SOPTOP DLX0520 Series Integrated Circulating Chiller

Overview

The SOPTOP DLX0520 Series Integrated Circulating Chiller is an engineered thermal management solution designed for precise, stable, and continuous temperature control in laboratory and pilot-scale analytical and process applications. It operates on a closed-loop refrigeration cycle utilizing an environmentally compliant, non-ozone-depleting refrigerant blend—optimized for efficiency, low noise, and long-term reliability. The unit integrates a high-efficiency hermetic compressor, copper-aluminum finned condenser with water-cooled heat rejection, and a microprocessor-controlled expansion system to maintain setpoint accuracy across variable thermal loads. Its core function is to supply chilled, temperature-stabilized fluid (typically water or water-glycol mixtures) to external equipment—including spectrometers, rotary evaporators, reactors, and analytical detectors—while simultaneously enabling direct bath-based experimentation within its 20 L open-top reservoir. This dual-mode capability (external circulation + internal bath use) eliminates the need for separate chillers and immersion baths, reducing footprint, installation complexity, and operational overhead.

Key Features

• LCD-based microprocessor controller with intuitive menu navigation and real-time display of setpoint, actual bath temperature, pump status, and system alarms
• PID digital temperature regulation delivering ±0.1 °C stability over the full 5–40 °C operating range—validated under dynamic load conditions per ISO 17025 traceable procedures
• Water-cooled condenser design ensures consistent performance in ambient environments up to 35 °C, eliminating dependency on air-cooling space or ventilation ducting
• Adjustable circulation pump with pressure up to 1.3 bar and flow rate from 0–30 L/min—equipped with integrated pressure relief and dry-run protection
• Large 320 × 230 mm bath opening with 220 mm depth facilitates easy access for large probes, reactors, or multi-vessel setups; stainless steel bath interior resists corrosion and meets GLP-compliant cleaning protocols
• Robust structural frame and vibration-dampened mounting minimize mechanical transmission to sensitive instruments such as ICP-MS or FTIR systems

Sample Compatibility & Compliance

The DLX0520 supports compatibility with aqueous and glycol-based heat transfer fluids (up to 30% ethylene or propylene glycol), ensuring freeze protection down to –15 °C when configured for sub-ambient operation (via optional low-temp kit). It interfaces seamlessly with major OEM instrumentation requiring external cooling—e.g., PerkinElmer AAS, Thermo Fisher Q Exactive mass spectrometers, Bruker XRF systems, and Sartorius bioreactors—via standard 1/2″ NPT or G1/2 threaded ports. The chiller complies with IEC 61010-1:2010 for electrical safety in laboratory environments and meets CE marking requirements for EMC (EN 61326-1) and low voltage directives. While not intrinsically rated for hazardous locations, its sealed refrigeration circuit and grounded chassis support use in ISO Class 7 cleanrooms and GMP-aligned QC laboratories when installed per manufacturer-specified clearance and drainage guidelines.

Software & Data Management

The DLX0520 operates autonomously via its embedded controller and does not require proprietary PC software for basic operation. However, it features an RS-485 serial interface (Modbus RTU protocol) for integration into centralized lab infrastructure monitoring platforms (e.g., LabVantage, Siemens Desigo, or custom SCADA systems). Optional analog 4–20 mA output enables connection to PLC-based environmental loggers for audit-ready temperature trending. All critical operational parameters—including runtime hours, compressor cycles, high/low temperature excursions, and pump fault events—are stored in non-volatile memory with timestamping, supporting 21 CFR Part 11–compliant electronic record retention when paired with validated third-party data acquisition software. Remote alarm relay outputs (NO/NC) can trigger building management systems or local audible/visual alerts during out-of-spec conditions.

Applications

• Stabilizing detector temperatures in atomic absorption spectroscopy (AAS), inductively coupled plasma (ICP-OES/MS), and X-ray fluorescence (XRF) systems to reduce thermal drift and improve signal-to-noise ratio
• Condenser cooling for rotary evaporation under vacuum, enabling solvent recovery at controlled rates without bumping or foaming
• Temperature control of jacketed bioreactors, fermentation vessels, and enzymatic reaction blocks in upstream bioprocessing development
• Thermal conditioning of laser sources, optical benches, and interferometric measurement systems where micron-level dimensional stability is required
• Supporting accelerated stability testing chambers by providing auxiliary cold-side heat rejection in HVAC-integrated environmental test suites

FAQ

What is the maximum allowable glycol concentration for use with the DLX0520?

The unit is rated for heat transfer fluids containing up to 30% (v/v) propylene or ethylene glycol; higher concentrations increase viscosity and reduce effective heat transfer capacity and pump efficiency.
Can the chiller operate continuously for 24/7 applications?

Yes—the DLX0520 is engineered for uninterrupted duty cycles with thermal overload protection, automatic defrost sequencing, and compressor cycling logic optimized for >10,000 hours MTBF.
Is external water cooling water quality specified?

Deionized or softened water with conductivity < 100 µS/cm and hardness < 50 ppm CaCO₃ is recommended; untreated municipal water requires inline filtration and scale-inhibitor dosing to prevent condenser fouling.
Does the unit include a drain valve for maintenance?

Yes—a front-mounted quick-release drain valve allows complete fluid evacuation without disassembly; location and torque specifications are documented in the service manual.
How is temperature calibration verified?

The built-in Pt100 sensor is factory-calibrated against NIST-traceable reference standards; users may perform field verification using a calibrated secondary thermometer inserted into the bath’s dedicated calibration port (M12 thread).