Abstract: A fouling resistant manifold (1) for mounting a fluid monitoring sensor used to monitor various fluid parameters of a fluid. The manifold (1) includes a fluid inlet (2) and a fluid outlet (3) connected by a fluid channel (4). A sensor mounting area (7) is provided for mounting a respective sensor module and flow deflection formation (9) is configured to control the velocity gradient of the fluid flow at the sensor mounting area (7) thereby inducing a localised increase in shear stress to the manifold surface wall. The increased wall shear reduces the tendency for suspended matter in the fluid to attach to the channel surface.