Julabo DYNEO DD-Series Programmable Heating Circulating Bath
| Brand | Julabo |
|---|---|
| Origin | Germany |
| Model Series | DD-201F, DD-200F, DD-300F, DD-601F, DD-600F, DD-900F, DD-1000F, DD-1001F |
| Temperature Range | −20 °C to +200 °C (up to −50 °C in select models) |
| Temperature Stability | ±0.01 °C |
| Bath Volume | 3–56 L |
| Heating Power | up to 2 kW |
| Refrigeration Power (in ethanol) | 0.02–1.0 kW (model- and temperature-dependent) |
| Pump Flow Rate | 8–27 L/min |
| Max. Pump Pressure | 0.7 bar |
| Control Interface | 3.5″ TFT color display with rotary encoder |
| Compliance | DIN 12876-1 Class III (FL) for flammable media |
| Cooling Method | Air-cooled, front-intake/rear-exhaust design |
| Refrigerant | R134a or R449A (low-GWP) |
| Safety Certification | Integrated overtemperature, low-level, and dry-run protection |
Overview
The Julabo DYNEO DD-Series is a high-precision, programmable heating circulating bath engineered for demanding laboratory and industrial applications requiring exceptional thermal stability, flexible external temperature control, and safe operation with flammable heat transfer media. Based on advanced PID3 control architecture and Julabo’s proprietary TCF (Temperature Control Flexibility) and ACC (Advanced Compressor Control) technologies, the DD-Series delivers sub-0.01 °C temperature stability across its full operating range—from −50 °C to +200 °C—while enabling precise ramp-and-soak programming, multi-point calibration, and real-time adaptive power modulation. Unlike conventional baths, the DD-Series supports both internal bath temperature regulation and external process temperature feedback via optional PT100 sensor input, making it suitable for jacketed reactor control, material testing fixtures, and calorimetric setups where thermal inertia and system coupling must be actively managed. Its air-cooled, front-intake/rear-exhaust compressor layout allows for dense instrument rack integration without side clearance constraints—a critical advantage in space-constrained GLP/GMP labs and QC environments.
Key Features
- Intuitive flywheel rotary encoder interface with 3.5″ high-resolution TFT color display supporting multi-language operation (English, Chinese, German, French, Spanish)
- DIN 12876-1 Class III (FL) certification for safe use with flammable liquids such as ethanol, acetone, and silicone oils
- ATC3 multi-point temperature calibration system (1-, 2-, or 3-point) traceable to NIST standards, ensuring long-term accuracy and audit readiness
- TCF technology enables independent tuning of internal bath and external process temperature curves, including differential limit control and power ceiling assignment
- ACC technology permits compressor startup at elevated ambient temperatures (up to +40 °C), eliminating warm-up delays and improving thermal response during rapid cooldown sequences
- Magnetic-access cold plate cover with multi-hole filtration ensures robust dust resistance and tool-free condenser maintenance
- USB data logging (via FAT32-formatted USB drive) and BLACK BOX fault diagnostics with timestamped event history for root-cause analysis and regulatory documentation
- Double-walled stainless steel bath with high-efficiency insulation—surface temperature remains below 45 °C even at 200 °C setpoint, meeting IEC 61010-1 touch-safety requirements
Sample Compatibility & Compliance
The DYNEO DD-Series accommodates a broad spectrum of heat transfer fluids—including water, glycol/water mixtures, silicone oils, and certified flammable solvents—within viscosity limits of ≤50 cSt. All models comply with DIN 12876-1 Class III (FL) safety classification, permitting operation with flash point <60 °C liquids under controlled ventilation conditions. The bath’s M16×1 pump port (with included 8 mm and 12 mm quick-connect adapters) ensures leak-tight integration with external systems up to 0.7 bar backpressure. For regulated environments, the device supports 21 CFR Part 11-compliant electronic records when paired with Julabo’s optional LabSoft software (audit trail, user access levels, electronic signatures). Electrical safety meets IEC 61010-1 Ed. 3; electromagnetic compatibility conforms to IEC 61326-1 (industrial environment). Optional RS232 or analog I/O modules enable seamless integration into SCADA, LIMS, or PLC-based process control networks.
Software & Data Management
While the DD-Series operates autonomously via its embedded controller, Julabo’s LabSoft software (Windows-based, optional license) extends functionality for GxP-aligned workflows. LabSoft provides full remote monitoring, multi-device synchronization, automated report generation (PDF/CSV), and compliance-ready audit trails—including operator ID, parameter changes, alarm events, and calibration logs. USB data export captures time-stamped temperature, flow rate, power consumption, and error codes at user-defined intervals (1 s to 60 min resolution). The built-in BLACK BOX continuously buffers the last 72 hours of operational data—even during power loss—ensuring continuity for failure analysis. Firmware updates are performed via USB, with version verification and rollback capability to maintain configuration integrity across validation cycles.
Applications
- Calibration of thermometers, RTDs, and thermocouples per ISO/IEC 17025 requirements
- Temperature conditioning of viscometers, rheometers, and DSC sample stages
- Control of jacketed glass reactors and pilot-scale bioreactors in pharmaceutical development
- Thermal cycling of electronic components and polymer specimens per ASTM D696 and ISO 11359
- Stability testing of active pharmaceutical ingredients (APIs) and formulations under ICH Q1 guidelines
- Material property measurement (CTE, thermal conductivity) requiring ultra-stable boundary conditions
- Environmental simulation for automotive and aerospace component qualification (e.g., SAE J2412, MIL-STD-810)
FAQ
What is the maximum allowable viscosity of heat transfer fluid?
The DD-Series is rated for fluids with kinematic viscosity ≤50 cSt at operating temperature. Higher viscosities may impair pump efficiency and thermal uniformity.
Can the bath control an external process using a PT100 sensor?
Yes—models equipped with optional analog I/O or RS232 interfaces support external PT100 input for closed-loop control of jacketed vessels, chillers, or test chambers.
Is DIN 12876-1 Class III (FL) certification valid for all models?
Yes—all DD-Series units carry full Class III (FL) certification, permitting use with flammable media when installed per manufacturer-specified ventilation and grounding protocols.
How does ACC technology improve cooling performance?
ACC modulates compressor start-up torque and refrigerant flow to enable reliable operation at ambient temperatures up to +40 °C, reducing cooldown time by up to 40% compared to conventional fixed-speed compressors.
What data security features support 21 CFR Part 11 compliance?
When used with LabSoft, the system provides role-based access control, electronic signatures, immutable audit trails, and automatic backup—meeting all technical requirements for electronic records in FDA-regulated environments.
