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METTLER TOLEDO™ Ion Selective Electrodes (ISE)

A selection of ISE probes for detecting concentration of various free ions.

Manufacturer:  METTLER TOLEDO™ 51344715

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Catalog No. 01-928-245



  • Prior to first use, rinse the electrode with distilled water and soak it in the appropriate standard for 24-48 hours and then fill with reference electrolyte (refer to table above)
  • ISA (Ionic strength adjuster) solution required to be added to all calibration standards and samples prior to measurement for accurate results
  • Refer to electrode user manual for appropriate ratio of ISA solution to sample volume
  • Add filling solution each day before using the electrode (at least 2.5 cm above sample level in beaker)
  • Be sure to screw cap tightly immediately after use
  • The filling solution inside the electrode should not be allowed to evaporate, as crystallization will result
  • For storage between measurements and up to three days, store in the appropriate standard
  • For long-term storage, refer to specific ISE electrode user manual
  • Sensing membrane will wear over time; each membrane can last about six months with normal use, but actual lifespan will depend on the type of samples that are being measured
  • Competing ion interferences are common. Refer to ISE electrode user manual for potential interferences
  • Compatible with METTLER TOLEDO SevenExcellence Benchtop, Seven2Go, and SevenGo Portable
  • Compatible with InMotion Autosampler to automate measurement and cleaning of up to 303 samples


For determination of Fluoride ions
Ion Electrolyte A
3.9 ft.
1.2 m
32° to 176°F
4.5 to 5.5
Solid state
Ion-Selective Electrode
0.02 mg/ - saturated solution
Fixed 1.2 m BNC Cable
4.75 in.
120 mm
Epoxy Shaft
Required Solutions: Reference Electrolyte Ion Electrolyte A - 51344750 Ionic Strength Adjuster - 51344766
Ca2+, F-, S2-
perfectION FI- Combination Electrode
0° to 80°C
Product Certifications