Julabo CORIO CD-B5 Open-Circuit Heating Circulator

Overview

The Julabo CORIO CD-B5 is a precision-engineered open-circuit heating circulator designed for laboratory-grade thermal control of samples and external equipment. Operating on resistive heating with forced liquid circulation, the CD-B5 delivers stable, uniform temperature environments across a wide operational range—from +5 °C above ambient to +150 °C—without active cooling capability. Its stainless-steel bath construction, integrated immersion heater, and high-efficiency centrifugal pump enable both internal sample immersion and external closed-loop temperature regulation via flexible tubing connections. The system is optimized for applications requiring long-term thermal stability, reproducible setpoint adherence, and compatibility with sensitive analytical instrumentation where thermal drift must remain below ±0.03 °C.

Key Features

• Intelligent cascade control (ACC) combined with dual-stage PID1 algorithm ensures rapid thermal equilibration and minimal overshoot during dynamic load changes.
• ATC1 (Absolute Temperature Calibration) allows user-performed single-point calibration at any temperature within the operating range, maintaining traceable accuracy without external reference standards.
• High-brightness white LED display with adjustable contrast provides legible real-time monitoring from distances up to 3 meters—critical in multi-instrument lab environments.
• Corrosion-resistant 316 stainless-steel heating coil and bath chamber eliminate scaling, simplify cleaning, and extend service life when used with water, silicone oils, or glycol-based heat transfer fluids.
• Adjustable immersion depth (7.5–16.5 cm) accommodates varied bath geometries and ensures optimal thermal coupling between heater and working fluid.
• Swivel-mounted pump outlet enables 360° directional alignment for seamless integration with custom manifolds or inline accessories.
• Acoustically damped pump housing and vibration-isolated mounting reduce operational noise to <45 dB(A), meeting ISO 15710 recommendations for quiet laboratory infrastructure.
• Configurable power-on behavior: selectable auto-start mode (resumes last setpoint) or standby mode (requires manual activation).
• Comprehensive safety architecture includes dry-run protection (float-switch activated), overtemperature cutoff (independent hardware limiter), lockable IEC 60320 C14 inlet, and thermally fused controller electronics.
• Designed and manufactured in Germany to EN 61010-1 (safety) and EN 61326-1 (EMC) standards; certified DIN 12876-1 Class III (FL) for flammable liquid handling in open-bath configurations.

Sample Compatibility & Compliance

The CD-B5 supports direct immersion of small-volume samples (e.g., cuvettes, test tubes, sensor probes) as well as indirect temperature control of externally mounted devices including chromatography columns, viscometers, polarimeters, electrophoresis tanks, jacketed reactors, and spectrophotometer cells. It complies with DIN 12876-1 Class III (FL) requirements for use with flammable heat transfer media—enabling safe operation with silicone oils up to 150 °C. All electrical components conform to RoHS Directive 2011/65/EU and WEEE Directive 2012/19/EU. The device meets essential performance criteria for GLP-compliant thermal validation protocols and supports audit-ready documentation when paired with Julabo’s optional data logging modules.

Software & Data Management

While the CD-B5 operates autonomously via its front-panel interface, it features an RS232 communication port (standard) and optional USB/Ethernet interfaces for integration into centralized lab management systems. When connected to Julabo’s WinCT software (v4.0+), users can perform remote setpoint adjustment, real-time temperature logging at configurable intervals (1–60 s), export CSV-formatted datasets, and generate compliance reports aligned with FDA 21 CFR Part 11 requirements—including electronic signatures, audit trails, and user-access controls. Firmware updates preserve calibration history and maintain traceability across instrument lifecycles.

Applications

• Thermal conditioning of reference standards prior to metrological verification
• Stabilization of optical path lengths in interferometric and ellipsometric setups
• Temperature-dependent viscosity measurements using rotational or capillary viscometers
• Controlled heating of HPLC/GC column ovens and detector cells
• Pre-conditioning of polymer melts and thermoplastic specimens for mechanical testing
• Calibration of temperature-sensitive sensors (RTDs, thermistors, thermocouples)
• Supporting ASTM D341, ISO 3104, USP , and DIN 53019 rheological test methods

FAQ

Is the CD-B5 suitable for use with silicone oil at 150 °C?
Yes—the stainless-steel bath, sealed heating elements, and DIN 12876-1 Class III (FL) certification ensure safe, long-term operation with non-aqueous heat transfer fluids up to the maximum rated temperature.
Can the CD-B5 be integrated into a PLC-controlled process line?
Yes—via RS232 or optional analog 0–10 V / 4–20 mA I/O, enabling external setpoint modulation and status feedback in industrial automation frameworks.
Does the unit include overfill or spill containment features?
No built-in overflow tray is provided; however, the bath’s drain valve (G1/4″ BSP) and molded handgrips facilitate controlled fluid removal, and third-party drip trays compatible with 38 cm width are widely available.
What is the minimum recommended fluid volume for stable operation?
A minimum fill level corresponding to 7.5 cm immersion depth (~3.5 L for CD-B5) is required to engage the float switch and ensure full heater coverage—preventing thermal runaway and extending component life.
Are calibration certificates included with shipment?
Each unit ships with a factory-issued conformity statement referencing EN 61010 and DIN 12876-1; NIST-traceable calibration certificates are available as a paid option (Order Code: CAL-CD-Bx).