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

#CMT# #/CMT# 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. #CMT# : #/CMT# An independent claim is included for a thin-film-pH sensor with a heating element. #CMT#USE : #/CMT# Method for testing or adjusting a thin-film-pH sensor (Claimed) present in a medium. #CMT#ADVANTAGE : #/CMT# The method involves placing a pH-sensitive element on a substrate that emits a signal depending on an actual pH-value of the medium, where the pH value of the medium is determined based on the emitted signal and a positive test voltage pulse and a negative test voltage pulse are generated between a reference electrode and an auxiliary electrode, and hence ensures improved and effective testing or adjusting thin-film-pH sensor that avoids routine recalibration and frequent replacement of the pH sensor. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic sectional view of a self-aligned thin-film-pH sensor. 1 : Substrate 2 : PH-sensitive element 3 : Reference electrode 4 : Auxiliary electrode 5 : Temperature sensor.