This module replaces the electrode membrane. Simply unscrew the old one and screw on the new one. The membrane of a Calcium ISE electrode has a limited life span of one to two years, regardless of frequency of use. Do not order it until you need it, as it will age even when not in use.
All prices are for U.S. educators.
Educational use only: Vernier products are designed for educational use. They are not appropriate for industrial, medical, or commercial applications. Product usage disclaimer »