Beishide BSD-LN Electric Turbo Liquid Nitrogen Pump
| Brand | Beishide Instrument |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Regional Category | Domestic (China) |
| Model | BSD-LN |
| Pricing | Upon Request |
Overview
The Beishide BSD-LN Electric Turbo Liquid Nitrogen Pump is a purpose-engineered cryogenic transfer device designed for precise, contamination-free, and operator-safe delivery of liquid nitrogen (LN₂) in laboratory and industrial material characterization environments. Unlike conventional pneumatic or pressure-driven LN₂ transfer systems, the BSD-LN employs a fully electric, hermetically sealed turbo impeller mechanism operating directly within the cryogenic fluid path. This design eliminates reliance on compressed air or external pressurization—thereby removing risks associated with over-pressurization, seal failure, gas-phase entrainment, and sample contamination. The pump operates on a principle of controlled centrifugal acceleration: the high-efficiency turbine rotor—fabricated from low-thermal-conductivity, cryo-compatible alloys—rotates at variable speeds to generate continuous, pulseless flow with immediate start/stop response and zero overshoot. It is specifically integrated into surface and interface property testing workflows, including but not limited to BET surface area analysis, mercury intrusion porosimetry support systems, and low-temperature thermal desorption stages where purity, repeatability, and positional flexibility are critical.
Key Features
- Electric turbo-driven architecture: No compressed air supply required; eliminates gas-phase contamination and pressure-related safety hazards.
- Infinitely adjustable flow rate: 0–2.25 L/min, digitally regulated via ergonomic push-button interface with real-time feedback.
- Self-contained power system: Integrated high-capacity lithium battery with state-of-charge display; supports >200 L total LN₂ transfer per full charge.
- Portable modular design: Equipped with silent omnidirectional casters and low-profile static base—enables unrestricted movement across lab floors without fixed electrical infrastructure.
- Cryo-optimized fluid path: Pump shaft length standard at 52 cm (custom lengths available); uses ultra-flexible, low-brittle cryogenic tubing and multi-layer vacuum-insulated transfer lines rated for sustained −196 °C operation.
- Standard 30 L Dewar compatibility: 50 mm neck diameter, optimized for seamless coupling with common surface area and porosity analyzers (e.g., gas sorption systems requiring LN₂ cooling baths).
Sample Compatibility & Compliance
The BSD-LN is compatible with all standard liquid nitrogen storage vessels conforming to ISO 21028-1 (cryogenic vessel safety) and ASTM F2781 (low-temperature fluid handling). Its non-invasive, seal-free pumping mechanism ensures no introduction of ambient moisture, oxygen, or hydrocarbon contaminants—critical for maintaining integrity in high-vacuum surface analysis protocols (e.g., ISO 9277, ASTM D3663, and IUPAC-recommended BET measurement conditions). The device meets CE marking requirements for electromagnetic compatibility (EN 61326-1) and low-voltage safety (EN 61000-6-3), and its battery management system complies with UN 38.3 transport regulations for lithium-ion cells. While not a medical or pharmaceutical-grade instrument, its operational traceability (via battery cycle logging and actuation timestamping) supports GLP-aligned documentation practices in QA/QC laboratories.
Software & Data Management
The BSD-LN operates as a standalone hardware unit with no embedded firmware or cloud connectivity. Flow control, start/stop activation, and battery status are managed exclusively through tactile push-button inputs and an integrated OLED status indicator. For integration into automated test sequences, optional dry-contact I/O ports (24 V DC, opto-isolated) are available upon request—enabling synchronization with gas sorption analyzers, temperature controllers, or LabVIEW-based acquisition platforms. All operational parameters—including cumulative LN₂ volume dispensed (calculated via calibrated turbine RPM-to-flow mapping)—can be logged externally using third-party data loggers compliant with ISO/IEC 17025 traceability standards.
Applications
- Primary cooling fluid supply for volumetric gas sorption analyzers (BET, BJH, t-plot) requiring stable, high-purity LN₂ baths.
- Support system for low-temperature thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) where rapid, reproducible cryogen delivery is essential.
- On-demand LN₂ replenishment in mercury intrusion porosimeters and cryo-microtome preparation stations.
- Mobile cryogenic logistics in multi-instrument core facilities—eliminating need for centralized LN₂ distribution manifolds or pressurized piping networks.
- Field-deployable support for portable surface characterization units used in materials R&D, catalysis screening, and battery electrode porosity validation.
FAQ
Does the BSD-LN require connection to a wall outlet?
No. It operates entirely on its internal rechargeable lithium battery—no AC power cord or fixed socket is needed.
Can the pump introduce air or moisture into the liquid nitrogen?
No. The absence of pneumatic components and pressure seals prevents ambient gas ingress, preserving LN₂ purity for sensitive surface analysis.
Is the pump compatible with non-standard Dewar sizes or neck diameters?
Yes. Standard configuration includes a 50 mm neck adapter; custom flanges, extended shafts (beyond 52 cm), and alternative insulation packages are available under OEM engineering support.
What maintenance is required for long-term reliability?
Annual inspection of turbine bearing preload and cryo-tubing integrity is recommended; no lubrication or seal replacement is necessary due to the dry, non-contact impeller design.
How is flow rate accuracy validated?
Each unit undergoes factory calibration against NIST-traceable volumetric flow standards at −196 °C using gravimetric LN₂ collection methods per ASTM E2877 guidelines.
