Ion-Selective Electrode: For a Wide Range of ISE Applications

Ion-Selective Electrode

Combined and Half-Cells ISE for Reliable Ion Measurement

Meters

pH Meters

To fit your electrochemistry system needs, we offer a variety of benchtop and portable meters that are professional and durable. Our portfolio offers products designed for compliance, routine measurements or anyone working on a tight budget.

Benchtop MetersPortable Meters

Solutions

pH Solutions

METTLER TOLEDO offers a comprehensive range of top quality buffers, standards, electrolytes, cleaning and verification solutions for determination of pH, conductivity, ion concentration, ORP and dissolved oxygen.All solutions are available in small volume bottles either in packs or single and single use sachets.

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Service

Service for pH meters and sensors

We offer different service packages depending on your needs. These range from professional on-site installation and configuration to documented proof of compliancy. If full coverage beyond initial warranty is desired, we offer an extended care package in the form of preventive maintenance and repair.

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Analytical Instruments

Products and Specs

 
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Measuring range
Temperature Range
Optimal pH range
Connector
Type of junction
Material No.: 51107673
Measuring range1*10-6 – 1 mol/L ;
Temperature Range 0 °C – 50 °C ;
Optimal pH range2 – 9 ;
ConnectorS7 ;
Type of junction-- ;
Shaft MaterialPOM/PVC ;
Sensor TypeHalf-cell ;
Shaft length120 mm ;
Shaft Diameter 12 mm ;
ParameterISE ;
Reference electrolyte3 mol/L KCl ;
Type of membranePolymer ;
ISMNo ;
Temperature probeNo ;
Signal typeAnalog ;
IonLithium ;
Reference electrolyte Order no.51343180 ;
ISA solution0.5 mol/L MgSO4 ;
Membrane kit51107687 ;
Cable (Length)
Material No.: 51340900
Measuring range4*10-7 – 1 mol/L ;
Temperature Range 0 °C – 50 °C ;
Optimal pH range2 – 9 ;
ConnectorS7 ;
Type of junction-- ;
Shaft MaterialPOM/PVC ;
Sensor TypeHalf-cell ;
Shaft length120 mm ;
Shaft Diameter 12 mm ;
ParameterISE ;
Reference electrolyte2 mol/L MgSO4 ;
Type of membranePolymer ;
ISMNo ;
Temperature probeNo ;
Signal typeAnalog ;
IonAmmonium ;
Reference electrolyte Order no.2mol/L MgSO4 ;
ISA solution0.5 mol/L MgSO4 ;
Membrane kit51340012 ;
Cable (Length)
Material No.: 51340500
Measuring range5*10-7 – 1 mol/L ;
Temperature Range 0 °C – 80 °C ;
Optimal pH range4 – 10 ;
ConnectorS7 ;
Type of junction-- ;
Shaft MaterialPOM ;
Sensor TypeHalf-cell ;
Shaft length120 mm ;
Shaft Diameter 12 mm ;
ParameterISE ;
Reference electrolyte3 mol/L KCl ;
Type of membraneSolid state ;
ISMNo ;
Temperature probeNo ;
Signal typeAnalog ;
IonFluoride ;
Reference electrolyte Order no.51343180 ;
ISA solutionTISAB III ;
Membrane kit51340008 ;
Cable (Length)
Material No.: 51340263
