GM Cryo-cooler Liquid Nitrogen Generator 20L/day On Site LN2 Supply for Labs
- Model
- LNS20A
Item specifics
- Liquid Nitrogen Output
- 20 liters per day
- Color
- White
- Patented
- Yes
- OEM
- Yes
- Warranty
- 1 Year
- Spare Parts
- On request
Review
Description
Introduction

LNS20A
Advanced all-in-one on site liquid nitrogen system powered by GM Cryo-cooler Technology
20
L/Day50
L Dewar<60
dBA10''
HMI
Scala's LNS-20A Liquid Nitrogen Generator is designed for efficient and continuous production of high-purity liquid nitrogen, with daily output configurable according to user requirements. The system operates in a 24-hour continuous mode with 220V 50/60Hz electricity supply, maximum power consumption 2.8kW.
LNS-20A integrates an air compressor, PSA nitrogen generator, nitrogen buffer tank and GM cryo-cooler mounted on top of a 50-liter dewar. As a highly compact unit, it produces liquid nitrogen directly from the air with output over 20 liters per day.
LNS20A Liquid Nitrogen Generator Flow Chart

Features
GM Cryo-cooler Based Technology
· 10'' Siemens® Touch Screen
· WiFi loT Module
· 4G Module (Optional)
· Auto Start/Stop Liquid Nitrogen Production
· Touch Screen Liquid Nitrogen Dispensing
· Real-time Liquid Nitrogen Production Rate Display
· Liquid Nitrogen Level Display
· Nitrogen Gas Purity Display & Alarm
· Dewar Temperature Display
· Dewar Vacuum & Pressure Alarm
· Physical On/Off/Emergency Stop Buttons
· Sound & Light Buzzer

Next-Generation Liquid Nitrogen Generator Powered by GM Cryo-cooler
In the global market for on site liquid nitrogen generators, the GM (Gifford-McMahon) cryo-cooler is the dominant technology, accounting for over 95% of sales. Prized for its stable refrigeration performance based on the principle of gas adiabatic expansion, GM cryo-coolers are essential in critical fields like NMR, quantum communication, medical care and semiconductors.
Based on this advanced technology, Scala developed LNS20A liquid nitrogen generator with a daily output of 20 to 50 liters, offering a versatile solution adaptable to various user scenarios.
Details

Design Philosophy
Modern Industrial Appearance: Simple and clean white color scheme built with sturdy composite material, providing protection and durability.
Interface and Controls: 10'' colored Siemens® HMI with power indicator and emergency stop designed for easy access and operation.
Mobility: Mounted on FOOT MASTER® castors allows easy movement, facilitating its relocation as per requirements.
Ergonomic Reference: Human-centric design considerations for interfaces or access points with 1750mm height.
Lifting Holes: Provide secure anchor points to prevent slippage or imbalance during tranporation and installation.
Gifford-McMahon (GM) Cryocooler
High Efficiency Refrigeration: High thermodynamic efficiency makes it quickly reaches to the 77K low temperature for nitrogen gas liquefication.
Compact and Portable: The cold head is designed compact, occupying small space, which allows Scala liquid nitrogen generator overall in small footprint.
Reliable Operation: With mature technology for decades, it has high reliability and can be used in industrial and scientific research scenarios while keep stable performance.
Convenient Maintenance: Phase - adjusting device in the cryocooler reduces refrigeration performance caused sealing ring which greatly extends the maintenance cycle and service life.
CE & UL Certified: GM cryocoolers have been proved reliable and safety throughout the world


Vacuum Insulated Dewar
Mounted Struture: The vertical dewar mounted by cryocooler at the top significantly improves the liquefication performance.
Lower LN2 Vaporization: The cold head at the top keeps the liquid nitrogen at liquefication temperature, reducing the waste caused by evaporation.
Maintenance Free: Lifespan more than 10 years, which means no need for replacement throughout its entire life cycle.
Super Large Volume: Built-in 50 liters volume dewar that can meet most using senarios without external LN2 tanks.
Clear Operation
10'' Siemens Touch Screen: The Siemens® touch screen displays crucial parameters of the system including real-time production rate, liquid nitrogen level, nitrogen purity, pressure and running status of cryo-cooler, providing convenient operation and easy troubleshooting.
Touch Screen Liquid Nitrogen Dispensing: LNS20A enables operator to dispense liquid nitrogen directly and safely by touching the screen.
Physical On/Off/Emergency Button: While software-based controls offer flexibility and sleek design, the physical On/Off button remains superior in safety, reliability, accessibility, and providing clear, immediate control.

Specifications
Machine Model: LNS20A
Liquid Nitrogen Output | 20 liters per day |
Liquid Nitrogen Purity | 99.5-99.9% |
In-built Dewar Volume | 50 Liters |
Air Compressor | Oil-free |
Nitrogen Generator Type | PSA Nitrogen Generator |
Cryo-cooler Type | Gifford-McMahon (GM) cryocooler |
Cooling Type | Air Cooled |
Voltage | 220V/1Ph/50Hz |
Controller | PLC |
PLC Brand | Siemens |
Screen | Color 10'' HMI |
Noise | <60 dB(a) @ 1 meter |
Automatic Running | Yes |
Automatic Standby | Yes |
Liquid Nitrogen Dispensing | Touch Screen Dispensing |
WiFi Connection | Yes |
Remote Control | Yes |
Lot Function | Yes |
Dimension | 150x75x175cm |
Weight | 500kg |
Cooling Water Requirement | No |
Place of Origin | Hangzhou, China |
Mobility | Yes |
Lead Time | 8 Weeks |
Machinery test report | Yes |
Quality Assurance | Yes |