Dial gauges are used for a variety of purposes in machine shops starting from setting up milling machines and lathes to ascertain the accuracy of work pieces. These gauges are designed to measure readings with precision and identify deviations/defects in a work piece. Air gauge units are used to measure air pressure. Manometers are used to measure gauge and differential pressure. It can account for different scalable units of measurement such as in H2O, psi, bar, mbar, kPa, inHg, mmHg, ozin, ftH2O, cmH2O, kgcm. It offers accuracy in the range of minus 0.3 to 0.3 percent FSO. Digital gloss meters are used mainly for floor maintenance, tile and glass measurement. These meters have a four digits backlit LCD which shows a measurement range of 0.1 to 200 gloss units. It has a resolution of 0.1 gloss unit with an accuracy of minus 1.0 to 1.0 gloss unit.