DC-15B Super Constant-Temperature Water & Oil Bath Circulator
| Capacity | 20 L |
|---|---|
| Flow Rate | 10 L/min |
| Input Voltage | 220 V AC |
| Heating Power | 3 kW |
| Temperature Range | Ambient to 200 °C (upgradable to 300 °C) |
| Circulation Type | Internal Recirculation |
| Origin | Zhejiang, China |
| Equipment Type | Laboratory Constant-Temperature Bath |
Overview
The DC-15B Super Constant-Temperature Water & Oil Bath Circulator is a precision-engineered thermal management system designed for stable, repeatable temperature control in laboratory and pilot-scale applications. Operating on the principle of forced convection via an integrated internal circulation pump, it maintains uniform thermal distribution across its 20-liter working volume—whether filled with water, silicone oil, or other compatible heat-transfer fluids. Unlike passive baths, the DC-15B actively regulates temperature through a PID-controlled heating element and high-sensitivity platinum resistance thermometer (PT100), enabling accurate setpoint stability within ±0.1 °C under steady-state conditions. Its dual-capability design supports both aqueous and high-temperature oil-based operation, making it suitable for applications ranging from enzymatic reaction incubation at 37 °C to polymerization studies requiring sustained 180–250 °C environments. The unit is engineered for integration with external equipment—including jacketed reactors, condensers, and spectroscopic cells—via standard 1/2″ NPT or G1/2 threaded ports.
Key Features
- Compact benchtop footprint (W×D×H ≈ 400 × 350 × 500 mm) optimized for space-constrained laboratories
- Robust stainless-steel tank construction with anti-corrosion coating for extended service life with water, glycol mixtures, and synthetic heat-transfer oils
- Digital LED interface with intuitive menu navigation, real-time temperature display, and programmable ramp-soak profiles
- Over-temperature cut-off and dry-run protection circuitry compliant with IEC 61010-1 safety standards
- Low-noise centrifugal circulation pump delivering consistent 10 L/min flow at ≤0.3 bar backpressure, minimizing thermal lag during dynamic load changes
- Thermal insulation layer reducing ambient heat loss by >40%, contributing to energy efficiency during prolonged operation
Sample Compatibility & Compliance
The DC-15B accommodates a wide range of fluid media, including deionized water, 50/50 ethylene glycol–water blends, methyl silicone oil (e.g., Dow Corning 200 Fluid), and polydimethylsiloxane-based heat-transfer liquids. It is not intended for use with flammable solvents (e.g., acetone, ethanol, hexane) or corrosive acids/bases without third-party validation. The device conforms to CE marking requirements for electromagnetic compatibility (EMC Directive 2014/30/EU) and low-voltage safety (LVD Directive 2014/35/EU). While not certified for GMP or GLP environments out-of-the-box, its temperature logging capability (via optional RS485/Modbus RTU output) supports audit-ready data capture when paired with validated SCADA or LIMS systems meeting FDA 21 CFR Part 11 electronic record requirements.
Software & Data Management
The DC-15B operates as a standalone instrument with no proprietary software dependency. All configuration and monitoring occur locally via the front-panel interface. For advanced integration, an optional communication module enables Modbus RTU protocol over RS485, allowing bidirectional control and real-time parameter readout—including actual temperature, setpoint, heater status, and fault codes—into LabVIEW, MATLAB, or custom Python-based lab automation frameworks. Timestamped temperature logs can be exported manually via USB flash drive (FAT32 formatted) in CSV format, supporting traceability per ISO/IEC 17025 Clause 7.7 on result reporting. No cloud connectivity or vendor-hosted platforms are involved, preserving data sovereignty and network security.
Applications
- Temperature conditioning of double-walled glass reactors and pilot-scale stirred tanks
- Calibration of thermocouples, RTDs, and infrared pyrometers against NIST-traceable references
- Viscosity measurement support for rotational rheometers requiring bath-stabilized sample cells
- Controlled-rate heating/cooling cycles in material science studies (e.g., DSC pre-conditioning, TGA sample staging)
- Stabilization of optical components in interferometry and laser alignment setups where thermal drift must remain below 50 mK/hour
- Seed crystal growth experiments requiring precise thermal gradients across multi-zone crystallization vessels
FAQ
Can the DC-15B operate continuously at 200 °C using water as the medium?
No. Water boils at 100 °C at atmospheric pressure; operation above this temperature requires silicone oil or another high-boiling-point heat-transfer fluid.
Is external recirculation possible with this model?
The DC-15B features internal recirculation only. External loop integration would require modification and is not supported under warranty.
What is the typical warm-up time from ambient to 150 °C with silicone oil?
Approximately 45–60 minutes, depending on fill level, ambient temperature, and oil viscosity grade.
Does the unit include a calibration certificate?
Factory calibration is performed using a NIST-traceable reference thermometer; a basic calibration report is provided. ISO/IEC 17025-accredited certification is available upon request at additional cost.
How often should the circulating fluid be replaced?
For silicone oil used continuously at >150 °C, replacement is recommended every 6–12 months based on visual inspection (discoloration, sludge formation) and viscosity drift exceeding ±10% of initial specification.
