Scientz DLK-5001 Compact Air-Cooled Circulating Chiller

Overview

The Scientz DLK-5001 is a compact, air-cooled circulating chiller engineered for precision temperature control in laboratory-scale thermal management applications. It operates on the principle of vapor-compression refrigeration using an environmentally compliant refrigerant (R134a or equivalent), delivering stable, repeatable cooling performance across a wide operational range (–10 °C to 25 °C). Designed as an integrated unit with no external condenser water requirements, the DLK-5001 eliminates dependency on municipal water supply and ambient humidity—ensuring consistent condensation efficiency during rotary evaporation, reflux, or cold-trap operation regardless of seasonal or facility-wide environmental fluctuations. Its closed-loop circulation architecture enables both internal reservoir temperature stabilization and external load conditioning, making it suitable for direct integration with rotary evaporators, jacketed reactors, spectrophotometer Peltier modules, and analytical instrument cooling manifolds.

Key Features

• Intelligent PID Temperature Control: Microprocessor-based controller with auto-tuning capability ensures rapid thermal equilibration and high reproducibility (±0.5 °C stability) under dynamic load conditions.
• 7-inch Tilted Touchscreen Interface: High-contrast, glare-resistant display with intuitive navigation; supports real-time monitoring of setpoint, actual temperature, elapsed time, and system status—including compressor duty cycle and pump runtime.
• High-Efficiency Air-Cooled Refrigeration: Equipped with a hermetically sealed, low-noise scroll compressor (Panasonic or Tecumseh/Tecumseh-derived OEM units), optimized for continuous operation at ambient temperatures up to 35 °C.
• Dual-Mode Circulation System: Switchable between internal recirculation (for bath temperature uniformity) and external loop mode (with adjustable flow and pressure up to 1.2 bar), accommodating diverse connection geometries and line resistance profiles.
• Energy-Saving Timer Function: Programmable run-time scheduler allows unattended operation with automatic shutdown upon completion—critical for overnight solvent recovery or long-duration crystallization protocols.
• Robust Safety Architecture: Comprehensive protection suite includes compressor overheat detection, phase-loss monitoring, low-flow cutoff, reservoir level sensing, and brownout-resilient power-up logic with configurable auto-restart behavior.
• Space-Optimized Footprint: Compact chassis (260 × 340 × 300 mm) minimizes benchtop occupancy while maintaining a 15 L stainless-steel reservoir and sufficient thermal mass for transient load absorption.

Sample Compatibility & Compliance

The DLK-5001 is compatible with standard laboratory fluid media including deionized water, 30% ethylene glycol/water mixtures, and other non-corrosive heat-transfer fluids approved for use with stainless-steel wetted parts (304 SS reservoir, brass fittings, EPDM seals). It meets CE marking requirements for electromagnetic compatibility (EN 61326-1) and low-voltage safety (EN 61010-1). While not certified for GMP or FDA 21 CFR Part 11 environments out-of-the-box, its deterministic control algorithm, non-volatile parameter storage, and timestamped operational logs support GLP-aligned documentation practices when integrated into validated workflows. The unit complies with ISO 13485-aligned manufacturing controls per Scientz’s quality management system (certified by SGS).

Software & Data Management

The DLK-5001 operates autonomously via its embedded controller without requiring external software. All configuration parameters—including temperature setpoints, timer values, pump speed presets, and alarm thresholds—are stored in non-volatile memory and retained after power interruption. While no native USB/RS-485 interface is included in the base model, optional analog output (0–10 V or 4–20 mA) can be factory-installed for integration into centralized building management systems (BMS) or SCADA platforms. For auditability, event logs record compressor start/stop cycles, fault codes, and manual override actions—accessible via on-screen history browser with scrollable timestamps.

Applications

• Rotor Evaporation Support: Provides stable condenser cooling for 1–4 parallel rotary evaporators operating at 40 °C bath temperature, maintaining sub-10 °C coolant outlet consistently—even during extended concentration cycles.
• Solvent Extraction Protocols: Enables Soxhlet and accelerated solvent extraction (ASE) systems to maintain precise cold-trap temperatures (e.g., –5 °C to 5 °C), ensuring quantitative recovery of volatile analytes from food, feed, and botanical matrices per AOAC 996.06 and ASTM D5504.
• Synthesis & Reaction Calorimetry: Supplies controlled coolant to jacketed glass reactors (50–1000 mL scale), supporting exothermic Grignard additions, nitration steps, or polymerization initiations where ΔT must remain within ±1 °C.
• Analytical Instrument Cooling: Maintains thermal equilibrium for HPLC column ovens, GC detector blocks, and FTIR beam condensers requiring stable sub-ambient thermal sinks independent of chilled water infrastructure.
• Material Testing Environments: Supports thermal cycling of polymer films, battery electrolyte samples, or pharmaceutical excipients under ISO 11357-3 and USP environmental simulation conditions.

FAQ

What refrigerant does the DLK-5001 use, and is it compliant with current environmental regulations?
The unit utilizes R134a (1,1,1,2-tetrafluoroethane), a zero-ozone-depletion-potential (ODP = 0) hydrofluorocarbon refrigerant permitted under the EU F-Gas Regulation (EC) No 517/2014 and EPA SNAP program for laboratory chillers.
Can the DLK-5001 cool below 0 °C while circulating fluid through an external reactor?
Yes—its rated operating range extends to –10 °C at the reservoir outlet. When paired with a 30% glycol/water mixture and properly insulated external lines, it reliably maintains –5 °C to 0 °C at the load interface under typical lab ambient conditions (≤25 °C).
Is remote monitoring or control possible without hardware modification?
No native network connectivity is provided. Remote supervision requires third-party analog signal acquisition or optional factory-installed analog I/O modules.
Does the unit meet noise requirements for quiet-zone laboratories?
At ≤55 dB(A) at 1 m distance under full-load operation, it satisfies ISO 15710 acoustic guidelines for general-purpose research labs and aligns with NIH Design Requirements for Core Facility Equipment.
How frequently should maintenance be performed?
Compressor oil and refrigerant charge are sealed-for-life per manufacturer specification. Recommended annual verification includes cleaning condenser fins, checking pump seal integrity, inspecting reservoir for particulate accumulation, and validating temperature sensor calibration against NIST-traceable reference standards.