Rainin Capillary Piston 25 ul Pos-D Sterile - 3 Packs of 180 Pistons

Rainin 17008605 Sterile Pos-D Capillary Pistons, 25 ul

Designed expressly for the highly accurate pipetting of problematic liquids, the Rainin 25 ul Pos-D capillary pistons provide ultimate precision through positive displacement technology. Unlike traditional air-displacement tips, these disposable units feature an integrated piston that makes direct contact with the sample fluid, entirely eliminating the air cushion. This direct-contact mechanism is essential for dispensing dense, viscous, volatile, or high-vapor-pressure liquids that would otherwise cause standard pipettes to leak or deliver inaccurate volumes. Manufactured under stringent cleanroom conditions, these specialized capillary pistons are fully sterile and completely free of DNA, RNase, DNase, and ATP. Pre-assembled and ready to mount onto Rainin Pos-D positive displacement pipettes, this consumable ensures optimal volumetric accuracy while thoroughly protecting both the user and the instrument from hazardous aerosols and cross-contamination.

Technical Performance and Design

• Positive Displacement Mechanism: The internal piston directly displaces the liquid, compensating for the physical properties of heavy or volatile fluids to ensure absolute pipetting accuracy without pressure-induced dripping.

• Integrated Pre-assembled Design: Each unit combines a precisely molded plastic capillary tube with an internal piston, eliminating manual assembly time and reducing the risk of contamination before use.

• Aerosol and Cross-Contamination Prevention: Because there is no air space between the piston and the sample, biohazardous aerosols and radioactive vapors are contained, entirely preventing internal pipette contamination.

• Certified Sterile Production: Rigorously sterilized and certified free of biological contaminants, making them immediately deployable in highly sensitive genomic, forensic, and clinical diagnostic workflows.

Product Specifications

• Catalog Number: 17008605

• Volumetric Capacity: 25 ul

• Tip Technology: Capillary Piston (CP) / Positive Displacement

• Sterility Status: Sterile (DNase, RNase, and Pyrogen Free)

• Packaging Configuration: 3 Packs of 180 (540 Total Units)

Key Benefits & Applications

• Viscous Fluid Handling: Effortlessly and accurately dispenses thick solutions like glycerol, enzyme buffers, oils, and protein mixtures that cling to the walls of standard air-displacement tips.

• Volatile Solvent Pipetting: Prevents the spontaneous evaporation and subsequent dripping commonly experienced when handling high-vapor-pressure liquids such as ethanol, acetone, and chloroform.

• Molecular Biology and PCR: The sterile, aerosol-free environment guarantees that trace nucleic acids are not transferred between samples, safeguarding the integrity of highly amplified PCR assays.

• Corrosive Liquid Protection: Contains aggressive and caustic samples entirely within the disposable capillary tube, protecting the internal shafts and seals of the expensive positive displacement pipette.

All product names, logos, and brands are property of their respective owners.