Abstract: A liquid level determining and sampling device which takes the form of a transparent elongated tubular member which has a sealing plug attached at the lower end thereof. Fluid conducting openings are located about the sealing plug to permit liquid to be conducted past the sealing plug to within the tubular member. A sleeve is threadably engaged to the lower end of the tubular member. The sleeve interiorly includes a sealing plate within which is formed a hole. The sleeve is to be movable with respect to the tubular member so the sealing plug can either be spaced from the hole or tightly engaged with the wall of the hole. Fluid conducting openings are formed through the side wall of the sleeve adjacent the outer end thereof to permit liquid to be conducted through the hole, through the fluid and into the tubular member. The outer end of the sleeve includes a resilient ring which is to frictionally engage with the bottom of the tank which contains liquid the level of which is to be measured.