SPT metrology is a manufacturer and supplier of granite surface plates of grade 00, Grade 0 as per DIN and IS Standards. Inspection is carried out with a High Precision Electronic Level (Wyler Swiss - Base Size: 200mm, Sensitivity: 0.001MM/M, Range: 20MM/M) & Spirit Level (ROECKLE Germany - L.C.: 0.10mm / M) calibrated by an NABL accredited lab at regular intervals.