The sensor has to be recalibrated anytime after the Sensor Puck is removed from the bottle. So after reassembling the bottle always recalibrate the sensor in the app to get accurate readings.
Recalibrate If you notice your bottle is sending inaccurate readings. This can happen over time due to pressure changes if you are traveling.
Recalibrate Every 2 weeks to guarantee the most accurate results from your bottle.