Switching and injection valves by KNAUER have impressive performance data and an outstanding long-term stability. The valve is equipped with a REED contact that is closed (magnetically controlled) during injection. The start signal can be easily started with an integrator or HPLC software. The recommended sample loops are also suitable for partial filling due to the fact that they flow in the reverse direction when injected (filled). In turn, this aids in the minimization of peak broadening.