To visually recognize the presence of a flowing fluid by simple structure.

This indicator A has a main body 50 having an indication member 10 for indicating a flow of the fluid comprising a transparent tube 11 with an inside formed into a tapered shape, and a float 12 with a circular cross-section arranged in an inside of tube 11, in order to indicate whether the fluid supplied from a fluid supply means (flow regulator B) flows or not, a holding hole 54 for holding the indicating member 10, an attaching part 20 attached detachably to the fluid supply means, and an attaching part 30 for attaching a supplied means to be supplied with the fluid, and the main body 50 is provided with upstream flow passages 41, 42 ranging over from the attaching part 20 provided in the main body 50 up to a lower end part of the indication member 10, and downstream flow passages 43, 44 ranging over from the an upper end part of the indication member 10 up to the attaching part 30 provided in the main body 50.

COPYRIGHT: (C)2007,JPO&INPIT