DRETOP CL-45-60H Circulating Chiller

Overview

The DRETOP CL-45-60H Circulating Chiller is an engineered thermal management system designed for precise, stable, and continuous temperature control in demanding laboratory and industrial environments. It operates on a closed-loop refrigeration cycle using R410A or R134a refrigerant (model-dependent), integrated with a high-efficiency water-cooled condenser and a corrosion-resistant stainless-steel reservoir. The unit delivers consistent cooling performance across its full operating range (5–35 °C), with temperature stability maintained via PID-based feedback control architecture. Its design prioritizes thermal uniformity, low drift, and minimal self-heating interference—critical for applications where instrument thermal drift directly impacts measurement accuracy (e.g., spectroscopic detectors, mass spectrometer ion sources, or NMR probe cooling). Unlike air-cooled chillers, the water-cooled configuration enables higher heat rejection efficiency in confined spaces and reduces ambient heat load, making it suitable for installation in shared equipment rooms or under benches with limited ventilation.

Key Features

• PID-integrated digital temperature controller with ±0.1 °C setpoint resolution and fast dynamic response to thermal load changes;
• Stainless-steel reservoir (45 L capacity) and circulation tubing with fully sealed, oxidation-resistant construction to prevent coolant degradation and microbial growth;
• Low-heat-generation centrifugal circulation pump rated for continuous operation at up to 60 L/min flow and 4 bar pressure, with adjustable flow control and built-in dry-run protection;
• Multi-layer safety architecture including real-time flow monitoring, liquid level detection, overtemperature cutoff, compressor overcurrent/overheat protection, and configurable upper/lower temperature alarm thresholds;
• RS485 serial interface (Modbus RTU protocol) supporting bidirectional communication for remote parameter setting, real-time data logging, and integration into centralized lab management systems;
• Robust mechanical design compliant with IEC 61000-6-2 (EMC immunity) and IEC 61000-6-4 (EMC emission) standards; IP20-rated enclosure for indoor laboratory use.

Sample Compatibility & Compliance

The CL-45-60H is compatible with a broad spectrum of analytical, process, and research instrumentation requiring active cooling—including but not limited to atomic absorption spectrometers (AAS), inductively coupled plasma optical emission spectrometers (ICP-OES), X-ray tube assemblies, rotary evaporators, vacuum pumps (diffusion and molecular), FTIR spectrometers, and laser-based systems. Its closed-loop architecture supports both aqueous and glycol-water coolant mixtures (up to 30% ethylene or propylene glycol), enabling operation down to −10 °C when paired with appropriate antifreeze formulation (note: standard rating is 5–35 °C). The unit meets CE marking requirements and conforms to ISO/IEC 17025-relevant environmental control provisions for accredited testing laboratories. While not inherently 21 CFR Part 11 compliant, its RS485 data logging capability allows integration with validated software platforms that support audit trails, electronic signatures, and secure user access control per GLP/GMP workflows.

Software & Data Management

The chiller’s embedded controller stores up to 30 days of timestamped temperature, flow, and status logs (sampled at 10-second intervals) internally. Logged data can be exported via RS485 to third-party SCADA or LIMS platforms using standard Modbus register mapping. Optional OEM firmware upgrades enable CSV export via USB host port (when equipped), facilitating offline trend analysis in Excel or Python-based QA/QC pipelines. No proprietary software is required for basic operation; all configuration and monitoring are accessible via front-panel keypad and LCD display. For enterprise deployment, the device supports Modbus TCP gateway bridging for inclusion in Ethernet-based facility monitoring networks.

Applications

• Life Sciences: Maintaining stable thermal conditions for HPLC column ovens, PCR thermal cyclers, and cryo-microtome stages;
• Materials Characterization: Cooling XRD goniometers, SEM/TEM cold stages, and laser-induced breakdown spectroscopy (LIBS) sample chambers;
• Pharmaceutical R&D: Managing exothermic reaction profiles in jacketed reactors and controlling crystallization temperatures during API synthesis;
• Electronics Manufacturing: Stabilizing solder paste reflow oven chill zones and cooling high-power RF amplifiers during burn-in testing;
• Academic Research: Providing stable coolant supply to custom-built optical traps, quantum optics setups, and superconducting magnet cryocooler pre-cooling loops;
• Industrial Process Support: Regulating die temperatures in injection molding machines, maintaining bath uniformity in electroplating tanks, and stabilizing hydraulic oil in precision machining centers.

FAQ

What is the minimum allowable coolant temperature for continuous operation?
The CL-45-60H is rated for 5–35 °C under standard configuration. With 25% propylene glycol/water mixture and optional low-temp firmware, sustained operation down to −5 °C is achievable—subject to validation of pump lubrication and expansion tank headroom.
Can this chiller be integrated into a building management system (BMS)?
Yes—via RS485 Modbus RTU interface. Register maps and integration guides are available upon request for BACnet/IP or LonWorks gateway configuration.
Is the reservoir accessible for routine maintenance and coolant replacement?
Yes—the top-mounted stainless-steel lid provides full access to the reservoir interior, level sensor, and inlet/outlet manifolds. Drain valve is located at the base for complete fluid evacuation.
Does the unit support external temperature feedback from a process load?
Not natively; however, the RS485 interface allows external PLCs to read chiller output temperature and modulate setpoints dynamically using Modbus write commands to designated holding registers.
What certifications does the CL-45-60H hold for international shipment?
CE-marked (EMC & LVD directives), RoHS-compliant, and supplied with EN 61000-6-2/6-4 test reports. UL/cUL listing is available upon request for North American deployments (requires factory-installed safety components and documentation package).