Do not place heat generating objects within the detection range of the thermopile sensor, such as heaters, water heaters, televisions, computers, refrigerators and other electrical appliances, unless these electrical appliances are turned off. Heating, water heaters, computers, and refrigerators are turned on and off in the automatic program control state which will cause false alarms. https://www.senbasensor.com/products/infrared-thermopile-sensor/All Rights Reserved