A fluid indicator providing an indication of the absence or presence of a fluid in a system and the presence of moisture in the fluid. The indicator includes means for connecting the same in a fluid line permitting fluid flow therethrough. The indicating means are carried within the indicator and are observable through suitable openings in the outer wall of the indicator. The indicator includes improved sealing means. Further, the indicator includes an improved visual indication of the absence of fluid in the indicator and an improved visual indication of the moisture condition thereof.