Sensing Device for Breath Rate Monitoring Fabricated by using Geomorphic Natural Clinoptilolite

The possibility of using slices of geomorphic clinoptilolite of natural origin in the fabrication of humidity sensors for personal spirometers and breath rate monitors has been investigated. These water sensors have shown to be fastresponding and therefore adequate for detecting all minimal variations in the ventilation activity. This type of sensor could allow to count the number of breathing events during a time interval (breath rate) and in combination with fast datalogging systems could be potentially exploited to draw accurate spirograms of the hexalation process. Signal detection can be based on the current intensity increase or on the voltage-drop, which follows to breath exposition, and the approach based on voltage-drop has shown to be very sensitive.