Hanuo DL-1005 Benchtop Circulating Chiller
| Brand | Hanuo |
|---|---|
| Origin | Shanghai, China |
| Model | DL-1005 |
| Instrument Type | Integrated Circulating Chiller |
| Cooling Method | Air-Cooled |
| Temperature Range | –10 °C to Ambient |
| Refrigeration Capacity | 350 W |
| Temperature Stability | ±0.5 °C |
| Circulation Pressure | 2.0 bar |
| Flow Rate | 15 L/min |
| Reservoir Volume | 5 L |
| Operation Mode | Continuous & Controllable |
Overview
The Hanuo DL-1005 Benchtop Circulating Chiller is an air-cooled, microprocessor-controlled refrigeration system engineered for precise temperature regulation in laboratory and analytical applications. It operates on the principle of vapor-compression refrigeration using a hermetically sealed compressor, coupled with intelligent PID-based temperature control logic to maintain stable thermal output across extended operating cycles. Designed for integration with external equipment—including spectrophotometers, rotary evaporators, ICP-OES/MS systems, laser sources, and reaction calorimeters—the DL-1005 delivers a continuous flow of temperature-controlled coolant within a range of –10 °C to ambient (typically ~25 °C), enabling both active cooling and low-temperature stabilization of heat-sensitive instrumentation or reaction vessels.
Key Features
- Hermetically sealed air-cooled compressor system with multi-stage protection: compressor delay start, overheat cutoff, and overcurrent circuit interruption.
- Stainless steel reservoir and wetted components compliant with ISO 8502-3 for corrosion resistance and low particulate leaching—critical for long-term fluid integrity in analytical workflows.
- Large-capacity open-bath design (5 L) supporting direct immersion cooling or external circulation via integrated high-head pump (2.0 bar max pressure, 15 L/min flow).
- High-resolution LCD interface with 0.1 °C digital display; user-accessible temperature calibration offset function ensures traceable accuracy against NIST-traceable reference thermometers.
- Continuous-duty operation capability validated under sustained load conditions per IEC 61000-3-2 (harmonic current emissions) and IEC 61000-4-3 (radiated immunity) standards.
- Standard drain valve for controlled fluid replacement—compatible with water, water/glycol mixtures (up to 30% v/v), or other non-corrosive, low-viscosity heat-transfer fluids.
Sample Compatibility & Compliance
The DL-1005 is compatible with standard laboratory-grade coolants and does not require proprietary fluids. Its stainless steel fluid path minimizes metal ion contamination, making it suitable for applications governed by USP , ASTM D1125, and ISO 3696 Grade 3 water specifications when used with deionized water. While the unit itself is not CE-marked for medical device use, its electrical safety architecture complies with IEC 61010-1:2010 (Measurement, Control, and Laboratory Equipment Safety Requirements). For GLP/GMP environments, optional audit trail logging can be implemented via RS232 or analog 0–10 V output interfacing with third-party SCADA or LIMS platforms.
Software & Data Management
The DL-1005 operates autonomously via embedded firmware with no external PC dependency. Temperature setpoint, real-time bath temperature, and operational status are displayed locally. For integration into networked lab infrastructures, analog voltage output (0–10 V proportional to temperature) and RS232 serial communication (ASCII protocol, 9600 bps) support bidirectional control and monitoring. Data logging requires external acquisition hardware; however, the unit’s ±0.5 °C stability meets repeatability requirements for method validation under ISO/IEC 17025 Clause 7.7 (Uncertainty of Measurement) when paired with calibrated secondary sensors.
Applications
- Cooling condensers in rotary evaporation systems to improve solvent recovery efficiency at reduced boiling points.
- Maintaining thermal stability of optical components in UV-Vis, FTIR, and fluorescence spectrometers during prolonged data acquisition.
- Providing consistent low-temperature environments for chromatographic column ovens, particularly in HPLC and GC methods requiring sub-ambient eluent conditioning.
- Thermal management of plasma sources in elemental analysis instruments (ICP-OES, ICP-MS) where thermal drift impacts spectral resolution.
- Supporting low-temperature reaction kinetics studies in synthetic chemistry labs via external jacketed reactors or coil-based heat exchangers.
- Calibration verification of temperature-sensitive probes and sensors in metrology laboratories under controlled thermal gradients.
FAQ
What is the minimum achievable temperature with the DL-1005?
The unit achieves a nominal minimum temperature of –10 °C under standard ambient conditions (25 °C, 50% RH) with clean, low-viscosity coolant and adequate ventilation.
Can the DL-1005 operate continuously for 24/7 applications?
Yes—it is rated for uninterrupted duty cycle operation provided ambient airflow is unobstructed and ambient temperature remains below 32 °C.
Is glycol mixture recommended for sub-zero operation?
A 30% propylene glycol/water blend is compatible and extends freeze protection to approximately –15 °C; viscosity increase must be accounted for in flow path design.
Does the unit meet FDA 21 CFR Part 11 requirements for electronic records?
No—the DL-1005 lacks built-in electronic signature, audit trail, or user access control features required for Part 11 compliance; external data capture systems must fulfill those functions.
What maintenance intervals are recommended?
Compressor oil and refrigerant charge are sealed for life; annual visual inspection of condenser fins, fan operation, and coolant cleanliness is advised per manufacturer guidelines.
