Julabo FC1200 Circulating Chiller

Overview

The Julabo FC1200 Circulating Chiller is an integrated, air-cooled temperature control system engineered for high-precision thermal management in demanding laboratory and pilot-scale applications. Based on vapor-compression refrigeration with integrated electric heating, the FC1200 delivers stable, programmable cooling and heating across a wide operational range of –20 °C to +80 °C. Its dual-mode architecture enables seamless transition between cooling and heating without external switching—critical for processes requiring dynamic temperature ramps, such as reaction calorimetry, spectroscopy cell conditioning, or chromatography column thermostating. Designed and manufactured in Germany, the unit complies with IEC 61000-6-3 (EMC emissions) and IEC 61000-6-2 (immunity), and meets CE marking requirements for safety (EN 61010-1). Unlike tap-water-based cooling, the FC1200 eliminates water waste, reduces risk of leaks and scaling, and ensures consistent thermal performance independent of municipal supply fluctuations.

Key Features

• Integrated refrigeration and heating system with 1.2 kW electric heater and up to 1.3 kW refrigeration capacity at 20 °C ambient
• Air-cooled condenser with low-noise fan assembly—no external water source or drainage required
• Dual LED display showing both setpoint and actual bath/outlet temperature simultaneously
• Adjustable outlet-to-inlet temperature differential control, enabling precise thermal coupling with external equipment
• Top-fill reservoir with integrated level indicator and visual fill window for rapid, spill-free refilling
• High-flow, low-pulsation circulation pump delivering 20 L/min at 0.5 bar pressure, compatible with standard 8 mm and 12 mm ID tubing
• Optional analog (0–10 V / 4–20 mA) and digital (RS232, Profibus DP) interfaces for integration into centralized lab automation or SCADA systems
• Robust stainless-steel and powder-coated steel housing; IP20-rated enclosure suitable for ISO Class 7 cleanroom-adjacent environments

Sample Compatibility & Compliance

The FC1200 is designed for closed-loop circulation with external instruments including rotary evaporators, spectrophotometers, laser sources, NMR probe coolers, and analytical HPLC systems. Its maximum allowable return fluid temperature of 80 °C permits safe integration with heated reactors or high-temperature process lines. The unit supports external Pt100 sensor feedback for remote temperature monitoring and closed-loop correction—essential for GLP/GMP-compliant workflows. While not intrinsically rated for hazardous areas, its electrical design conforms to EN 61010-1 for measurement, control, and laboratory use. For audit-trail requirements, optional RS232 logging (via third-party software) supports time-stamped temperature and status data capture compliant with FDA 21 CFR Part 11 when paired with validated software and access controls.

Software & Data Management

The FC1200 operates autonomously via front-panel controls but offers full remote supervision through its optional RS232 interface. When connected to a PC or PLC, users can configure setpoints, ramp rates, hold times, and alarm thresholds using ASCII command protocol. Third-party software—including LabVIEW drivers and custom Python scripts—can log real-time temperature, pump status, compressor duty cycle, and error codes at user-defined intervals. Analog output signals enable direct connection to chart recorders or distributed control systems (DCS). No proprietary software license is required; all communication protocols are publicly documented in the Julabo FC Series Technical Manual (Rev. 5.2, 2023).

Applications

• Thermostating of analytical instrumentation requiring stable heat sink performance (e.g., UV-Vis detectors, FTIR sample compartments)
• Cooling of high-power lasers and LED arrays where thermal drift impacts wavelength stability
• Temperature control of jacketed glass reactors during exothermic synthesis or cryogenic crystallization
• Supporting cold-trap operation in vacuum distillation setups with sustained sub-zero bath temperatures
• Calibration of temperature-sensitive sensors and transducers under controlled thermal gradients
• Pilot-scale bioreactor jacket cooling where precise ΔT between coolant and vessel wall is critical for metabolic control

FAQ

What is the maximum permissible inlet fluid temperature when using the FC1200 in cooling mode?
The unit accepts return fluid up to 80 °C—enabling compatibility with externally heated loops, provided the chiller’s internal refrigeration capacity remains sufficient to achieve the desired outlet temperature.
Can the FC1200 maintain ±0.1 °C stability over extended periods?
The specified temperature stability is ±0.2 °C under steady-state conditions per DIN 12876-1; improved stability may be achieved with optimized external loop design and reduced thermal load variability.
Is glycol/water mixture compatible with the FC1200’s fluid circuit?
Yes—the system is compatible with aqueous solutions containing up to 30% (v/v) inhibited propylene glycol; consult Julabo’s Chemical Compatibility Guide (Doc. #CH-FC-2022) for seal material recommendations.
Does the FC1200 support automatic defrost cycles?
No—its air-cooled design eliminates frost accumulation under normal operating conditions within the specified ambient range (5–40 °C); no manual or automatic defrost function is implemented.
What maintenance intervals are recommended for long-term reliability?
Julabo recommends annual inspection of condenser coil cleanliness, refrigerant charge verification (by certified technician), and pump seal integrity check—documented in the Maintenance Log per ISO/IEC 17025 clause 6.4.4.