Double flat glass level gauge:

the level can be indicated clearly because of the double color indication of the level gauge.

and because of good function of the lower self-closing valve,when required the liquid chambers can be cleaned

 without drain of the tank.it is easy to operate,and safe for use.the level gauge applies to measure height for water,

lubricating oil and fuel oil of flash point over 65°C

Measuring range:

Nominal length"L" can be decided between 245 and 6500 discretionarily as customer request,

the standard length can also be selected as per fooling tadle.