Julabo FPW50-HE Universal Heating and Cooling Circulating Bath

Overview

The Julabo FPW50-HE Universal Heating and Cooling Circulating Bath is an engineered thermal management system designed for high-precision temperature control in demanding laboratory and industrial R&D environments. Built upon Julabo’s decades of German-engineered thermal expertise, the FPW50-HE employs a dual-stage refrigeration circuit with R404A refrigerant and integrated electric heating to deliver stable, programmable temperature control across an exceptionally wide operating range—from –50 °C to +200 °C. Its core function relies on forced convection via a stainless-steel centrifugal circulation pump, enabling both internal bath temperature stabilization and accurate external system conditioning (e.g., jacketed reactors, viscometers, spectrophotometers, or refractometers). The unit implements Intelligent Control Circuit (ICC) technology—a proprietary feedback algorithm that dynamically adjusts compressor output and heater duty cycle to minimize overshoot and maximize thermal homogeneity. This architecture ensures ±0.01 °C temperature stability under static load conditions, meeting the stringent repeatability requirements of ASTM E2779, ISO 17025-accredited calibration labs, and GLP-compliant analytical workflows.

Key Features

• VFD white high-brightness LCD display showing real-time bath temperature, setpoint, external sensor reading (if connected), pump status, and alarm codes—enabling at-a-glance operational verification.
• Waterproof membrane keyboard with tactile feedback for secure parameter entry in humid or solvent-prone lab environments.
• ATC3 three-point temperature calibration routine supporting traceable adjustment against NIST-traceable reference probes—critical for audit-ready documentation per FDA 21 CFR Part 11 Annex 11 requirements.
• SmartPump™ variable-speed circulation technology: automatically modulates pump motor power in response to fluid viscosity changes (e.g., ethylene glycol/water mixtures or silicone oils), maintaining consistent flow rates without manual recalibration.
• Integrated Pt100 input port for direct connection of external immersion sensors—enabling closed-loop control of process temperature at the point of use, not just within the bath reservoir.
• Low-level detection with audible/visual alarm and automatic heater/compressor shutdown to prevent dry-run damage and ensure equipment longevity.
• RS232 serial interface standard; optional Profibus DP module available for integration into centralized SCADA or MES platforms compliant with ISA-88/ISA-95 frameworks.
• Front-mounted drain valve and removable air-intake grilles facilitate routine maintenance—including condenser coil cleaning—without disassembly or service downtime.

Sample Compatibility & Compliance

The FPW50-HE accommodates a broad spectrum of heat transfer media, including deionized water, 50/50 ethylene glycol/water blends, silicone oils (up to 200 °C), and low-temperature ethanol/methanol mixtures. Its M16×1 quick-connect pump ports and 8 L internal reservoir support seamless integration with external systems having nominal tubing diameters of 8–12 mm. All electrical, mechanical, and refrigeration subsystems conform to IEC 61010-1 (Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use) and IEC 60335-1 (Household and Similar Electrical Appliances). The device carries CE marking and is manufactured under ISO 9001:2015 quality management systems. Refrigerant handling complies with EU F-Gas Regulation (EU) No 517/2014, and full GWP documentation (R404A = 3922) and CO₂-equivalent mass (1.883 t) are provided in the technical dossier for environmental reporting.

Software & Data Management

While standalone operation requires no software, the RS232 interface enables bidirectional communication with third-party LabVIEW, MATLAB, or Python-based control scripts using ASCII command protocols (e.g., “IN_PV?” for process value readback). Julabo’s optional ComSoft 5 software (sold separately) provides full remote configuration, multi-step ramp/soak programming, real-time graphing, and CSV export—supporting 21 CFR Part 11-compliant electronic signatures, audit trails, and user access levels when deployed on validated Windows OS platforms. All temperature logs include timestamps, operator IDs, and event markers (e.g., “Alarm: Low Level Triggered”), satisfying data integrity expectations under ALCOA+ principles.

Applications

• Precise thermal control of jacketed glass reactors during exothermic/endothermic synthesis (–40 °C to +150 °C).
• Viscosity measurement with rotational rheometers requiring sub-0.02 °C bath stability over extended dwell periods.
• Calibration of temperature-sensitive optical instruments (e.g., Abbe refractometers, UV-Vis spectrophotometers) across their full operational range.
• Accelerated stability testing per ICH Q1A(R2) guidelines, where controlled thermal stress profiles must be reproducibly maintained for weeks.
• Material testing of polymers and composites under dynamic thermal cycling between –50 °C and +100 °C.

FAQ

What is the minimum recommended fluid volume for stable operation?
The FPW50-HE requires ≥6 L of compatible heat transfer fluid to ensure proper pump priming, sensor immersion, and thermal mass for stability—especially below –20 °C.
Can the unit operate continuously at +200 °C?
Yes, provided a thermally stable silicone oil (e.g., Dow Corning 200 Fluid) is used and ambient temperature remains ≤35 °C; continuous operation above 180 °C reduces compressor service interval by ~30% per ISO 15243.
Is external temperature control possible without modifying the internal PID parameters?
Yes—the external Pt100 input operates in dedicated “External Sensor Mode”, overriding the internal bath sensor for primary control loop feedback without altering factory ICC tuning.
Does the FPW50-HE support Ethernet or USB connectivity?
No native Ethernet or USB; RS232 is standard, with Profibus DP as the only fieldbus option—Ethernet gateways require third-party protocol converters.
How often should the condenser coil be cleaned?
Under typical lab conditions (25 °C ambient, 40% RH), quarterly cleaning is sufficient; in dusty or high-humidity environments, monthly inspection is advised per Julabo Maintenance Bulletin MB-FPW-07.