Scientz DLK-5007 Low-Temperature Circulating Chiller

Overview

The Scientz DLK-5007 Low-Temperature Circulating Chiller is an engineered thermal management system designed for precision temperature control in laboratory and analytical applications requiring stable, reproducible cold–hot liquid circulation. Operating on the principle of vapor-compression refrigeration combined with resistive heating, the unit delivers tightly regulated fluid temperatures from −5 °C up to ambient (typically 25 °C), with stability maintained at ±0.1 °C across its operational range. Its dual-mode capability—supporting both internal bath temperature regulation and external load cooling/heating via high-pressure circulation—makes it suitable as a standalone constant-temperature bath or as a dedicated thermal source for peripheral equipment including rotary evaporators, atomic absorption spectrometers, condensers, and reaction calorimeters. The chiller employs an environmentally compliant refrigerant (R-410A or equivalent), aligning with international standards such as ISO 5149 and EU F-Gas Regulation (EU No. 517/2014). All critical components—including the hermetic compressor, expansion valve, and PID-controlled heater—are sourced from globally recognized suppliers (e.g., Panasonic, Tecumseh), ensuring long-term reliability under continuous operation.

Key Features

• 7-inch tilted capacitive touchscreen interface with intuitive navigation, real-time display of setpoint/actual temperature, elapsed time, and system status
• Dual-circulation architecture: switchable between internal recirculation (for bath homogeneity) and external loop delivery (max. pressure ≥0.3 MPa, flow rate ≥15 L/min)
• PID-based digital temperature control with adaptive tuning, enabling rapid thermal equilibration and minimal overshoot
• Intelligent power recovery: retains user-defined parameters and operational state after power interruption; configurable auto-start or standby cooldown profile on power-up
• Integrated safety protocols: compressor overheat protection, current overload cutoff, low-level fluid alarm, and dry-run prevention
• Compact footprint (W × D × H ≈ 320 × 450 × 580 mm) optimized for benchtop integration in space-constrained laboratories
• Low-noise operation (<55 dB(A)) achieved via vibration-damped mounting and acoustically insulated compressor housing

Sample Compatibility & Compliance

The DLK-5007 is compatible with aqueous, ethylene glycol–water mixtures (up to 30% v/v), and other non-corrosive heat-transfer fluids meeting ASTM D1384 specifications. It conforms to IEC 61010-1:2010 for electrical safety in laboratory equipment and meets CE marking requirements for EMC (EN 61326-1) and low-voltage directives. For regulated environments—including GLP, GMP, and FDA 21 CFR Part 11–compliant labs—the unit supports audit-ready operation when paired with Scientz’s optional data logging software (DL-Log v3.2), which provides timestamped temperature records, user access logs, and electronic signature capability. It is routinely deployed in facilities adhering to ISO/IEC 17025 for testing and calibration laboratories.

Software & Data Management

While the DLK-5007 operates autonomously via its embedded controller, optional USB- or RS485-enabled connectivity allows integration into centralized lab monitoring systems. Scientz’s DL-Log software (Windows-compatible) enables continuous acquisition of temperature, flow status, compressor runtime, and error codes at 1-second intervals. Export formats include CSV and PDF reports compliant with ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available). Data integrity safeguards include write-protection, automatic backup, and role-based user permissions (Admin/Operator/Viewer).

Applications

• Rotary Evaporation: Simultaneous cooling of 1–4 evaporation units at fixed condenser temperatures (e.g., 10 °C), independent of ambient fluctuations
• Atomic Absorption Spectroscopy (AAS): Stable coolant supply for graphite furnace atomizers and flame photometers requiring ≤15 °C inlet water
• Extraction & Soxhlet Analysis: Precise condenser temperature control during fat or lipid extraction per AOAC 991.36 and ISO 6496
• Synthesis & Reaction Calorimetry: External jacket cooling/heating for reactors (5–50 mL scale) under exothermic/endothermic conditions
• Material Testing: Thermal conditioning of viscometers, rheometers, and particle size analyzers per ASTM D445, ISO 3219, and ISO 13320

FAQ

What is the maximum external loop pressure this chiller can sustain?
The DLK-5007 delivers up to 0.35 MPa (3.5 bar) static pressure at the outlet, sufficient for multi-point distribution to rotary evaporators or parallel condensers.
Can it maintain −5 °C continuously in a 30 °C ambient environment?
Yes—its cooling capacity (≥1.2 kW @ −5 °C, ΔT = 25 K) ensures uninterrupted operation at full low-temperature setpoint under standard lab conditions.
Is the unit compatible with deionized water?
Deionized water may be used, but corrosion inhibitors or 20–30% propylene glycol are recommended for extended service life and freeze protection.
Does it support remote start/stop via digital I/O?
Optional dry-contact terminals (available upon request) enable integration with building management systems or PLC-controlled workflows.
How often does the refrigerant require servicing?
Under normal operation and proper maintenance (annual filter inspection, condenser coil cleaning), the sealed refrigeration circuit requires no replenishment over a 10-year service life.