soil safer types usage ground lengths diameter functions DWLR DWLR stability basic data behaviours potentially Piezometers appurtenant foundations water level construction applications simplest form pore pressure Casagrande tip extension pipe allegianceindia accurate results earth/rock fills economical design Proper evaluation design improvement working principles higher reliability concrete structures geotechnical domain dangerous conditions pressure transducers geotechnical sensors piezometer definition More Details Contac Us The Casagrande piezometer vibrating wire piezometer Allegiance Water Management sub-surface piezometric level important geotechnical monitoring instruments