the FC1600T operate unattended for extended periods?
Yes—its continuous-duty rating, auto-restart after power interruption, and comprehensive safety interlocks (high-pressure cutoff, dry-run protection, overtemperature lockout) support 24/7 deployment in automated laboratories.
Is remote monitoring possible without additional hardware?
Basic status readout (temperature, error code) is available via front-panel display; full remote control requires optional RS232 cable and host-side terminal software or custom API integration.
Does the unit require periodic refrigerant servicing?
No—the sealed R134a circuit is maintenance-free under normal operation; only routine inspection of air filters and condenser fins is recommended every 6 months.
How does the FC1600T handle fluid expansion during heating cycles?
The 8–11 L reservoir includes an integrated expansion chamber and pressure-relief valve calibrated to 3.5 bar, accommodating volumetric changes of common heat-transfer fluids across the full −25 °C to +80 °C range.