ramé-hart
Custom Coaxial and Triaxial Needles

ramé-hart fabricates a variety of custom coaxial and triaxial needles for a wide spectrum of special applications. Shafting is precision Type 304 Stainless Steel while the Luer connector is nickel and chrome-plated brass. These needles are autoclavable; they can be cleaned, washed, boiled, sterilized, and reused many times.

The schematic above shows how two separate gases or liquids pass through the coaxial needle.

(3) Coaxial Needles - Style B

Style A, Dim A is 100mm, and Dim B is 60mm on this Coaxial Needle

Dim C is 0 on these Coaxial Needles

Coaxial Needles with Style B Connector

Above is a Coaxial Needle and below is a Triaxial Needle - all with Style B

Coaxial Needle with extended inner needle (Dim C > 0) and Style B

Coaxial Needle with Style A Connector

To get started with your own coaxial needle design, download the needle chart here: http://www.ramehart.com/pdf/needles.pdf This chart shows the ID (inside) and OD (outside diameters) for all standard needle gauges. Be sure that the OD of the inside needle you choose is smaller than the ID of the outside needle.

Next, download our coaxial needle design worksheet here: http://www.ramehart.com/pdf/coaxial_worksheet.pdf Figure out your inside and outside gauges along with connector type for the side fitting (A or B style). Figure out the other dimensions per your requirements as indicated on the worksheet.

Then contact us with all of the information from the worksheet and how many needles you need and we will provide you with a quotation including price and delivery. You send us your own sketch if you require something special.
 

For more information or a quotation, please contact us
or call 973-448-0305
To purchase spare parts, please visit www.ramehartstore.com
©2012, ramé-hart instrument co. All rights reserved.