The H6045A1002 Single Duct Humidors and H6120A1000 Single Indoor Humidors are designed to monitor the relative humidity of air conditioning systems and climate rooms and to control air humidifiers and dehumidifiers in indoor swimming pool buildings. Other applications include food storage sites, textile and paper industries, printing plants, the optical and chemical industries, greenhouses, hospitals and Spaces where relative air humidity levels need to be measured, controlled and monitored