The S 6020 is a stainless steel 2-position valve with needle injection port on the front side. The 6120 is the identical valve with inert PEEK stator. These valves feature the No-Flow-Interruption (NFI) technology which reduces pressure spikes during position switching to a minimum. The needle port can be used with standard microliter syringes (e.g. Hamilton) or plastic type syringes with 0.7mm needles. The S 6020/6120 have a built-in position sensor for starting data acquisition precisely at the point of injection. A variety of rotor seal materials are available to cover any type of application.