The PU-4180 and 4185 pumps operate at pressures up to 70 MPa, designed mainly for use with RHPLC for core-shell columns or similar micro packing materials as well as working at pressures commonly used for conventional HPLC.
The PU-4285 UHPLC pump provides precise flow at pressures up to 130 MPa; for columns with particle sizes of less than 2 µm. The LC-4000 series UHPLC system can also be used for rapid analysis HPLC (RHPLC) and conventional HPLC.
PU-4080i and PU-4085i are manufactured by using polyetheretherketone (PEEK) instead of metal parts which may become exposed to fluids. This allows analyses without concern about sample decomposition or absorption caused by metal.
The PU-4180/85 and PU-4285 analytical pumps can be configured for both single pump gradient and multiple pump gradient operation.