One End Sealed Quartz Tube Fused Silica Tube OD 4mm ID 2mm Length 35mm Micro Sample Vessel

The One-End Sealed Fused Silica Tube is a precision miniature vessel with an outer diameter of 4mm, an inner diameter of 2mm and a total length of 35mm, with one end hermetically heat-sealed. The tube is integrally formed from high-purity fused silica, and the sealed end is free of cracks and pores, providing a reliable closed chamber for micro samples. The uniform transparent tube wall delivers excellent UV transmittance, while the ultra-low thermal expansion coefficient ensures resistance to high temperature and acid and alkali. With anti-cracking behavior under temperature alternation and long-lasting sealing performance, the tube is a dependable component for laboratory and optical applications.

• Integrally heat-sealed high-purity fused silica: The one-piece sealed structure provides a reliable closed chamber.
• Crack and pore free at sealed end: The defect-free seal maintains airtight integrity for sample containment.
• Uniform transparent tube wall: Excellent UV transmittance supports spectral and optical measurements.
• Ultra-low thermal expansion: High temperature and acid and alkali resistance keep the tube stable in severe conditions.
• Long-lasting sealing performance: Anti-cracking under temperature alternation ensures durable, leak-free service.

The One-End Sealed Fused Silica Tube is designed for miniature sample handling and optical testing systems that require an inert, sealed chamber. It is widely used as a sealed micro sample reaction tube, containing small volumes of reactants without contamination. In illumination systems, the tube serves as a liner for standard light sources, combining optical transparency with thermal durability. The component is also adopted as a specimen tube for spectral testing, providing a clean, UV-transparent path for analysis. In laboratory heating, it functions as a high-temperature heating vessel, withstanding thermal cycling without cracking. Additionally, the tube works as a sealed carrier tube for fluorescence detection, protecting samples while allowing reliable optical measurement.

• Smooth rounded sealed end without sharp edges: Safe handling and clean sealing without stress concentration.
• Precise dimensional machining: Accurate end-face dimensions ensure consistent fit in instrument holders.
• Airtight leakage-proof performance: The hermetic seal keeps samples stable, with no impurity precipitation under high temperature.
• Flexible surface treatment: Polishing, frosting and coating are available to match application requirements.