Barologger is known as levellogger with a small range of 1.5 m adequate to monitor the fluctuations that occur in barometric pressure. The barologger's readings are used to barometrically compensate levelogger readings. 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. When the barologger is programmed at its operating altitude, its readings can be used to directly compensate for barometric pressure, the readings of any levelogger programmed at the levelogger's operating altitude. As a rule or thumb, a barologger can be used to compensate all the leveloggers in a 20-mile (30 km) radius.