Sonar trumps eTape
I’ve given up on the Milone eTape entirely. I just couldn’t get it to work reliably. Instead, I decided to go with a RadioShack Ultrasonic Range Sensor as my backup method for detecting water. It’s mounted on the basement ceiling and will alarm when it detects an inch of water on the floor. The floor is sloped, so an inch isn’t nearly as bad as it sounds. It’s been working well. I’m leaning towards a pressure transducer for the main sensor.