It also ensures a pump's intake remains submerged during purging or well development. The drawdown function is used to monitor falling hydraulic head during low flow sampling, pumping and other aquifer/well tests. Water level mode allows accurate depth to water measurements in wells, boreholes, standpipes and tanks. One simple toggle switches between static water level and drawdown measurements. The 101D Water Level DrawDown Meter has all of the same qualities as our well-known 101 P7 Water Level Meter, with the added feature of a drawdown mode.
