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| Brand Name: | yue lin sen |
| Model Number: | Y2251 |
| MOQ: | 100 pcs |
| Price: | 0.5-20 |
| Payment Terms: | T/T |
| Supply Ability: | 5000000pcs |
304 Stainless Steel Capillary Sandblasting Marking Puncture Needle
The 304 Stainless Steel Capillary Sandblasted Graduated Puncture Needle is a high-precision, dual-function instrument designed for applications requiring both accurate volumetric measurement and clean penetration. It is fabricated from 304 stainless steel capillary tubing, providing inherent strength and corrosion resistance. The needle undergoes a controlled sandblasting process, which creates a uniform, matte surface finish that enhances durability and provides an excellent substrate for clear, permanent laser-etched volume graduations. The precision-ground sharp tip ensures reliable puncture of septa or membranes. This combination of a sandblasted body, a clear measurement scale, and a fine capillary bore makes it an ideal tool for precise micro-volume fluid handling and transfer in demanding laboratory and industrial settings.
Capillary Tubing Preparation: Medical-grade 304 stainless steel capillary tubing is selected and cut to precise lengths. The internal lumen is ensured to be clean and smooth.
Sandblasting (Bead Blasting): The exterior surface of the needle is uniformly sandblasted using fine media (like glass beads or aluminum oxide) at controlled pressure. This process creates a consistent, non-reflective matte finish that improves grip and provides a textured surface for marking.
Laser Etching of Graduations: High-precision laser etching is performed directly onto the sandblasted surface. This creates permanent, high-contrast graduation marks (in µL, mL, or mm) and numerical indicators that are resistant to solvents and wear.
Tip Grinding & Sharpening: The distal end is precision-ground to form a sharp, beveled point (e.g., lancet style) suitable for piercing. The grinding is done with care to maintain the concentricity of the tip with the capillary bore.
Cleaning & Surface Passivation: Following the abrasive and marking processes, the needle undergoes thorough ultrasonic cleaning to remove all particulates. A chemical passivation treatment (per ASTM A967) is then applied to restore and enhance the corrosion resistance of the stainless steel.
Calibration Verification & Final Inspection: The accuracy of the etched graduations is verified against a traceable standard. Each needle is inspected for dimensional accuracy, graduation clarity, tip sharpness, and overall finish quality.
Gas Chromatography (GC) / Liquid Chromatography (LC): Precise manual injection of samples into injector ports, where the scale allows for accurate measurement of sample volume.
Micro-Syringe Applications: Serving as a durable and readable needle for micro-liter syringes used in chemical, pharmaceutical, and biological research.
Precision Fluid Dispensing: In industrial settings for applying exact micro-volumes of adhesives, lubricants, or reagents.
Laboratory Sample Preparation: For accurate transfer and aliquoting of small volumes of solvents, standards, or samples.
Educational Demonstrations: As a clear and robust tool for teaching principles of micro-volume measurement and fluid handling.
| Category | Parameter | Specification / Details |
|---|---|---|
| Material | Body Material | 304 Stainless Steel (AISI 304) |
| Properties | Good chemical resistance, mechanical strength, and durability. | |
| Capillary Dimensions | Outer Diameter (OD) | 0.5 mm, 0.7 mm, 1.0 mm, 1.5 mm (Typical) |
| Inner Diameter (ID) | 0.2 mm to 1.1 mm (Depending on OD and wall thickness) | |
| Wall Thickness | 0.15 mm to 0.25 mm | |
| Total Length | 50 mm, 80 mm, 100 mm, 150 mm (Common) | |
| Scale & Marking | Graduation Units | Microliters (µL), Millimetres (mm) |
| Scale Interval | 1 µL, 2 µL, 5 µL or 1 mm, 5 mm | |
| Scale Length | 20 mm to 80 mm of the total length | |
| Marking Method | Laser Etching onto sandblasted surface. Black or high-contrast marks. | |
| Scale Accuracy | Approximately ±2-5% of indicated volume (for reference). For critical use, calibration against delivered volume is recommended. | |
| Tip Design | Point Type | Sharp Lancet Point (Standard) |
| Bevel Angle | ~15-20 degrees | |
| Surface Finish | Body Finish | Uniform matte/satin finish from sandblasting. |
| Treatment | Chemically passivated for optimal corrosion resistance. | |
| Performance | Fluid Compatibility | Compatible with a wide range of aqueous solutions, many solvents, oils, and mild chemicals. (Verify compatibility for specific aggressive chemicals). |
| Puncture Function | Designed to pierce rubber septa, PTFE/silicone membranes, and similar materials. | |
| Quality & Packaging | Inspection | Visual inspection for finish uniformity, mark clarity, and tip quality. |
| Cleaning | Cleaned and packaged in a particle-controlled environment. | |
| Packaging | Typically packaged in protective plastic racks or sleeves to prevent damage. Supplied non-sterile. |
Address
Room 203, Building 2, Ande Alley, Changan Town, Dongguan City, Guangdong Province
Tel
86--13267262720
