JULABO SE-6 High-Temperature Circulating Bath

Overview

The JULABO SE-6 High-Temperature Circulating Bath is a precision-engineered thermal management system designed for demanding laboratory and industrial applications requiring stable, reproducible heating across an extended temperature range of +5 °C to +300 °C. Based on Julabo’s proven ICC (Intelligent Current Control) temperature regulation architecture, the SE-6 employs a high-efficiency resistive heating element coupled with a dynamically adaptive Smart Pump system to maintain thermal stability within ±0.01 °C — a performance benchmark essential for calibration-critical workflows, material property characterization, and external system temperature control. Unlike basic immersion heaters or static baths, the SE-6 integrates closed-loop circulation capability (both internal bath homogenization and external loop supply), enabling precise thermal conditioning of instruments such as jacketed reactors, viscometers, chromatography columns, polarimeters, electrophoresis units, and spectrophotometers. Its stainless-steel bath chamber and DIN 12876-1 Class III (FL) certification confirm full compatibility with flammable heat-transfer media—including silicone oils and aromatic hydrocarbons—under controlled laboratory conditions.

Key Features

• ICC Intelligent Current Control algorithm ensures rapid thermal response and long-term stability without manual tuning or self-diagnostic routines.
• VFD display with triple simultaneous readout: setpoint, internal bath temperature, and external PT100 sensor input — all visible at distances up to 3 meters.
• ATC3 (Advanced Temperature Calibration) function allows user-performed 3-point calibration traceable to NIST-traceable references, supporting ISO/IEC 17025-compliant lab practices.
• Smart Pump technology automatically adjusts impeller speed and pressure output in real time to compensate for changes in fluid viscosity, ensuring consistent flow rates across temperature ramps.
• Dual-stage overtemperature protection: adjustable C-temp alarm threshold plus hard-limit cutoff; both trigger audible/visual alerts and immediate heater deactivation while logging the fault temperature.
• TCF (Temperature Control Function) logic enables dynamic differential control — users define maximum allowable ΔT between internal and external sensor readings, preventing thermal lag-induced deviations in remote systems.
• Integrated cooling coil permits passive heat dissipation during ambient-temperature operation or rapid cooldown phases, reducing reliance on auxiliary chillers.
• RS232 interface supports bidirectional communication with LabVIEW, MATLAB, or custom SCADA environments; optional RS485 and Profibus modules available for integration into automated manufacturing or GLP/GMP-controlled facilities.

Sample Compatibility & Compliance

The SE-6 accommodates direct sample immersion for small-volume thermal equilibration (e.g., cuvettes, capillary tubes, calibration standards) and provides robust external circulation for jacketed vessels up to 50 L volume. Its 6 L stainless-steel reservoir features a 13 × 15 cm opening and 20 cm depth, optimized for compatibility with standard tubing (8 mm and 12 mm ID) via dual M16×1 pump ports. The unit complies fully with DIN 12876-1 Class III (FL) safety requirements for use with flammable liquids, including flash point verification protocols and sealed electrical compartment design. It meets electromagnetic compatibility standards per EN 61326-1 and operates safely within ambient conditions of 5–40 °C and ≤80% non-condensing humidity. All firmware and hardware configurations support audit-ready operation under FDA 21 CFR Part 11 when paired with validated software platforms.

Software & Data Management

While the SE-6 operates autonomously via front-panel controls, its RS232 port enables full remote command execution (e.g., SET TEMP, START/STOP, QUERY STATUS) and real-time data streaming (temperature, power %, pump status, alarms). When integrated with JULABO’s optional CombiControl software or third-party DAQ systems, users can log timestamped datasets at configurable intervals (100 ms to 60 s), generate CSV exports for statistical process control (SPC), and embed metadata (operator ID, experiment ID, calibration date) per GLP documentation requirements. Firmware updates are delivered via serial upload and include version-locking and checksum validation to ensure integrity in regulated environments.

Applications

• Calibration of temperature-sensitive analytical instruments (e.g., UV-Vis spectrophotometers, refractometers, densitometers).
• Thermal preconditioning of polymer melts, resins, and thermosets prior to rheological or mechanical testing.
• Stabilized column oven environments for HPLC and GC systems operating above ambient.
• Controlled-temperature feed preheating in catalytic reaction studies and kinetic modeling.
• Long-duration stability testing of pharmaceutical formulations under ICH Q1A-relevant conditions.
• Reference bath for thermometer calibration labs accredited to ISO/IEC 17025.

FAQ

Can the SE-6 be used with silicone oil or other flammable heat-transfer fluids?
Yes — its DIN 12876-1 Class III (FL) certification explicitly permits safe operation with flammable liquids having flash points ≥60 °C when installed per manufacturer-specified ventilation and containment guidelines.
Does the SE-6 support cooling functions?
No — it is a heating-only system. However, the integrated cooling coil facilitates passive heat rejection at near-ambient temperatures and accelerates cooldown after high-temperature runs.
Is external temperature feedback mandatory for accurate control?
No — internal PID control maintains ±0.01 °C stability using the built-in Pt100 sensor. External PT100 input is optional and recommended only when controlling remote systems where bath temperature ≠ process temperature.
What is the maximum external loop pressure the pump can sustain?
The Smart Pump delivers up to 0.7 bar at minimum flow (2 L/min) and maintains ≥0.4 bar across the full 2–26 L/min range, sufficient for most jacketed reactor and column heater applications.
How often should ATC3 calibration be performed?
Julabo recommends annual calibration verification against traceable reference standards; more frequent checks are advised after mechanical shock, fluid replacement, or if stability drift exceeds ±0.005 °C over 24 h.