The Datalogger Type 575-II is the successor model of the long-standing field-proven Type 575 for measuring and recording water level and temperature in groundwater wells and surface water stations. First, the slimmer diameter of 22mm catches the eye, now this Groundwater Datalogger can also be used in 1-inch groundwater observation wells. In addition of a large flash memory, the circuit has been designed to extremely low power consumption.