Calcium ISE (Ca2+)

Product Code: PS-3518


This ISE connects to the Wireless pH Sensor and allows students to measure the concentration of Calcium ions in aqueous solutions.

This ISE utilizes a standard PVC membrane. As with all ISE implementing this design, the lifespan of the membrane is limited. For this reason, we offer replacement sensor modules (PVC matrix sensor type) which allow you to periodically replace the module, rather than the whole electrode.

PASCO Ion Selective Electrodes are industrial-quality probes that give excellent results when properly used. Operation of these Ion Selective Electrodes assumes training in the safe handling of flammable, caustic and corrosive chemicals and a working knowledge of serial dilution and calibration procedures. For this reason, they are not recommended for use by elementary or middle school students.

What’s Included

  • Calcium ISE (Ca2+) Probe
  • Calcium ISE Replacement Module
  • BNC Male-to-Female Cable
  • Calcium Standard Solution 1000 ppm
  • Calcium Reference Fill Solution
  • Storage Bottle 3 Calcium Ionic Strength Adjuster (ISA)


Range 1 to 40,000 ppm or mg/L
pH range 2-8
Electrode slope 26 ± 2 mV/ decade
Interfering ions Pb2+, Hg2+, Si2+, Fe2+, Cu2+, Ni2+, NH3, Na+, Li+, Tris+, K+, Ba2+, Zn2+, Mg2+
Electrode type PVC Membrane

Supporting Documents

Calcium ISE Probe Manual

Safety Sheets

Calcium ISE – Safety Data Sheet

Calcium Reference Fill Solution – Safety Data Sheet

Calcium Standard Solution – Safety Data Sheet