Product news

Measuring the p.H value is the most important measurement in analytical chemistry. It is defined as the negative decadic logarithm of the H3O+ ionicactivity. The H3O+ ion activity corresponds approximately to the H3O+ ion concentration.the H3O+ ion concentration. The usual pH value scale ranges from pH= 0 (acidic, 1N HCl) to pH = 7 (neutral, water) to pH= 14 (alkaline, 1N NaOH). According to the Nernst equation, the pH value is temperature-dependent.
The ion-sensitive field-effect transistor (ISFET) developed at Fraunhofer IPMS can measure pH very precisely and is combined with a reference electrode, just like the conventionalglass electrode. However, compared to the glass electrode,
the ISFET has several advantages and features:
- Mechanical robustness, almost unbreakable
- Extensive pressure stability
- Dry storage possible
- Adaptation to measuring conditions
- High integrity and miniaturization
- Low power consumption
- Low drift
- Minimal sensitivity to light
- ESD protection
- Array design possible

Visit us in hall 1 at the Fraunhofer IPMS booth 317.