Daxluot DLM-0503 Compact Air-Cooled Circulating Chiller

Overview

The Daxluot DLM-0503 is a compact, air-cooled circulating chiller engineered for precision temperature control in laboratory and small-scale process applications. Utilizing a hermetically sealed scroll-type compressor and microprocessor-based PID temperature regulation, it delivers stable thermal management across a wide operational range of −5 °C to 100 °C. Unlike water-cooled chillers requiring external cooling towers or tap-water connections, the DLM-0503 relies on forced-air heat exchange—making it ideal for environments with limited infrastructure or space constraints, such as fume hoods, benchtop reactors, rotary evaporators, spectrophotometers, and analytical instrumentation requiring consistent coolant supply. Its integrated reservoir (3.5 L), high-flow circulation pump (8 L/min at 0.7 bar), and low-thermal-mass design enable rapid thermal equilibration and minimal overshoot during setpoint transitions. The unit operates continuously under load without duty-cycle interruption, supporting unattended overnight experiments and long-duration stability testing.

Key Features

• Intelligent dual-mode temperature control: Independent activation of heating, cooling, and internal/external circulation functions enables flexible thermal workflow integration.
• High-visibility backlit LCD interface with real-time display of setpoint, actual bath temperature, and system status—resolution of 0.1 °C supports fine-grained experimental calibration.
• Robust ABS molded housing with tool-free side-panel access simplifies routine maintenance, coil cleaning, and internal inspection without disassembly tools.
• Hermetically sealed, low-noise circulation pump with brushless DC motor architecture ensures continuous operation with negligible heat generation and extended service life (>20,000 hours MTBF).
• Integrated safety architecture includes dry-run protection for heater elements, overtemperature cutoff (±2 °C deviation threshold), compressor overcurrent/overheat interlock, and simultaneous audible/visual alarm signaling.
• Stainless steel (304) bayonet-style fluid interfaces provide corrosion resistance, leak-tight sealing, and rapid hose coupling—compatible with silicone, Viton®, and PTFE tubing systems.
• Transparent level window with calibrated scale, sealed fill port, overflow drain, and concealed bottom-mounted stainless steel drain valve support safe, spill-free fluid handling and residue-free reservoir emptying.

Sample Compatibility & Compliance

The DLM-0503 is compatible with standard laboratory heat-transfer fluids including deionized water, 30% ethylene glycol/water mixtures, and low-viscosity silicone oils (up to 50 cSt). It meets general-purpose laboratory safety requirements per IEC 61010-1:2010 (Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use) and complies with electromagnetic compatibility standards EN 61326-1:2013. While not certified for GMP or FDA 21 CFR Part 11 environments out-of-the-box, its deterministic control logic, non-volatile parameter storage, and audit-ready alarm logging (via optional RS485/Modbus RTU interface) support validation pathways for GLP-compliant workflows in QC labs and R&D settings.

Software & Data Management

The DLM-0503 operates via embedded firmware with no external software dependency. All operational parameters—including temperature setpoints, pump speed (fixed at optimal flow rate), alarm thresholds, and runtime counters—are stored in non-volatile memory and retained after power loss. Optional digital communication modules (RS485 Modbus RTU or USB-to-serial adapter) enable remote monitoring and integration into SCADA or LabVIEW-based supervisory systems. Logged events—including timestamped overtemperature alerts, power interruptions, and sensor faults—are accessible via serial query commands, facilitating traceability in regulated environments where procedural documentation is required.

Applications

• Temperature stabilization of HPLC column ovens, UV-Vis detectors, and mass spectrometer ion sources.
• Cooling of laser diodes, CCD cameras, and optical interferometers requiring sub-degree thermal drift control.
• Thermal conditioning of small-volume jacketed reactors (≤2 L), condensers, and reflux assemblies in synthetic chemistry labs.
• Supporting cryogenic sample preparation stages in biophysics and materials characterization (e.g., DSC pre-cooling, rheometer temperature ramps).
• Calibration of thermocouples, RTDs, and infrared thermometers using NIST-traceable reference baths (when paired with certified transfer standards).

FAQ

What is the maximum allowable ambient temperature for continuous operation?
The unit is rated for continuous duty at ambient temperatures up to 35 °C. Performance derating begins above this threshold; refrigeration capacity declines approximately 1.2% per °C rise beyond 35 °C.
Can the DLM-0503 be used with organic solvents?
Only with verified chemical compatibility: avoid chlorinated hydrocarbons, acetone, and low-flashpoint ethers. Compatible coolants include aqueous glycol blends, polyalphaolefins (PAO), and methylsilicone oils—confirm material compatibility with pump seals and reservoir gaskets prior to use.
Is external temperature feedback supported?
Yes—via optional PT100 input terminal block (sold separately), enabling external probe-based control for process-critical applications where bath temperature differs from target device surface temperature.
Does the unit meet IP rating requirements for humid lab environments?
The enclosure carries an IP20 rating (limited protection against solid objects >12.5 mm; no ingress protection against water). It is intended for indoor, dry-lab installation—not splash-prone or washdown areas.
What maintenance intervals are recommended?
Compressor oil and refrigerant integrity require verification every 24 months under normal use; air filter cleaning is advised quarterly. Condenser coil inspection and dust removal should occur biannually in particulate-rich environments.