Product Number: E21M004
The Radiometer REF421 Reference Electrode has a glass body, calomel reference system, refillable electrolyte (sat. KCl), and porous pin junction. The REF421 reference probe can be used in a variety of sample types. The REF421 is a screw cap electrode and requires an external connection cable for connection to a meter.
To meet your analysis needs, Radiometer Analytical reference electrodes are available with a variety of reference systems and liquid junctions. There is a Radiometer electrode for every application.