The WaterBug? 200 is a water detection device ideal for computer rooms, document storage areas, warehouses, sump pumps and basements. WaterBug sensors activate the alarm when a conductive bridge is formed between 2 contacts. Features:?Console includes one standard unsupervised surface sensor?Console accepts up to 6 total sensors ?Sensors can be located up to 100? away from the unit for wide area protection ?Can be used to detect an absence of waterAdditional InformationWill not alarm due to high humidity or condensation.