Scientz DC-3006 Low-Temperature Circulating Bath (Heating & Cooling)

Overview

The Scientz DC-3006 Low-Temperature Circulating Bath is an engineered thermal management system designed for precise, stable, and reproducible temperature control across demanding laboratory and industrial applications. Utilizing a dual-mode thermoelectric and mechanical refrigeration architecture—integrated with high-efficiency heating elements—the DC-3006 delivers accurate thermal regulation from −30 °C to +100 °C within a 260 × 200 × 140 mm stainless-steel bath chamber. Its core operational principle relies on closed-loop PID-controlled circulation of heat-transfer fluid (water or silicone oil), enabling both internal bath homogenization and external temperature conditioning via adjustable flow-rate pump output. The unit employs an environmentally compliant refrigerant (R-134a or equivalent low-GWP alternative) and features a hermetically sealed, low-noise Secop (Danfoss) compressor—ensuring long-term reliability, minimal acoustic emission (<45 dB(A)), and compliance with EU F-Gas Regulation (EU No 517/2014). As a primary or auxiliary thermal source, the DC-3006 supports calibration workflows, reaction kinetics studies, material property testing, and equipment cooling in environments requiring traceable, GLP-aligned thermal stability.

Key Features

• 7-inch capacitive touchscreen interface with ergonomic tilt design—enabling clear parameter visibility at viewing angles up to 3 meters; displays real-time bath temperature, setpoint, elapsed time, pump status, and alarm history.
• PID-based microprocessor temperature controller with adaptive tuning algorithms—achieving ±0.1 °C temperature stability under static load and ≤±0.3 °C uniformity across the bath volume (ASTM E1137/E1137M).
• Dual-circulation architecture: switchable internal recirculation (for bath homogeneity) and external loop mode (max. 12 L/min @ 0.3 MPa)—with continuously adjustable flow rate (0–100%) and integrated pressure monitoring.
• Intelligent power recovery logic: retains all user-defined parameters—including setpoint, timer, circulation mode, and auto-start configuration—after grid interruption; configurable “Auto-On” or “Standby” behavior upon re-powering.
• Comprehensive safety suite: compressor overheat and overload protection, dry-run detection, high-temperature cut-off (110 °C), low-level fluid alarm, and over-pressure relief valve (set at 0.45 MPa).
• Low-vibration, corrosion-resistant construction: 304 stainless-steel bath tank, insulated housing, and vibration-damped mounting for integration with sensitive instrumentation (e.g., FTIR spectrometers, viscometers, or laser interferometers).

Sample Compatibility & Compliance

The DC-3006 accommodates aqueous solutions, ethylene glycol/water mixtures, and silicone oils (up to 100 cSt viscosity), supporting compatibility with glass, PTFE, stainless-steel, and borosilicate sample vessels. It meets IEC 61010-1:2010 safety requirements for laboratory electrical equipment and conforms to electromagnetic compatibility standards per EN 61326-1:2013. For regulated environments, its firmware supports audit-trail-capable operation when paired with Scientz’s optional LabLink Pro software (21 CFR Part 11 compliant with electronic signatures, role-based access, and immutable data logging). Validation documentation—including IQ/OQ templates aligned with ISO/IEC 17025 and ASTM D1500—can be supplied upon request for GMP, pharmaceutical QC, or metrology lab deployment.

Software & Data Management

While standalone operation requires no PC, the DC-3006 is fully compatible with Scientz LabLink Pro v3.2—a Windows-based platform enabling remote monitoring, multi-unit synchronization, scheduled ramp/soak profiles, and automated CSV/TXT export. All temperature logs include timestamped metadata (UTC), sensor ID, and environmental context tags. Data integrity safeguards include cyclic redundancy checksums (CRC-32), write-once archival mode, and encrypted local storage (AES-256). Optional RS485 (Modbus RTU) and Ethernet (TCP/IP) interfaces support integration into SCADA or LIMS ecosystems—facilitating centralized thermal process oversight across multi-instrument laboratories.

Applications

• Condenser cooling for rotary evaporators (e.g., maintaining 5 °C coolant supply during solvent removal at 40 °C bath temperature)
• Temperature stabilization of non-contact ultrasonic disruptors (e.g., sonication of protein complexes at 4 °C ±0.2 °C)
• Exothermic/endothermic reaction control in jacketed reactors and calorimetry cells
• Thermal preconditioning of biological samples (e.g., enzyme assays, cell culture media equilibration, cryopreservation protocols)
• Calibration of thermocouples, RTDs, and infrared pyrometers against NIST-traceable references
• Thermal stress testing of semiconductor packages, PCB assemblies, and optoelectronic components

FAQ

What is the maximum allowable viscosity of heat-transfer fluid for external circulation?
The DC-3006 supports fluids up to 100 cSt at operating temperature; higher viscosities require derated flow rates and may necessitate optional high-torque pump modules.
Does the unit support programmable temperature ramps?
Yes—via LabLink Pro software, users can define multi-segment ramp/soak profiles with dwell times, rate limits (0.1–10 °C/min), and conditional triggers (e.g., pause on external signal input).
Is the bath tank drainable without disassembly?
Yes—an integrated bottom-mounted quick-release drain valve enables full fluid evacuation while preserving calibration integrity.
Can the DC-3006 be integrated into a building management system (BMS)?
Via optional Modbus TCP gateway, it provides real-time status, setpoint, and fault codes to BACnet/IP or LonWorks networks using standard register mapping.
What validation documentation is provided with the instrument?
Factory-issued Certificate of Conformance, as-built drawings, and electronic copies of IQ/OQ protocols compliant with ISO/IEC 17025 Annex A.2 are included; PQ support available upon site-specific commissioning engagement.