DRETOP TDC-2030 Low-Temperature Constant-Temperature Bath

Overview

The DRETOP TDC-2030 Low-Temperature Constant-Temperature Bath is a precision-engineered thermal control system designed for laboratory and industrial applications requiring stable, programmable temperature environments across a broad operational range (−20 °C to 100 °C). It integrates a high-efficiency closed-cycle refrigeration unit with PID-controlled heating and dual-mode circulation—enabling both internal thermal homogenization and external temperature transfer to auxiliary equipment. The system operates on the principle of forced convection heat exchange: a stainless-steel bath reservoir holds thermally conductive fluid (e.g., water, 15% glycol–water mixture), while a submersible centrifugal pump circulates the medium at a consistent flow rate of 13 L/min. Temperature uniformity is maintained via symmetrical heater placement, optimized baffle geometry, and real-time feedback from a calibrated Pt100 sensor mounted in direct thermal contact with the working fluid. This architecture ensures reproducible thermal conditions essential for calibration, material property testing, reaction kinetics studies, and instrument validation protocols.

Key Features

• Full stainless-steel interior chamber and top plate—resistant to corrosion, oxidation, and common organic solvents; compatible with acidic or alkaline media when appropriate fluid selection is applied.
• Hermetically sealed compressor-based refrigeration system with dual safety protection: thermal overload cutoff and overcurrent circuit interruption.
• Dual-port fluid interface (inlet/outlet) supporting flexible configuration—internal recirculation (via connected silicone tubing) or external loop integration with reactors, spectrometers, or analytical detectors.
• LED-backlit digital controller with intuitive menu navigation; standard temperature resolution of 0.1 °C (optional U-series upgrade to 0.01 °C or M-series to 0.001 °C for metrology-grade applications).
• Optimized thermal insulation and low-vibration pump design minimize ambient heat gain and mechanical perturbation—critical for long-duration stability tests.
• Modular footprint: horizontal layout (TDCW-series compatible) enables integration beneath fume hoods or within benchtop enclosures without compromising accessibility.

Sample Compatibility & Compliance

The TDC-2030 accommodates a wide range of sample vessels—including glass jacketed reactors (up to 5 L), immersion probes, viscometer spindles, and optical cuvettes—provided external dimensions fit within the 260 × 220 mm opening and depth constraints. Fluid compatibility is determined by operating temperature: deionized water is recommended for 5–85 °C; above 85 °C, a 15% (v/v) glycerol–water mixture mitigates evaporation and improves thermal stability. The unit complies with IEC 61010-1:2010 for electrical safety in laboratory equipment and meets CE marking requirements for electromagnetic compatibility (EMC Directive 2014/30/EU). While not certified for GMP manufacturing environments, its logging-capable controller supports GLP-aligned documentation when paired with validated external data acquisition systems. Traceable calibration certificates for temperature sensors are available upon request per ISO/IEC 17025 guidelines.

Software & Data Management

The TDC-2030 operates via embedded firmware with no proprietary PC software dependency. All setpoints, ramp rates, hold times, and real-time temperature logs are configurable through the front-panel interface. Event-driven data logging (temperature vs. time) is stored internally for up to 30 days at 1-second intervals and exportable via USB flash drive in CSV format. For integration into centralized lab networks, optional RS485 Modbus RTU communication enables remote monitoring and setpoint adjustment via SCADA or LIMS platforms. Audit trail functionality—including user ID tagging, parameter change timestamps, and firmware version logging—is implemented to support FDA 21 CFR Part 11 compliance when deployed with validated third-party electronic record systems.

Applications

• Calibration of thermocouples, RTDs, and infrared thermometers against NIST-traceable references.
• Viscosity measurement using rotational or capillary viscometers requiring precise thermal conditioning of samples and baths.
• Accelerated aging studies in polymer science and pharmaceutical stability testing (ICH Q1A–Q1E).
• Controlled-temperature reaction initiation and quenching in synthetic organic chemistry workflows.
• Thermal pre-conditioning of sensors, transducers, and microelectromechanical systems (MEMS) prior to performance evaluation.
• Supporting ASTM D2857 (FTIR spectroscopy), ASTM D445 (kinematic viscosity), and ISO 11357 (DSC calibration) test methods.

FAQ

What fluid media are compatible with the TDC-2030 at different temperature ranges?
Deionized water is suitable between 5 °C and 85 °C. For extended high-temperature operation (85–95 °C), a 15% glycerol–water mixture is recommended to suppress boiling and reduce oxidative degradation.
Can the TDC-2030 maintain ±0.1 °C stability during external circulation?
Yes—when properly insulated external tubing is used and total loop volume remains ≤5 L, the system achieves ±1 °C stability at the bath outlet; ±0.1 °C stability is guaranteed within the internal bath chamber under static or low-flow conditions.
Is the unit suitable for use with flammable solvents?
No. The TDC-2030 is not explosion-proof and lacks ATEX or UL Class I Division 2 certification. Only non-flammable, non-toxic heat-transfer fluids should be used.
Does the pump support continuous duty cycling?
Yes—the brushless DC circulation pump is rated for uninterrupted operation at full flow (13 L/min) and includes thermal shutdown protection to prevent dry-run damage.
How is temperature uniformity verified across the bath volume?
DRETOP performs volumetric mapping per ISO 17025 procedures during factory acceptance testing, reporting maximum spatial deviation (typically ≤0.3 °C at 25 °C, ≤0.8 °C at −20 °C) across nine defined points within the 400 × 280 × 250 mm chamber.