Model EAN-91M/EAN-93M (MTI.EWS.ER.M-EAN-93M/EAN-93M-B) tilt meter consists of uniaxial MEMS sensor mounted inside a compact, weatherproof enclosure. The Model EAN-91M tilt meter output is 4 V nominal at ± 15°. This output can be transmitted over long distances without any signal degradation. Model EAN-93M comes with SDI-12 digital interface such that all sensors can be connected through single bus cable to our compact automatic datalogger. These tilt meters are fixed on to a vertical or horizontal surface either directly using 4 mounting screws or fasteners or using a mounting kit that allows more flexibility in mounting the tilt meter. Movement of the structure causes change in tilt of the tilt meter, which results in change in output of the sensor. Measurement can be made on horizontal or vertical surfaces. Subsequent sets of readings, shows how the structure is behaving and will give an indication of permanent deformation as time progresses.