Thelevelinstrumentisaninstrumentforcontrollingtheangleandslope(horizontal,vertical,degrees.)Ofagivenobjectrelativetotheground.Thisisnowavailableonsmartphones.
Itisalsocalledhorizontallevel,bubblelevel,bubbletubelevelandlaserlevel.Therearealsodigitallevels.Allcarpentersusethespiritlevel.
Itisusedextensively,mainlyinthefieldofcivilengineering,construction,landsurveying.Thisspiritlevelisveryaccurate.