Measuring range1*10-7 – 1 mol/L ;
Temperature Range 0 °C – 80 °C ;
Optimal pH range8 – 11 ;
ConnectorS7 ;
Type of junction-- ;
Shaft MaterialGlass ;
Sensor TypeHalf-cell ;
Shaft length120 mm ;
Shaft Diameter 12 mm ;
ParameterISE ;
Reference electrolyte0.1 mol/L NH4Cl ;
Type of membraneNa+-Glass ;
ISMNo ;
Temperature probeNo ;
Signal typeAnalog ;
IonSodium ;
Reference electrolyte Order no.0.1 mol/L NH4Cl ;
ISA solutionNH4Cl / NH4OH ;
Membrane kit
Cable (Length)
Material No.: 51107684
Measuring rangeno direct measurement ;
Temperature Range 0 °C – 50 °C ;
Optimal pH range4 – 12 ;
ConnectorS7 ;
Type of junction-- ;
Shaft MaterialPOM/PVC ;
Sensor TypeHalf-cell ;
Shaft length120 mm ;
Shaft Diameter 12 mm ;
ParameterISE ;
Reference electrolyte
Type of membranePolymer ;
ISMNo ;
Temperature probeNo ;
Signal typeAnalog ;
IonMagnesium ;
Reference electrolyte Order no.2mol/L MgSO4 ;
ISA solution
Membrane kit
Cable (Length)
Material No.: 51107681
Measuring range2*10-6 – 1 mol/L ;
Temperature Range 0 °C – 80 °C ;
Optimal pH range4 – 13 ;
ConnectorS7 ;
Type of junction-- ;
Shaft MaterialPOM ;
Sensor TypeHalf-cell ;
Shaft length120 mm ;
Shaft Diameter 12 mm ;
ParameterISE ;
Reference electrolyte1 mol/L KNO3 ;
Type of membraneSolid state ;
ISMNo ;
Temperature probeNo ;
Signal typeAnalog ;
IonCyanide ;
Reference electrolyte Order no.51343182 ;
ISA solution10 mol/L NaOH ;
Membrane kit51107695 ;
Cable (Length)
Material No.: 51107675
Measuring range1*10-8 – 1 mol/L ;
Temperature Range 0 °C – 80 °C ;
Optimal pH range4 – 13 ;
ConnectorS7 ;
Type of junction-- ;
Shaft MaterialPOM ;
Sensor TypeHalf-cell ;
Shaft length120 mm ;
Shaft Diameter 12 mm ;
ParameterISE ;
Reference electrolyte1 mol/L KNO3 ;
Type of membraneSolid state ;
ISMNo ;
Temperature probeNo ;
Signal typeAnalog ;
IonSulfide ;
Reference electrolyte Order no.51343182 ;
ISA solution10 mol/L NaOH ;
Membrane kit51107689 ;
Cable (Length)
Material No.: 51340400
Measuring range2*10-5 – 1 mol/L ;
Temperature Range 0 °C – 80 °C ;
Optimal pH range2 – 13 ;
ConnectorS7 ;
Type of junction-- ;
Shaft MaterialPOM ;
Sensor TypeHalf-cell ;
Shaft length120 mm ;
Shaft Diameter 12 mm ;
ParameterISE ;
Reference electrolyte1 mol/L KNO3 ;
Type of membraneSolid state ;
ISMNo ;
Temperature probeNo ;
Signal typeAnalog ;
IonChloride ;
Reference electrolyte Order no.51343182 ;
ISA solution1 mol/L KNO3 ;
Membrane kit51340007 ;
Cable (Length)
Material No.: 51340700
Measuring range1*10-6 – 1 mol/L ;
Temperature Range 0 °C – 50 °C ;
Optimal pH range2 – 12 ;
ConnectorS7 ;
Type of junction-- ;
Shaft MaterialPOM/PVC ;
Sensor TypeHalf-cell ;
Shaft length120 mm ;
Shaft Diameter 12 mm ;
ParameterISE ;
Reference electrolyte2 mol/L MgSO4 ;
Type of membranePolymer ;
ISMNo ;
Temperature probeNo ;
Signal typeAnalog ;
IonPotassium ;
Reference electrolyte Order no.2mol/L MgSO4 ;
ISA solution0.5 mol/L MgSO4 ;
Membrane kit51340010 ;
Cable (Length)
Material No.: 51340600
