läbipaistev toru, mille kaudu paagi või katla käitaja saab jälgida selles sisalduva vee taset
device for checking, before start-up and after shut-down, that all or part of the measuring system is either filled completely with liquid (full hose measuring systems) or completely empty of liquid (empty hose measuring system)
type of level sensor, a transparent tube through which the operator of a tank or boiler can observe the level of liquid contained within
Lihtsaks veenäiduklaasi asemel võib olla kas plast- või klaastoru, mis on ühendatud paagi põhjaga ühes otsas ja paagi ülaosaga teises otsas, ning vedeliku tase veenäiduklaasis on sama, mis vedeliku tase paagis.
Simple glass water gauges may be just a plastic or glass tube connected to the bottom of the tank at one end and the top of the tank at the other, and the level of liquid in the sight glass will be the same as the level of liquid in the tank.
