A flow detector has a housing (1) with tongues (8), which allow to anchor it to a support to withstand pulling forces. The housing further comprises pegs (41) provided to mate with openings or recesses in the same support, which allow to secure it against lateral forces. The tongues (8) and pegs (41) are mounted to a hull (7) of a housing (1) of the detector, which carries on its opposite side an inlet (4a) and an outlet (4b) for the fluid to be measured. Connectors (5) are provided on the same side as the tongues (8) and the pegs (41) for connecting the detector to an external system. This design is robust and allows to mount the detector to the support in quick and secure manner.