Oedometer used for 1-dimensional consolidation tests. Specimen is loaded into the 2.5 inch diameter (63.5 mm), fixed-ring oedometer. Initial specimen height is 1 inch (25.4 mm). As the vertical load steps are applied, the sample height is measured with the lvdt, and the vertical load is measured with the load sensor. The fluid level in the reservoir is maintained so the specimen is always submerged (fully saturated).