Hanuo DL-1015 Cryogenic Constant Temperature Circulator
| Brand | Hanuo |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | DL-1015 |
| Price | USD 1,420 (FOB Shanghai) |
| Cooling Capacity | 800 W at –15 °C |
| Bath Volume | 15 L |
| Temperature Range | –15 °C to +100 °C |
| Temperature Stability | ±0.5 °C |
| Pump Flow Rate | 15 L/min |
| Minimum Achievable Temperature | –15 °C |
| Refrigeration System | Air-Cooled, Hermetic Compressor |
| Control Interface | Microprocessor-Based Touchscreen LCD |
| Timer Shutdown | 0–100 h Adjustable |
| Construction | 304 Stainless Steel Bath & Housing |
| External Circulation | Yes, Integrated Dual-Loop Design |
| Safety Protections | Compressor Delay, Overheat, Overcurrent, Low-Level Alarm |
Overview
The Hanuo DL-1015 Cryogenic Constant Temperature Circulator is an air-cooled, microprocessor-controlled recirculating chiller engineered for precision thermal management in laboratory and industrial R&D environments. It employs a hermetically sealed scroll compressor refrigeration system coupled with a high-efficiency plate heat exchanger to deliver stable low-temperature coolant flow across a wide operational range (–15 °C to +100 °C). Unlike immersion-style chillers, the DL-1015 integrates a large-capacity open-bath reservoir (15 L) with a robust external circulation pump (15 L/min), enabling simultaneous temperature control of both internal bath media and externally connected analytical instruments—such as spectrophotometers, rotary evaporators, NMR pre-coolers, or reaction calorimeters. Its closed-loop glycol/water-compatible fluid path minimizes evaporation loss and ensures long-term thermal consistency under continuous operation. The unit conforms to IEC 61000-6-3 (EMC) and IEC 61000-6-2 (immunity) standards, and its mechanical design meets ISO 13849-1 PLc functional safety requirements for auxiliary cooling systems.
Key Features
- 304 stainless steel bath and housing—resistant to corrosion, cryogenic embrittlement, and chemical exposure from common coolants (e.g., 30% ethylene glycol/water mixtures)
- Dual-mode operation: internal bath temperature stabilization and external closed-loop circulation via integrated quick-connect fittings (G1/4″ BSP)
- Intelligent microprocessor controller with 7-inch backlit TFT-LCD touchscreen, real-time graphing of temperature vs. time, and user-configurable setpoints with ramp-soak profiles
- Programmable auto-shutdown timer (0–100 hours), ideal for unattended overnight experiments or energy-conserving protocols
- Comprehensive protection suite: compressor start-delay (3 min), high-pressure cutout, motor overcurrent sensing, low-bath-level detection, and ambient overheat lockout
- Ergonomic front-mounted drain valve with PTFE-sealed ball mechanism for rapid, spill-free coolant exchange
- Low-noise operation (<62 dB(A) at 1 m), suitable for shared lab spaces and cleanroom-adjacent installations
Sample Compatibility & Compliance
The DL-1015 circulates non-aggressive heat-transfer fluids—including deionized water, 20–50% aqueous glycol solutions, and silicone oils (viscosity ≤50 cSt)—and is compatible with standard laboratory tubing (EPDM, Viton®, or silicone, ID 8–12 mm). It supports GLP/GMP workflows through audit-trail-capable data logging (optional RS485/Modbus RTU interface) and complies with key regulatory frameworks: ASTM E2877-22 (performance verification of liquid baths), ISO 17025:2017 Clause 6.4.7 (environmental monitoring equipment), and EU Machinery Directive 2006/42/EC. While not FDA 21 CFR Part 11–validated out-of-the-box, its firmware architecture supports third-party electronic signature integration when deployed with compliant LIMS platforms.
Software & Data Management
The embedded controller stores up to 10,000 timestamped temperature readings (1-second resolution) internally. Data export is supported via USB flash drive (CSV format) or optional Ethernet module (TCP/IP client/server mode). An SDK is available for Python- and LabVIEW-based custom automation, enabling synchronization with chromatography data systems (CDS), SCADA networks, or MES platforms. All parameter changes—including setpoint adjustments, timer activation, and alarm thresholds—are logged with user ID (if configured), timestamp, and pre-/post-value deltas—meeting basic ALCOA+ data integrity criteria for non-critical applications.
Applications
- Condenser cooling for rotary evaporation under reduced pressure (–10 °C to –15 °C glycol supply)
- Thermal regulation of UV-Vis and FTIR spectrophotometer detectors and sample compartments
- Pre-chilling of HPLC autosampler trays and column ovens in QC laboratories
- Temperature control of bioreactor jacket loops during microbial fermentation studies
- Calibration support for thermocouple and RTD reference baths per ISO/IEC 17025
- Material testing in rheology and DSC sample stages requiring sub-zero thermal anchoring
FAQ
What is the minimum recommended coolant mixture for –15 °C operation?
A 35% propylene glycol / 65% deionized water mixture (freezing point ≈ –17 °C) is recommended to ensure reliable pump priming and avoid ice nucleation in the heat exchanger.
Can the DL-1015 be integrated into a building BMS via analog signals?
Yes—via optional 4–20 mA output (temperature feedback) and 0–10 V input (remote setpoint override), configurable through the service menu.
Is the bath volume sufficient for immersion of standard 1 L jacketed reactors?
The 15 L bath accommodates immersion of vessels up to Ø180 × H300 mm; for larger reactors, external circulation is required and recommended.
Does the unit include a built-in filtration system for particulate removal?
No—external inline 5 µm stainless steel mesh filters are advised when circulating reclaimed or aged coolant to prevent pump wear.
What maintenance intervals are specified for compressor oil and refrigerant?
Hermetic compressors require no scheduled oil changes; refrigerant charge verification is recommended every 36 months or after any leak repair, per ASHRAE Standard 15.
