Noblegen Callisto LN Series On-Site Liquid Nitrogen Generator

Overview

The Noblegen Callisto LN Series is an on-site, membrane-based liquid nitrogen generator engineered for continuous, reliable production of high-purity liquid nitrogen (LN₂) directly within laboratory and clinical environments. Unlike conventional dewar-based supply or bulk delivery systems, the Callisto employs a two-cabinet modular architecture integrating compressed air pretreatment, pressure swing adsorption (PSA) nitrogen generation, cryogenic liquefaction via Joule–Thomson expansion, and integrated vacuum-insulated storage. This closed-loop system eliminates reliance on external LN₂ logistics while maintaining consistent output at ≥99.999% N₂ purity (O₂ < 1 ppm, H₂O < 1 ppm), meeting ISO 8573-1 Class 1 compressed air specifications and USP requirements for pharmaceutical-grade nitrogen. Designed for seamless integration into GLP-compliant and ISO 13485-certified workflows, the Callisto delivers stable, on-demand liquid nitrogen at rates scalable from 10 to 50 L/day—sufficient to support routine cryopreservation, IVF embryo banking, biobanking infrastructure, and low-temperature semiconductor characterization.

Key Features

• Modular dual-cabinet design: Separates gas generation and liquefaction/storage modules for optimized thermal management, service accessibility, and footprint reduction (total floor space < 1.8 m²).
• NPFS™ Nitrogen Pulse Flow System: Patented pulsed liquefaction cycle minimizes thermal cycling stress on cryo-components, extending compressor and heat exchanger service life beyond 20,000 operating hours.
• Vacuum-protected cryostat with multi-layer superinsulation: Achieves ≤0.8 L/day evaporation loss under static conditions—reducing replenishment frequency by >90% versus conventional Dewars.
• Integrated oxygen analyzer with real-time digital readout: Continuously monitors O₂ concentration in both gaseous and liquid phases; triggers automatic shutdown if O₂ exceeds 2 ppm (configurable threshold).
• Medical-grade sterile filtration: 0.01 µm hydrophobic membrane filter installed downstream of liquefaction ensures end-product sterility compliant with ISO 14644-1 Class 5 cleanroom standards.
• Intuitive 7-inch color touchscreen HMI: Provides live visualization of liquefaction efficiency, tank level (±0.5% full-scale accuracy), inlet air dew point, and system fault diagnostics with timestamped event logging.

Sample Compatibility & Compliance

The Callisto LN Series is validated for compatibility with primary and secondary cryogenic containers including 10–50 L portable liquid nitrogen tanks, automated cryostorage racks (e.g., MVE CryoCube, Chart MVE Variocube), and IVF vitrification workstations. All wetted components contact only electropolished 316L stainless steel or fluoropolymer-lined surfaces, ensuring extractables-free operation per USP . The system meets CE marking requirements under the EU Machinery Directive 2006/42/EC and Pressure Equipment Directive 2014/68/EU. Full audit trail capability—including user login history, parameter change logs, and alarm acknowledgments—is enabled for FDA 21 CFR Part 11 compliance when paired with optional secure network authentication modules.

Software & Data Management

Embedded firmware supports local data retention for ≥12 months of operational metrics (liquefaction rate, energy consumption/kL, purity trends). Optional Ethernet/Wi-Fi connectivity enables remote monitoring via RESTful API endpoints compatible with LabVantage, STARLIMS, and custom LIMS integrations. All data exports are timestamped, digitally signed, and formatted as CSV or JSON—preserving integrity for regulatory submissions. Firmware updates follow IEC 62304 Class B software lifecycle standards, with version-controlled release notes traceable to ISO/IEC 17025-accredited validation reports.

Applications

• Cryopreservation of human oocytes, embryos, and somatic cells in IVF clinics and reproductive medicine centers.
• Long-term storage of cell lines, primary tissues, and microbial strains in biobanks adhering to ISBER Best Practices.
• Controlled-rate freezing protocols for CAR-T and stem cell manufacturing under GMP Annex 1 guidelines.
• Low-temperature electron microscopy sample preparation requiring ultra-dry, particle-free LN₂.
• Calibration of cryogenic sensors and thermocouples in metrology laboratories accredited to ISO/IEC 17025.
• Semiconductor wafer testing at 77 K where nitrogen purity directly impacts carrier mobility measurements.

FAQ

What is the minimum ambient temperature requirement for stable operation?
The Callisto LN Series operates continuously within an ambient range of 15–32 °C and relative humidity ≤70% non-condensing. Below 15 °C, optional heater kits maintain dew point control in the air prep module.
Can the system be integrated with existing liquid nitrogen distribution piping?
Yes—standardized 3/8″ VCR fittings allow direct connection to validated stainless steel distribution manifolds; flow rate throttling valves are supplied for pressure matching.
How often does the oxygen analyzer require calibration?
Factory-calibrated electrochemical O₂ sensors maintain ±0.1 ppm accuracy for 12 months; annual recalibration using NIST-traceable zero/span gases is recommended.
Is remote diagnostic support available?
PEAK’s certified field engineers provide Tier-3 remote troubleshooting via encrypted VNC sessions with prior written authorization per GDPR and HIPAA-compliant data handling protocols.
Does the system meet ISO 14644-1 Class 5 for cleanroom-compatible installation?
Yes—the entire unit achieves ISO 14644-1 Class 5 particulate counts at outlet when operated with HEPA-filtered intake air and sterile final filtration; installation qualification (IQ) documentation is provided.