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.
Educational use only: Vernier products are designed for educational use. They are not appropriate for industrial, medical, or commercial applications.
* AP and Advanced Placement Program are registered trademarks of the College Entrance Examination Board, which was not involved in the production of and does not endorse this product.
** The IB Diploma Program is an official program of the International Baccalaureate Organization (IBO) which authorizes schools to offer it. The material available here has been developed independently of the IBO and is not endorsed by it.