Method for extending the life of chemical sensors
The method is described for extending the life of chemical sensors for determining individual components in the gas phase, the contact between fluoride-ion conductor and metal electrode being heated once or repeatedly under the conditions of the gas to be measured briefly to temperatures between 300 and 600 DEG C. Heating may be carried out by electrical resistance heating, the metal electrode being itself used as the heating resistor. With the method according to the invention, simple activation of the sensor under measuring conditions is made possible. By repeated activation, a significant increase in the life is achieved. The extremely short time of the reactivation has the effect that only the sensitive boundary surface is heated, whereas the sensor overall is heated only slightly, so that it is again at the measuring temperature directly after activation. The field of application is chemical analysis, for example environmental protection or process control.
MORITZ WERNER DR SC NAT [DE]; KRAUSE STEFFI DIPL CHEM [DE]
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