Because most capillary tubing connections are made into coned receiving ports, where the port is not designed to be used with capillary tubing directly, special care must be used to ensure a good connection. While custom ferrules can help make these connections, they only offer a fixedlength nose—and because most tubing pockets will vary slightly in length, this can lead to leaking or dead volume.
To help save overall expense while maintaining a concentric connection with minimal dead volume, IDEX Health Science recommends the use of sleeves. Because sleeves are not permanently attached to a ferrule, they can easily adapt to varying tubing pocket depths. Additionally, because they are manufactured using Upchurch Scientific extruder polymer tubing, you are assured of the concentricity of the resultant connection.
1/16" OD Tubing Sleeves
These sleeves require a wrench tightened nut to achieve proper sealing. We recommend the hex-head SealTight™ Fittings. Many researches also use a stainless steel nut and ferrule with these sleeves, such as our U-400 and U-401 in Stainless Steel Fittings.
Use 1/32" OD PEEK or FEP sleeves to connect capillary tubing with the following: