A fluid monitoring assembly comprising: a segment of replaceable, unreinforced polymer conduit comprising a wall defining a lumen through which the fluid passes; a sensor mount integrally formed with the wall of the segment of replaceable, unreinforced polymer conduit and extending generally transverse with respect to a longitudinal axis of the segment of replaceable, unreinforced polymer conduit, the sensor mount including an aperture having a seat formed therein and defining a female shaped inner surface extending through the sensor mount to the lumen of the segment of replaceable, unreinforced polymer conduit; a sensor configured to be removably secured within the sensor mount, the sensor having an elongate body terminating at one end thereof in a sensing portion, the elongate body having a male projection on a portion thereof and configured to rest within the female shaped inner surface when secured within the sensor mount, the elongate body further comprising a flange that rests on the seat and wherein the sensing portion is exposed to the lumen of the segment of replaceable, unreinforced polymer conduit; a housing having first and second portions (16a, 16b) connected to one another at a hinge, the housing defining an interior portion configured to encapsulate the segment of replaceable, unreinforced polymer conduit, at least a portion of the elongate body of the sensor including the flange, and the sensor mount, with parts of the housing portions (16a, 16b) being configured to closely match the contours of the sensor mount and the elongate body of the sensor to maintain the position of the sensor within the conduit; and at least one fastener configured to secure the first and second portions (16a, 16b) of the housing in a closed state. a segment of replaceable, unreinforced polymer conduit comprising a wall defining a lumen through which the fluid passes; a sensor mount integrally formed with the wall of the segment of replaceable, unreinforced polymer conduit and extending generally transverse with respect to a longitudinal axis of the segment of replaceable, unreinforced polymer conduit, the sensor mount including an aperture having a seat formed therein and defining a female shaped inner surface extending through the sensor mount to the lumen of the segment of replaceable, unreinforced polymer conduit; a sensor configured to be removably secured within the sensor mount, the sensor having an elongate body terminating at one end thereof in a sensing portion, the elongate body having a male projection on a portion thereof and configured to rest within the female shaped inner surface when secured within the sensor mount, the elongate body further comprising a flange that rests on the seat and wherein the sensing portion is exposed to the lumen of the segment of replaceable, unreinforced polymer conduit; a housing having first and second portions (16a, 16b) connected to one another at a hinge, the housing defining an interior portion configured to encapsulate the segment of replaceable, unreinforced polymer conduit, at least a portion of the elongate body of the sensor including the flange, and the sensor mount, with parts of the housing portions (16a, 16b) being configured to closely match the contours of the sensor mount and the elongate body of the sensor to maintain the position of the sensor within the conduit; and at least one fastener configured to secure the first and second portions (16a, 16b) of the housing in a closed state.