▎ 摘　　要

NOVELTY - The sensor has a sensor main body provided with a piezoelectric substrate, an interdigital electrode and a graphene oxide-zinc oxide nanowire-graphene quantum dot composite structure sensitive layer. Thickness of the interdigital electrode is about 0.1-0.3 millimeter. Thickness of the graphene oxide-zinc oxide nanowire-graphene quantum dot composite structure sensitive layer is about 0.1-0.3 millimeter. USE - Used as a ultra-high sensitive surface acoustic wave humidity sensor. ADVANTAGE - The sensor is simple in structure and easy to detect, and has high sensitivity, and determines relative humidity interval for about 45-50% to reach 148.61% RH. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of a ultra-high sensitivity surface acoustic wave humidity sensor.