![ISE Ammonium Replacement Module](https://educatec.ch/media/image/a5/60/16/VER_ReplacementModule_Preview_600x600.jpg)
- Order number: NH4-MOD
- Supplier Name: Vernier Science Education
- Supplier Number: NH4-MOD
- Warranty(Years): 2
This module replaces the electrode membrane. Simply unscrew the old one and screw on the new one. The membrane of an Ammonium 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.
![Vernier Science Education](https://educatec.ch/media/image/2f/c0/db/Vernier_Logo-06.png)
Celebrating its 35th anniversary in 2016, Vernier Software & Technology continues to be a leading innovator of scientific data-collection technology. Focused on science, technology, engineering, and mathematics (STEM), Vernier is dedicated to developing creative ways to teach and learn using hands-on science and math. Vernier creates easy-to-use and affordable science interfaces, sensors, and graphing/analysis software. With world-wide distribution to over 140 countries, Vernier products are used by educators and students from elementary school to college. Vernier’s technology-based solutions enhance STEM education, increase learning, and build students’ critical thinking skills. Vernier’s business culture is grounded in Earth-friendly policies and practices, and the company provides a family-friendly workplace.