Julabo HighTech Series Professional Heating Circulators

Overview

The Julabo HighTech Series Professional Heating Circulators are precision-engineered temperature control systems designed for demanding laboratory and industrial applications requiring stable, reproducible thermal environments. Based on resistive heating and forced convection circulation, these units deliver highly accurate and uniform temperature distribution across internal baths and externally connected equipment. Engineered for continuous operation with robust stainless-steel construction and advanced thermal insulation, the HighTech series supports both direct sample immersion and remote temperature regulation of peripheral instrumentation—including jacketed reactors, viscometers, chromatography columns, polarimeters, electrophoresis apparatus, and spectrophotometers. The system’s core architecture integrates high-efficiency heating elements, a variable-speed Smart Pump, and ICC (Intelligent Control Circuit) temperature regulation—enabling rapid thermal response while maintaining exceptional stability at ±0.01°C over extended periods.

Key Features

• ICC Intelligent Temperature Control Technology: Delivers high-resolution thermal regulation without requiring manual self-diagnosis or recalibration under standard operating conditions.
• ATC3 User-Adjustable Calibration: Enables three-point temperature calibration using external PT100 reference sensors—supporting traceable, in-house verification per ISO/IEC 17025 guidelines.
• Smart Pump System: Dynamically adjusts pump pressure and flow rate based on bath fluid viscosity and system backpressure—ensuring consistent circulation performance across water, silicone oil, and heat-transfer fluids.
• VFD Backlit LCD Display: Simultaneously shows setpoint, internal bath temperature, and external sensor temperature; displays real-time operational parameters including heater status, pump power level (%), liquid level, output voltage, and heating power consumption.
• Dual-Limit Safety Architecture: Independent high-temperature and low-temperature cut-off thresholds prevent thermal excursions; configurable C-temp alarm triggers automatic shutdown and records peak temperature at fault event.
• Low-Level Pre-Alarm Function: Alerts users when fluid volume falls below operational minimum—allowing continued safe operation while prompting timely refilling.
• TCF (Thermal Control Flexibility): Supports differential temperature control between internal bath and external load, dynamic ramp/soak programming, and user-defined thermal limits for process-critical workflows.
• DIN 12876-1 Class III (FL) Certification: Approved for use with flammable heat-transfer media such as silicone oils and glycols—meeting stringent European safety requirements for laboratory thermal equipment.

Sample Compatibility & Compliance

The HighTech series accommodates a broad range of heat-transfer media—from deionized water and aqueous glycol mixtures to high-boiling-point silicone oils (up to 300°C). Its Class III (FL) certification ensures safe operation with combustible liquids under controlled ventilation conditions. All models comply with IEC 61010-1 for electrical safety in laboratory environments and meet CE marking requirements for EMC and Low Voltage Directive conformity. For regulated environments, optional RS232/RS485 interfaces support audit-ready data logging when integrated with validated software platforms compliant with FDA 21 CFR Part 11 and GLP/GMP documentation standards.

Software & Data Management

Standard serial communication (RS232/RS485) enables seamless integration with LabVIEW, MATLAB, or custom SCADA systems. Optional Profibus DP modules allow direct PLC-level orchestration in automated manufacturing or QC workflows. The built-in 6×60 programmable temperature profile memory supports multi-step ramp-hold sequences, while analog I/O modules (0–10 V / 4–20 mA) facilitate analog feedback control loops in closed-loop process systems. All temperature logs—including timestamps, setpoints, actual values, alarms, and pump/heater states—can be exported in CSV format for long-term archiving and trend analysis.

Applications

• Calibration and validation of temperature-sensitive analytical instruments (e.g., HPLC column ovens, rheometers, DSC sample holders)
• Thermal conditioning of polymer melts, resins, and adhesives prior to rheological or mechanical testing
• Precise temperature staging in enzymatic assays, protein folding studies, and cell culture incubation support systems
• External temperature control of jacketed glass reactors, distillation setups, and crystallization vessels
• Stabilization of optical components in interferometry, ellipsometry, and laser spectroscopy platforms
• Accelerated aging tests per ASTM D573, ISO 188, and IEC 60068-2-11 standards

FAQ

Can the HighTech circulator operate with flammable heat-transfer fluids?
Yes—models certified to DIN 12876-1 Class III (FL) are specifically engineered for use with flammable oils and glycols under appropriate fume hood or ventilated cabinet conditions.
Is external temperature control possible without modifying the bath setup?
Yes—the optional external PT100 input allows direct measurement and regulation of an external system’s temperature, decoupling control logic from internal bath conditions.
How is temperature calibration performed in routine lab use?
Using the ATC3 function, users can perform three-point calibration against NIST-traceable reference sensors at user-selected temperatures—no service technician required.
What safety protections prevent overheating during unattended operation?
Independent hardware-based high-temperature cutoff, C-temp alarm with memory, low-fluid-level warning, and thermal fuse redundancy ensure fail-safe operation.
Are digital communication protocols compatible with LIMS or ELN systems?
Yes—RS232/RS485 outputs support ASCII command sets compatible with most laboratory informatics platforms; optional Profibus and analog I/O modules extend interoperability into industrial automation infrastructures.