In case of: measurement of pore pressures in soft soil and saturated soil or monitoring over-pressures induced overload, road and rail embankments and tanks; OTR suggests the use of the drive-in Piezometers.

This type of piezometers is constituted by a metal body of cylindrical shape and a conical tip 40mm diameter, larger than the body of the piezometer to facilitate its insertion into the ground. The pressure transducer is housed inside of the metal body complete with a porous filter made of sintered steel or ceramic. The electronics of the transducer is completely embedded in resin to ensure long-term reliability. The water pressure deforms the membrane integral with the sensor which converts the pressure into a signal, electrical, proportional to it. Drive-in piezometers are easily connected to a portable readout unit or to Datalogger. The instrument contain a membrane superimposed to the sonsor which returns a mA value proportional to the pressure of the water. 

How is it installed?                                                 

Drive-in piezometer is installed directly in the ground (soft) through a thrust device (static penetrometer and / or drilling machine), by applying a vertical force with a battery of rods, to bring the instrument to the installation point. On the upper end of the pusher, you need an adapter with groove, to avoid damaging the cable.