JULABO CORIO CD-BT5 Transparent Circulating Heating Bath
| Brand | JULABO |
|---|---|
| Model | CD-BT5 |
| Origin | Germany |
| Bath Volume | 3.5–5 L |
| Temperature Range | +5 °C to +100 °C |
| Temperature Stability | ±0.03 °C |
| Display Resolution | 0.01 °C (9.99–99.99 °C), 0.1 °C (elsewhere) |
| Pump Flow Rate | 15 L/min |
| Max. Pressure | 0.35 bar |
| Bath Material | Polycarbonate |
| Safety Class | DIN 12876-1 Class I (FL) & Class III (FL) |
| Interface | USB |
| Protection Features | Overtemperature Cut-off, Low-Level Float Switch, ATC Self-Calibration |
Overview
The JULABO CORIO CD-BT5 is a transparent, open-bath circulating heating bath engineered for precise, stable temperature control in laboratory environments where direct sample immersion and external circulation are required simultaneously. Based on resistive heating and PID-controlled thermal regulation, the CD-BT5 maintains temperature uniformity across its polycarbonate bath chamber using a high-efficiency impeller pump and optimized fluid dynamics. Its design supports both internal thermostating—ideal for small-volume samples, calibration standards, or sensor immersion—and external recirculation via M16×1 ports for integration with jacketed reactors, viscometers, or custom thermal manifolds. With an operational range from +5 °C to +100 °C and stability of ±0.03 °C at setpoint, the CD-BT5 meets stringent requirements for applications demanding reproducible thermal conditioning without active cooling.
Key Features
- PID1 advanced temperature control algorithm ensuring rapid settling and minimal overshoot across the full operating range
- High-brightness white LED display with four-digit resolution: 0.01 °C between 9.99 °C and 99.99 °C; 0.1 °C outside this interval
- Dual safety certification per DIN 12876-1: Class I (FL) for non-flammable fluids (e.g., water, aqueous glycol) and Class III (FL) for flammable media (e.g., silicone oils, low-flash-point solvents)
- Integrated float-level sensor triggering audible/visual alarm and automatic power cutoff upon low liquid detection—preventing dry-run damage
- ATC (Automatic Temperature Calibration) function enabling user-performed single-point calibration at any temperature within range, traceable to reference standards
- Adjustable dual-path circulation: independent control of internal bath convection and external flow rate ratio, supporting flexible system integration
- USB interface compliant with standard CDC ACM protocols for real-time data logging (temperature, status flags) and remote parameter setting via PC software
Sample Compatibility & Compliance
The CD-BT5 accommodates samples up to 15 cm × 15 cm × 15 cm directly immersed in its 3.5–5 L polycarbonate bath. Its chemical-resistant construction resists hydrolysis, UV degradation, and mild organic exposure—making it suitable for aqueous buffers, ethylene glycol/water mixtures, and select silicone-based heat transfer fluids. All electrical and thermal safety mechanisms conform to EN 61010-1:2019 and carry CE marking. The dual DIN 12876-1 classification permits use with both non-flammable and flammable liquids under defined ventilation and containment conditions. While not intrinsically safe for hazardous area installation, the unit complies with general laboratory risk assessments per ISO/IEC 17025:2017 Annex A.3 for equipment qualification in accredited testing labs.
Software & Data Management
Data acquisition and device control are supported via JULABO’s proprietary LabSoft software (Windows-compatible), accessible through the rear-panel USB-B port. Logged parameters include real-time bath temperature, setpoint, pump status, alarm events (e.g., “Low Level”, “Overtemp”), and timestamped calibration records. Export formats include CSV and XML, compatible with LIMS platforms and electronic lab notebooks (ELNs). Audit trails meet GLP/GMP expectations for instrument use documentation, including operator ID tagging (via optional Windows login integration) and immutable event logging. Firmware updates are delivered through signed binary packages verified via SHA-256 checksums, ensuring integrity during maintenance cycles.
Applications
- Thermal equilibration of reference standards prior to metrological verification (e.g., thermometer calibration per ASTM E77)
- Controlled pre-conditioning of polymeric specimens for tensile, impact, or DMA testing (ISO 6721, ASTM D638)
- Stabilization of optical components, photodetectors, or laser diodes during spectral characterization
- Temperature-dependent enzymatic assays requiring strict thermal consistency over extended durations
- Supporting external devices such as rotational rheometers, differential scanning calorimeters (DSC), or flow-through UV-Vis cells
- Material compatibility screening under accelerated thermal aging protocols (e.g., IPC-TM-650 2.6.25)
FAQ
Can the CD-BT5 be used with flammable heat transfer fluids?
Yes—when configured per DIN 12876-1 Class III (FL) requirements, including proper ventilation, grounding, and exclusion of ignition sources. Refer to the Fluid Compatibility Matrix in the Operation Manual before selecting media.
Is external cooling capability available?
No—the CD-BT5 is a heating-only system. For combined heating/cooling, consider the JULABO F26 or PRESTO series with integrated refrigeration.
Does the USB interface support real-time control via third-party software?
Yes—using the documented ASCII command protocol (available in the Developer Guide), LabVIEW, Python (pySerial), or MATLAB can initiate setpoint changes, query status, and trigger data capture.
What is the maximum allowable ambient temperature for continuous operation?
40 °C, as specified in IEC 60068-2-1. Above this, thermal derating may reduce stability performance and shorten pump service life.
How often should ATC calibration be performed?
Annually under routine use, or after any mechanical shock, fluid change, or observed drift exceeding ±0.02 °C against a NIST-traceable reference thermometer.