Measuring range1*10-6 – 1 mol/L ;
Temperature Range 0 °C – 50 °C ;
Optimal pH range2 – 12 ;
ConnectorS7 ;
Type of junction-- ;
Shaft MaterialPOM/PVC ;
Sensor TypeHalf-cell ;
Shaft length120 mm ;
Shaft Diameter 12 mm ;
ParameterISE ;
Reference electrolyte2 mol/L MgSO4 ;
Type of membranePolymer ;
ISMNo ;
Temperature probeNo ;
Signal typeAnalog ;
IonCalcium ;
Reference electrolyte Order no.51343180 ;
ISA solution3 mol/L KCl ;
Membrane kit51340009 ;
Cable (Length)
Material No.: 51107870
Measuring range2*10-6 – 1 mol/L ;
Temperature Range 0 °C – 80 °C ;
Optimal pH range2 – 10 ;
ConnectorS7 ;
Type of junction-- ;
Shaft MaterialPOM ;
Sensor TypeHalf-cell ;
Shaft length120 mm ;
Shaft Diameter 12 mm ;
ParameterISE ;
Reference electrolyte1 mol/L KNO3 ;
Type of membraneSolid state ;
ISMNo ;
Temperature probeNo ;
Signal typeAnalog ;
IonThiocyanate ;
Reference electrolyte Order no.51343182 ;
ISA solution1 mol/L KNO3 ;
Membrane kit51107871 ;
Cable (Length)
Material No.: 51340800
Measuring range3 *10-5 – 1 mol/L ;
Temperature Range 0 °C – 50 °C ;
Optimal pH range2 – 12 ;
ConnectorS7 ;
Type of junction-- ;
Shaft MaterialPOM/PVC ;
Sensor TypeHalf-cell ;
Shaft length120 mm ;
Shaft Diameter 12 mm ;
ParameterISE ;
Reference electrolyte2 mol/L MgSO4 ;
Type of membranePolymer ;
ISMNo ;
Temperature probeNo ;
Signal typeAnalog ;
IonNitrate ;
Reference electrolyte Order no.2mol/L MgSO4 ;
ISA solution0.5 mol/L MgSO4 ;
Membrane kit51340011 ;
Cable (Length)
Material No.: 51107678
Measuring range1*10-5 – 1 mol/L ;
Temperature Range 0 °C – 80 °C ;
Optimal pH range2 – 8 ;
ConnectorS7 ;
Type of junction-- ;
Shaft MaterialPOM ;
Sensor TypeHalf-cell ;
Shaft length120 mm ;
Shaft Diameter 12 mm ;
ParameterISE ;
Reference electrolyte1 mol/L KNO3 ;
Type of membraneSolid state ;
ISMNo ;
Temperature probeNo ;
Signal typeAnalog ;
IonCopper ;
Reference electrolyte Order no.51343182 ;
ISA solution1 mol/L KNO3 ;
Membrane kit51107692 ;
Cable (Length)
Material No.: 51340300
Measuring range1*10-6 – 1 mol/L ;
Temperature Range 0 °C – 80 °C ;
Optimal pH range2 – 13 ;
ConnectorS7 ;
Type of junction-- ;
Shaft MaterialPOM ;
Sensor TypeHalf-cell ;
Shaft length120 mm ;
Shaft Diameter 12 mm ;
ParameterISE ;
Reference electrolyte1 mol/L KNO3 ;
Type of membraneSolid state ;
ISMNo ;
Temperature probeNo ;
Signal typeAnalog ;
IonBromide ;
Reference electrolyte Order no.51343182 ;
ISA solution1 mol/L KNO3 ;
Membrane kit51340006 ;
Cable (Length)
Material No.: 51107676
Measuring range3*10-7 – 1 mol/L ;
Temperature Range 0 °C – 50 °C ;
Optimal pH range2 – 12 ;
ConnectorS7 ;
Type of junction-- ;
Shaft MaterialPOM/PVC ;
Sensor TypeHalf-cell ;
Shaft length120 mm ;
Shaft Diameter 12 mm ;
ParameterISE ;
Reference electrolyte2 mol/L MgSO4 ;
Type of membranePolymer ;
ISMNo ;
Temperature probeNo ;
Signal typeAnalog ;
IonFluoroborate ;
Reference electrolyte Order no.2mol/L MgSO4 ;
ISA solution0.5 mol/L MgSO4 ;
Membrane kit51107690 ;
Cable (Length)
