sentences:  The sensor cannot react to sudden changes in moisture, i.e., the reaction on the windings’ surfaces takes some time to stabilize.Large amounts of water in the pipeline (called slugs) will wet the surface and requires tens of minutes or hours to “dry-down.” Effective sample conditioning and removal of liquids is essential when using an electrolytic sensor.The piezoelectric sorption instrument compares the changes in frequency of hydroscopically coated quartz oscillators.