Ion-Selective Electrodes

Our family of Ion-Selective Electrodes are great for monitoring four environmentally-important ions: Calcium (Ca²⁺), Chloride (Cl^-), Ammonium (NH₄⁺) and Nitrate (NO₃^-).

Calcium Ion-Selective Electrode

This Vernier Ion-Selective Electrode can be used to measure the concentration of Calcium (Ca²⁺) in aqueous samples.

$179

ORDER CODECA-BTA

Chloride Ion-Selective Electrode

This Vernier Ion-Selective Electrode can be used to measure the concentration of Chloride (Cl_-) in aqueous samples.

$179

ORDER CODECL-BTA

Ammonium Ion-Selective Electrode

This Vernier Ion-Selective Electrode can be used to measure the concentration of Ammonium (NH₄⁺) in aqueous samples.

$179

ORDER CODENH4-BTA

Nitrate Ion-Selective Electrode

This Vernier Ion-Selective Electrode can be used to measure the concentration of Nitrate (NO₃^-) in aqueous samples.

$179

ORDER CODENO3-BTA

ISE Modules and Standards

Ion-Selective Electrodes require good chemical technique and careful calibration to obtain accurate results. They are not recommended for middle school or elementary students.

ISE Replacement Modules are available for Ammonium, Calcium, and Nitrate Ion-Selective Electrodes. Chloride does not need a replacement module.

Important: We recommend that you do not purchase ISE replacement modules too far in advance of their expected time of use; degradation occurs while replacement modules are stored on the shelf.