Description
To measure pore water pressure in the soil, earth/rock-fill foundations and concrete structures, we have EPP-30V. It is a vibrating wire piezometer that is made of stainless steel and hermetically sealed under a vacuum of 0.001 Torr. These sensors have a built-in thermistor for temperature measurement and a surge arrester for protection from lightning.
 
FEATURES
 Reliable, accurate, low cost and simple to read.
Protected against lightning spikes.
Easy installation in standpipes, pressure vessels and ideal for underground work.
 Hermetically sealed under a vacuum of 0.001 Torr; stainless steel construction.
Thermistor provided for additional temperature measurement.
 Can measure negative pressure. Not limited to depth of water being within 5 m from the observation station as is in case of twin tube piezometers.
 Very small time lag.
 Transmission of signal as a frequency over long cable lengths.