DC-0504B Precision Low-Temperature Circulating Bath
| Origin | Shanghai, China |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | DC-0504B |
| Pricing | Available Upon Request |
Overview
The DC-0504B Precision Low-Temperature Circulating Bath is an engineered laboratory temperature control system designed for stable, accurate, and repeatable thermal regulation in analytical, calibration, and material testing applications. It operates on a dual-compressor cascade refrigeration principle—enabling reliable operation down to –5 °C while maintaining precise setpoint stability across its full operating range of –5 °C to +95 °C. The unit integrates a high-stability Pt100 platinum resistance temperature sensor (DIN Class A tolerance) with a microprocessor-based PID controller, delivering temperature fluctuation of ±0.05 °C and display resolution of 0.1 °C. Its compact 4 L stainless-steel inner bath (304 grade), combined with high-efficiency polyurethane integral foaming insulation, minimizes thermal loss and supports energy-efficient long-duration operation. Unlike open-loop water baths or basic immersion chillers, the DC-0504B provides active circulation via an internal magnetic-drive pump, ensuring uniform thermal distribution—critical for applications requiring spatial temperature homogeneity, such as viscometer calibration, spectrophotometer thermostating, or reference standard equilibration.
Key Features
- Dual-compressor cascade refrigeration architecture optimized for rapid cooldown and sustained low-temperature performance at –5 °C
- Pt100 Class A temperature sensor with real-time feedback loop and auto-tuning PID algorithm for minimal overshoot and high setpoint fidelity
- Stainless-steel (304) inner tank and outer housing—corrosion-resistant, non-reactive, and compliant with GLP cleaning protocols
- Integrated circulation pump delivering 8 L/min flow rate, engineered for laminar, low-turbulence fluid motion to maintain horizontal and vertical thermal uniformity
- Ergonomic foldable side handles and vibration-dampened mounting—designed for benchtop stability and safe manual relocation
- High-density rigid polyurethane foam insulation applied via integral foaming process—reducing heat ingress by >40% compared to segmented insulation designs
- Intuitive LED interface with dual-display: setpoint temperature and real-time bath temperature, both resolved to 0.1 °C
Sample Compatibility & Compliance
The DC-0504B accommodates standard laboratory vessels—including glass beakers (up to Ø150 mm × 100 mm depth), probe-based sensors, and external jacketed reactors—via its 150 × 150 mm open-top configuration. It is compatible with water, ethanol/water mixtures, silicone oils (up to 50 cSt), and other non-corrosive heat-transfer fluids rated for operation between –5 °C and +95 °C. The unit meets IEC 61010-1:2010 safety requirements for electrical equipment for measurement, control, and laboratory use. Its temperature control architecture supports traceable calibration per ISO/IEC 17025 when used with accredited reference thermometers. While not FDA 21 CFR Part 11–certified out-of-the-box, audit-ready operational logs can be generated externally using RS232/USB data output for GLP/GMP environments.
Software & Data Management
The DC-0504B includes standard RS232 and USB-B communication interfaces supporting ASCII protocol for bidirectional command exchange. Optional PC software (provided free of charge) enables remote setpoint adjustment, real-time temperature logging at user-defined intervals (1–60 s), and CSV export for post-processing in MATLAB, Python, or LIMS platforms. Data records include timestamp, setpoint, measured temperature, and system status flags (e.g., compressor active, low-fluid warning). All logged data are stored locally on the host PC with configurable file naming and directory structure—supporting version-controlled documentation practices required under ISO 9001 and ASTM E2911–22 (Standard Guide for Temperature Calibration of Liquid-in-Glass Thermometers).
Applications
- Calibration of digital thermometers, RTDs, and thermocouples against NIST-traceable references
- Thermostating of UV-Vis spectrophotometer sample compartments and cuvette holders
- Temperature-controlled dissolution testing per USP and Ph. Eur. 2.9.3
- Stabilization of laser sources, interferometers, and optical benches requiring sub-0.1 °C thermal drift control
- Pre-conditioning of polymer samples prior to DSC or rheological analysis
- Supporting cold-stage microscopy setups where ambient thermal noise must be suppressed
FAQ
What is the minimum operating temperature of the DC-0504B?
The DC-0504B achieves a stable minimum operating temperature of –5 °C. For lower temperatures (e.g., –40 °C), consider the DC-4006 or DC-4015 models from the same series.
Is the bath compatible with organic solvents?
Yes—when used with ethanol/water mixtures or low-viscosity silicone oils (≤50 cSt); however, chlorinated or strongly acidic solvents are not recommended due to potential seal degradation.
Does the unit include over-temperature or low-level protection?
Yes—integrated safety cutoffs deactivate heating and refrigeration if temperature exceeds ±10 °C of setpoint or if fluid level falls below the pump intake threshold.
Can the circulation pump be bypassed for static bath operation?
No—the pump is non-removable and always active during operation; however, flow rate is fixed and optimized for uniformity—not adjustable.
What maintenance is required for long-term reliability?
Annual inspection of condenser coils, biannual verification of Pt100 sensor drift (<0.15 °C deviation), and quarterly cleaning of the stainless-steel bath interior with deionized water and mild detergent.
