What is the size of the Flood Sensor? Follow The dimensions of the Flood Sensor are 2.43” L x 2.48” W x 1.17” H. Facebook Twitter LinkedIn Comments 0 comments Article is closed for comments. Articles in this section Where is the best place to mount my Flood Sensor? Is my Flood Sensor always monitored? What is the size of the Flood Sensor? What is the temperature range the Flood Sensor can work in?