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Vernier® Nitrate Ion-Selective Electrode

Measure the concentration of nitrate in aqueous samples.

  • The Nitrate ISE has a combination-style, non-refillable, gel-filled electrode
Nitrate concentration, which can be increased by acidic rainfall, fertilizer runoff from fields, and plant or animal decay or waste, is an important parameter in nearly all water quality studies. Use the Nitrate ISE to determine the concentration of the nitrate ion in a water sample.

Like all other PVC ISE membranes, the membrane on the ISE has a limited life expectancy. However, the replaceable module of ISE allows you to simply discard the used membrane module, and replace it with a new one.

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

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

For educational use only.



Item # Description Unit Availability Price Quantity
470120-638 Nitrate Ion-Selective Electrode
Each Retrieving
470219-308 Nitrate Replacement Module
Each Retrieving


Accuracy ±10% of full scale (calibrated 1 to 100 mg/L)
Dimensions Electrode length: 155 mm;
Body diameter: 12 mm;
Cap diameter: 16 mm;
Cable length: 100 cm
Range 1 to 10,000 mg/L or ppm, pH range: 2.5 to 11;
Temperature range: 0 to 50°C (no temperature compensation)


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