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LDH Small Integrated Liquid Nitrogen Machine
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Specifications:
| Application | cryogenics | Warranty | 1 Year |
| Storage Temperature | Ambient | ||
| Product Type | Laboratory Equipment | ||
| Product Grade | Laboratory grade | ||
The LDH Small Integrated Liquid Nitrogen Machine is a plug-in liquid nitrogen generation system designed to produce high-purity liquid nitrogen on demand without the need for bulk LN₂ delivery or external cryogenic supply. Utilizing mixed-refrigerant throttling refrigeration technology, the system efficiently cools nitrogen from ambient temperature to cryogenic levels, enabling stable liquid nitrogen production down to –196 °C.
This compact, fully enclosed system is ideal for laboratories, research facilities, and industrial users seeking safe, continuous, and cost-effective liquid nitrogen generation at low to medium daily capacities.
Working Principle
The LDH system operates using an oil-free air compressor combined with a multi-stage purification and refrigeration process:
- Compressed air passes through adsorption and filtration stages to remove moisture and impurities.
- Purified nitrogen gas is cooled via a multi-component mixed refrigerant cycle, optimized for precise temperature matching across boiling points.
- Nitrogen is liquefied at approximately –196 °C and collected as liquid nitrogen.
- The system delivers sterile, high-purity LN₂ suitable for laboratory and industrial applications.
Key Features & Benefits
- On-site liquid nitrogen production (no external supply required)
- Wide output range: 10–120 L/day depending on model
- High nitrogen purity: ≥ 99.9%
- Compact, fully enclosed cabinet design
- Low operating noise: < 60 dB
- Integrated control interface for easy operation
- Remote monitoring capability (GPRS-enabled)
- Automatic start/stop based on liquid level
- Optional liquid nitrogen Dewar bottle support
Available Models & Capacities
| Model | LN₂ Output | Daily Production |
|---|---|---|
| LPLN-10 | 0.3–0.4 L/h | 8–10 L/day |
| LPLN-20 | 0.8–1 L/h | 20–24 L/day |
| LPLN-40 | 1.6–2 L/h | 40–50 L/day |
| LPLN-80 | 3 L/h | 72 L/day |
| LPLN-120 | 5 L/h | 120 L/day |
Technical Specifications (Summary)
- Nitrogen Purity: ≥ 99.9%
- Nitrogen Pressure: 0.8 MPa
- Nitrogen Dew Point: –60 °C
- Cooling Mode: Air cooling
- Power Supply: 380 V AC / 50 Hz (220 V AC for smaller models)
- Power Consumption: 2–15 kW (model-dependent)
- Operating Noise: < 60 dB
- Ambient Temperature Range: 0–30 °C (good ventilation required)
Installation & Space Requirements
- Minimum room area: > 5–15 m² (model dependent)
- Good ventilation required
- Altitude: > 1000 m requires customization
- Compact footprint suitable for laboratory environments
Control & Monitoring
- Integrated liquefier control interface
- Liquid level-based automatic control
- Remote data monitoring and logging via GPRS
- Alarm and system status display for safe operation
Typical Applications
- Research laboratories
- Cryopreservation and sample storage
- Analytical laboratories
- Industrial testing facilities
- Universities and R&D centers
- Backup LN₂ supply for critical workflows
Advantages Over Bulk LN₂ Supply
- Eliminates dependency on LN₂ deliveries
- Reduces long-term operating costs
- Improves safety and supply continuity
- Ideal for facilities with moderate LN₂ demand
The LDH Small Integrated Liquid Nitrogen Machine provides a reliable, compact, and energy-efficient solution for on-site LN₂ generation. With multiple capacity options, high nitrogen purity, low noise operation, and intelligent control features, it is well-suited for laboratories and facilities requiring consistent cryogenic performance without logistical complexity.
- Capacity: 0.3–0.4 L/h, 8–10 L/day 0.8–1 L/h, 20–24 L/day 1.6–2 L/h, 40–50 L/day 3 L/h, 72 L/day 5 L/h, 120 L/day