Material No.: 51107672
Measuring range1*10-6 – 1 mol/L ;
Temperature Range 0 °C – 50 °C ;
Optimal pH range2 – 8 ;
ConnectorS7 ;
Type of junction-- ;
Shaft MaterialPOM/PVC ;
Sensor TypeHalf-cell ;
Shaft length120 mm ;
Shaft Diameter 12 mm ;
ParameterISE ;
Reference electrolyte1 mol/L KNO3 ;
Type of membranePolymer ;
ISMNo ;
Temperature probeNo ;
Signal typeAnalog ;
IonCadmium ;
Reference electrolyte Order no.51343182 ;
ISA solution1 mol/L KNO3 ;
Membrane kit51107686 ;
Cable (Length)
Material No.: 51107680
Measuring range2*10-8 – 1 mol/L ;
Temperature Range 0 °C – 80 °C ;
Optimal pH range1 – 13 ;
ConnectorS7 ;
Type of junction-- ;
Shaft MaterialPOM ;
Sensor TypeHalf-cell ;
Shaft length120 mm ;
Shaft Diameter 12 mm ;
ParameterISE ;
Reference electrolyte1 mol/L KNO3 ;
Type of membraneSolid state ;
ISMNo ;
Temperature probeNo ;
Signal typeAnalog ;
IonIodide ;
Reference electrolyte Order no.51343182 ;
ISA solution1 mol/L KNO3 ;
Membrane kit51107694 ;
Cable (Length)
Material No.: 51107674
Measuring range4*10-7 – 1 mol/L ;
Temperature Range 0 °C – 50 °C ;
Optimal pH range2 – 12 ;
ConnectorS7 ;
Type of junction-- ;
Shaft MaterialPOM/PVC ;
Sensor TypeHalf-cell ;
Shaft length120 mm ;
Shaft Diameter 12 mm ;
ParameterISE ;
Reference electrolyte3 mol/L KCl ;
Type of membranePolymer ;
ISMNo ;
Temperature probeNo ;
Signal typeAnalog ;
IonBarium ;
Reference electrolyte Order no.51343180 ;
ISA solution1 mol/L TRIS HCl ;
Membrane kit51107688 ;
Cable (Length)
Material No.: 51107873
Measuring range3*10-6 – 1 mol/L ;
Temperature Range 0 °C – 50 °C ;
Optimal pH range2 – 8 ;
ConnectorS7 ;
Type of junction-- ;
Shaft MaterialPOM/PVC ;
Sensor TypeHalf-cell ;
Shaft length120 mm ;
Shaft Diameter 12 mm ;
ParameterISE ;
Reference electrolyte1 mol/L KNO3 ;
Type of membranePolymer ;
ISMNo ;
Temperature probeNo ;
Signal typeAnalog ;
IonLead ;
Reference electrolyte Order no.51343182 ;
ISA solution1 mol/L KNO3 ;
Membrane kit51107874 ;
Cable (Length)
Material No.: 51341000
Measuring range1*10-6 – 5*10-2 mol/L ;
Temperature Range 0 °C – 50 °C ;
Optimal pH range11 – 14 ;
ConnectorS7 ;
Type of junction-- ;
Shaft MaterialPPS ;
Sensor TypeHalf-cell ;
Shaft length120 mm ;
Shaft Diameter 12 mm ;
ParameterGSE ;
Reference electrolyte
Type of membranePolymer ;
ISMNo ;
Temperature probeNo ;
Signal typeAnalog ;
IonAmmonia (gas) ;
Reference electrolyte Order no.
ISA solution
Membrane kit
Cable (Length)
Material No.: 51344830
Measuring range0.2 – 20700 mg/L ;
Temperature Range 0 °C – 80 °C ;
Optimal pH range4 – 7 ;
ConnectorLemo ;
Type of junctionClick & Clear™ ;
Shaft MaterialEpoxy ;
Sensor TypeCombined electrode ;
Shaft length120 mm ;
Shaft Diameter 12 mm ;
ParameterISE ;
Reference electrolyteIon Electrolyte B ;
Type of membraneSolid state ;
ISMNo ;
Temperature probeNo ;
Signal typeAnalog ;
IonLead ;
Reference electrolyte Order no.51344751 ;
ISA solution5 mol/L NaClO4 ;
Membrane kit
Cable (Length) 1.2 m ;
Comparison

