reel drum tape flow type time depth cable wells float A DWLR changes devices insights interest movement borehole direction lower end hydrology water levels digital system specific point allegianceindia piezometer tube groundwater level small-diameter tube groundwater pressure piezometric pressure pressure measurement continuous monitoring aquifer characteristics geotechnical engineering PIEZOMETER NON TELEMETRY Dial Water Level Recorder water level measuring device More Details Contac Us Allegiance India