How loud is the audible alarm? Michael T August 21, 2020 17:40 Updated The alert alarm is 80 decibels. Related articles How do I know if a sensor is connected? Sensor Details and Specifications What does the negative number by my sensor mean in the mobile app? How much water does it take to set off the alarm? How to delete a sensor from the mobile app Comments 0 comments Please sign in to leave a comment.