Documentation

Product Brochures

InLab® Sensors
The manufacturing of high quality sensors with outstanding performance not only requires technical skills and expertise but also a profound understand...

Competence

Fluoride Ion Selective Electrode
Download a free copy of the Fluoride Ion Selective Electrode Application Guide and get more information about theory, principle and calibration for th...
Ion Selective Electrode Guide
Receive a free copy of the Ion Selective Electrode Guide and get useful tips and hints for selected ISE applications in various industrial segments. L...

Services

800 METTLER (800 638 8537)
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Explore our Services - Tailored to Fit your Equipment

We support and service your measurement equipment through its entire life-cycle, from installation to preventive maintenance and calibration to equipment repair.

Performance
Maintenance & Optimization
Expertise
Training & Consulting

FAQ

How to store Ion Selective Electrodes correctly?

All user manuals come with the necessary information about the short and long term storage of the respective sensor. Generally Ion Selective Electrodes should be stored dry for long term storage.

What response time is reasonable for an ion selective electrode?

The response time depends on the type of ion as well as its concentration.

Whereas the relatively fast sensors for Na+ and F- feature response times of 1-3 minutes at higher concentrations, the response time increases to 5-10 minutes when measuring in the range of the lower detection limits.

The size of an ion has an important impact on the speed of a measurement. That is why most of the other ions take longer to be measured. Analysis of heavy metals such as Cu2+ or Cd2+ can even take 20-30 minutes when performed near the lower detection limit.

A gentle and constant stirring in ion measurement is crucial for achieving a stable signal as fast as possible. Stabilization is reached faster, when moving from a lower concentration to a higher one than going the inverse way. Therefore, it is recommended to always start with the lowest concentration when calibrating and measuring.

What is the detection limit of an ion selective electrode?

The potential of the sensor is measured at many different concentrations of the ion of interest. One draws a curve of these mV signals against the concentration (logarithmic). Normally, it is S-shaped: rather flat at very high and at very low concentrations, almost linear in-between. The specified detection limits are defined by the range in which the behavior is more or less linear. To make an ISE usable for a different range, one would have to change the membrane surface (larger for lower concentrations) or use a different ion-selective substance in the membrane.

What is the average lifetime of sodium ISE?

A sodium selective electrode is a glass electrode very similar to a pH electrode. pH glass electrodes show a negligible alkali error, and amplification of the "alkali error" leads to sodium selective electrodes which respond only to changes in the sodium ion concentration at pH values above 7. Therefore the lifetime of a sodium ISE is similar to the lifetime of a pH electrode, and is influenced by a number of factors (e.g. elevated temperatures, extreme pH values, etc.).

Join the GEP eLearning Program
Know the Risk of Your pH Measurement
Ion Selective Electrode Guide – Theory and Practice
pH Theorie Guide
How to Measure pH in Small Samples
pH Toolbox for Life Sciences
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