Waters 700009641 ESI Probe Assembly 250mmWaters 700009641 ESI Probe Assembly 250mm The Waters 700009641 ESI Probe Assembly 250mm is a precision electrospray ionization (ESI) probe designed for use in liquid chromatographymass spectrometry (LC MS) systems. This 250 mm probe assembly enables stable and efficient ionization of analytes, supporting high sensitivity mass spectrometric detection in analytical laboratories. Engineered for compatibility with Waters LC MS platforms, the probe