SCIENTZ DC-0520 Low-Temperature Constant-Temperature Bath
| Brand | SCIENTZ |
|---|---|
| Origin | Zhejiang, China |
| Model | DC-0520 |
| Bath Volume | 20 L |
| Temperature Range | −5 to 100 °C |
| Temperature Stability | ±0.1 °C |
| Control Mode | PID with Microprocessor |
| Display | 7-inch Tilted Touchscreen |
| Pump Flow Rate | 0–15 L/min (adjustable) |
| Maximum Pump Pressure | 0.45 bar |
| Refrigeration Capacity (at 25 °C) | 1.25 kW |
| Heating Power | 3.6 kW |
| Total Power Consumption | 3.6 kW/h |
| External Dimensions (L×W×H) | 455×430×935 mm |
| Safety Features | Compressor Overheat & Overload Protection |
| Environmental Refrigerant | R134a or equivalent HFC-based refrigerant compliant with EU F-Gas Regulation |
Overview
The SCIENTZ DC-0520 Low-Temperature Constant-Temperature Bath is a precision-engineered thermal management system designed for laboratory environments requiring stable, programmable liquid temperature control across a broad operational range (−5 °C to +100 °C). Utilizing a closed-loop refrigeration circuit with an imported hermetic compressor (Secop, Germany), the unit delivers consistent thermal output without external recirculation infrastructure—making it suitable both as a standalone bath and as a primary temperature source for external devices such as rotary evaporator condensers, ultrasonic probe systems, and reaction jackets. Its microprocessor-based PID controller ensures high reproducibility in temperature maintenance, with stability maintained within ±0.1 °C under steady-state conditions—a performance benchmark aligned with ISO/IEC 17025-compliant calibration workflows and ASTM E2877-22 guidelines for thermal stability verification in analytical instrumentation.
Key Features
- High-efficiency refrigeration system using environmentally compliant R134a refrigerant, meeting EU Regulation (EU) No 517/2014 requirements for low-global-warming-potential (GWP) alternatives.
- 7-inch tilted capacitive touchscreen interface with intuitive menu navigation, real-time display of setpoint/actual temperature, elapsed time, and pump status—optimized for visibility at benchtop working distance.
- Programmable timer function: automatic shutdown upon reaching user-defined duration; supports unattended overnight operation with configurable power-on behavior (auto-start or standby mode after mains recovery).
- Adjustable circulation pump (0–15 L/min flow rate, max 0.45 bar pressure) enabling flexible integration with external heat exchangers or jacketed reactors—pump direction and speed are software-controllable via touchscreen.
- Dual-mode thermal regulation: simultaneous heating and cooling capacity allows rapid temperature ramping and precise hold points, critical for kinetic studies and thermal cycling protocols.
- Comprehensive safety architecture including compressor overheat protection, current overload cutoff, dry-run detection, and over-temperature alarm—fully documented in the CE-certified electrical safety report (EN 61010-1:2010+A1:2019).
Sample Compatibility & Compliance
The DC-0520 accommodates aqueous, ethylene glycol/water mixtures, silicone oils, and other non-corrosive heat-transfer fluids compatible with stainless-steel (SUS304) bath chamber construction. Its 20 L working volume (300 × 250 × 260 mm internal dimensions) supports immersion of standard laboratory vessels up to 200 mm in height. The unit conforms to key international standards for laboratory equipment: IEC 61010-1 (safety), IEC 61326-1 (EMC), and ISO 14001-aligned environmental design principles. While not certified for GMP manufacturing use per FDA 21 CFR Part 11, its audit-ready parameter logging (via optional RS485/Modbus RTU interface) supports GLP-compliant recordkeeping when integrated into validated lab information management systems (LIMS).
Software & Data Management
The embedded firmware supports local data logging of temperature profiles, pump status, and alarm events with timestamp resolution of 1 second. Logged data can be exported via USB flash drive in CSV format for post-processing in MATLAB, OriginLab, or Excel. Optional communication modules enable remote monitoring and control through SCIENTZ’s LabLink™ PC software (Windows 10/11 compatible), which provides real-time graphing, multi-channel synchronization, and export of .tdms files compatible with NI DIAdem. All configuration changes are retained in non-volatile memory—even during extended power outages—ensuring continuity in regulated environments where protocol integrity is mandatory.
Applications
- Condenser cooling for rotary evaporation systems operating under reduced pressure, maintaining solvent dew point below ambient to maximize recovery yield.
- Temperature stabilization of non-contact ultrasonic homogenizers during cell lysis or nanoparticle dispersion, preventing thermal degradation of sensitive biomolecules.
- Controlled exothermic/endothermic reaction monitoring in synthetic chemistry, where precise thermal boundary conditions directly influence selectivity and byproduct formation.
- Calibration of thermocouples, RTDs, and infrared pyrometers against NIST-traceable reference standards in metrology labs.
- Thermal stress testing of semiconductor packages and printed circuit boards (PCBs) during reliability qualification per JEDEC JESD22-A104.
- Biological sample conditioning for enzyme kinetics assays, microbial growth studies, and cryopreservation buffer equilibration prior to vitrification.
FAQ
Does the DC-0520 support external recirculation to a jacketed reactor?
Yes—the integrated adjustable pump (0–15 L/min, 0.45 bar max) is rated for continuous duty with external tubing up to 10 m in length and 12 mm ID. Recommended fluid viscosity limit: ≤50 cSt at operating temperature.
Is the temperature sensor calibrated traceable to national standards?
The factory-installed Pt100 sensor is calibrated at three points (0 °C, 25 °C, 70 °C) with uncertainty ≤±0.05 °C (k=2). Full calibration certificate (ISO/IEC 17025 accredited) is available as an optional add-on.
Can the unit operate continuously at −5 °C in a 30 °C ambient environment?
Yes—its refrigeration capacity (1.25 kW at 25 °C ambient) exceeds the combined heat load from ambient conduction and internal heater dissipation under worst-case conditions.
What maintenance intervals are recommended for long-term reliability?
Compressor oil inspection every 24 months; condenser coil cleaning every 6 months in dusty environments; annual verification of PID tuning parameters using SCIENTZ’s diagnostic mode.
Is there a version with Ethernet or Wi-Fi connectivity?
Not natively—but the RS485 port supports third-party gateways (e.g., Moxa EDS-G205A) for Modbus TCP conversion, enabling integration into building management systems (BMS) or centralized lab IoT platforms.
