20697846 Serial Number U20-001-04 Baseline Monitor water levels and temperatures in wells, streams, lakes and wetlands (freshwater) with this 13-foot HOBO Water Level Data Logger. With its narrow range this logger provides the best accuracy in shallow waters. Onset HOBO Organizational HOBO Water Level Logger Sensor 20697846 0 to 4 m (0 - 13 ft) Pressure Range: 0-145 kPa (0 - 21 psi); Calibrated range: 69 - 145 kPa (10 - 21 psi), 0 - 40 C Ft; kPa 2019-09-16