Patent ID: 7913577

Claim:
A flow meter comprising: a case body which is formed with a fluid space in an inside of the case body; an impeller which is disposed in the fluid space and whose rotation number is varied according to flow quantity of fluid flowing through the fluid space; a detected part which is integrally provided in the in impeller; a detecting part which is provided with detecting terminals structured to detect the detected part to convert rotation of the impeller into an electric signal; terminal pins which is provided with terminal contact parts, which are electrically connected with the detecting terminals of the detecting part, and connector parts with which a connector structured to output the electric signal converted by the detecting part to an outside is connected; and a holder to which the terminal pins are fixed and which is detachably held by the case body through a holder holding part provided in the case body; wherein the detecting part and the terminal contact parts are held between the case body and the holder by attaching the holder to the case body so that the terminal contact parts are contacted with the detecting terminals.