SENSOR AND METHOD FOR DETECTING RESOURCE USAGE IN A DISPENSER, DISPENSER, AND SYSTEM AND METHOD FOR MONITORING RESOURCE USAGE IN A DISPENSER

摘要

The invention relates to a sensor for detecting resource usage in a dispenser, in particular in a washroom dispenser, a dispenser, in particular a washroom dispenser, and a method for detecting resource usage in a dispenser, in particular in a washroom dispenser. Further, the invention relates to a system and method for monitoring resource usage in the dispenser. The sensor comprises a first and a second pair of an emitter and a receiver of radiation, wherein each of the two pairs is adapted to detect the presence of a resource by receiving via the receiver radiation emitted by the emitter which has been reflected by the resource, and wherein the first pair is adapted and arranged to detect the presence of a resource at a higher resource level than the second pair.