Sensors and instruments for monitoring, measuring and displaying movements in rocks and walls. Uplift measurement – Casagrande Measuring of the relative uplift pressure of sole water at hydraulic structures such as dams. Telepressmeter PWVW Absolute pressure sensor for all kinds of liquids. Telepressmeter PWPRD Absolute or relative pressure sensor to measure pressures of all kinds of liquids. Telethermeter TC/TA/TW Electrical resistance thermometer for the measuring of temperatures in concrete, air and water.