In certain parts of the world, water supply is not available throughout the day and hence pipes fill with air during non-supply hours. Even with an intermittent supply of water, ultrasonic meters measure water consumption with high precision. Since there are no moving parts in the meter, there is no air measurement and you can rest assured that the meter is measuring only water. Moreover, the inbuilt smart alarms will show a “Dry Alert” when the meter is running dry. So you will have the exact data about when and how much water is consumed throughout the day.