The WaterBug® Supervised Sensor ("W-S-S") is a supervised water sensor that monitors for the presence of water and an accessory for the EnviroAlert® and EnviroAlert Professional® devices as a part of the Winland Critical Monitoring Solution. WaterBug sensors activate the alarm when a conductive bridge is formed between 2 contacts. The sensors will not alarm for high condensation. This is not a stand-alone product.