A vertical pipe in an oil or water tank, used to guide a sounding device when measuring the depth of liquid in the tank. Also called a Sounding Tube.
Uphayiphi obheka ezantsi etankini yamanzi okanye le-oyile, elisetyenziswa ukukhokela indlela zesandi xa kulinganiswa ubunzulu bento efana namanzi etankini. Kuye kuthiwe nguphayiphi olinganisa isandi.