The Barologger® Gold uses algorithms based on air pressure only. It measures and logs changes in atmospheric pressure, which are then used to compensate water level readings. The Barologger® is a Levelogger® with a small range of 4.92 ft (1.5 m) adequate to monitor the fluctuations that occur in barometric pressure. Typically, Barologger® readings range from 1 – 3.3 ft (30 – 100 cm) when the Barologger® is programmed with its operating altitude. Failure to input the correct altitude with result in incorrect readings and may cause the pressure transducer to go out of range. It is strongly recommended that the altitude input be accurate to ≤10 m. As a rule or thumb, a Barologger® can be used to compensate all the Leveloggers® in a 20 mile (30 km) radius.