Method for testing or adjusting thin-film-pH sensor present in medium, involves placing pH-sensitive element on substrate that emits signal depending on actual pH-value of medium

摘要

The method involves placing a pH-sensitive element (2) on a substrate (1) that emits a signal depending on an actual pH-value of the medium. The pH value of the medium is determined based on the emitted signal. A positive test voltage pulse and a negative test voltage pulse are generated between a reference electrode (3) and an auxiliary electrode (4). The height of the pulses in the signal of the pH-sensitive element is compared with each other. The correct determination of the pH value or the alignment of the pH-sensor is tested depending on the relative height of the pulse in the signal. An independent claim is included for a thin-film-pH sensor with a heating element.