A faucet comprising: a spout having a hose disposed therein; a pull-out spray head fluidly coupled to the hose and configured to dock at an end of the spout; a sensor assembly disposed at least partially in the spout proximate the end of the spout, the sensor assembly including a lens bezel, a lens assembly, a hose guide, and a wire harness, wherein the lens bezel secures the sensor assembly within the spout, wherein the lens assembly is detachably coupled to the lens bezel, the lens assembly including a sensor and a lens at least partially exposed in the bezel aperture when the lens assembly is coupled to the lens bezel, wherein the faucet further comprises a control unit communicatively coupled to the sensor and configured to control fluid flow through the hose and the pull-out spray head based on control signals generated by the sensor, and at least one wire communicatively coupling the control unit to the sensor, wherein the wire harness is configured to separate the at least one wire from the hose in the faucet, characterized in that the sensor assembly additionally comprises a shutter disposed adjacent the sensor, the shutter being operable to obscure the sensor in a closed state and expose the sensor in an open state; wherein the shutter is operable to expose the sensor in the open state through the bezel aperture; wherein the hose guide is configured to decouple the hose from the sensor assembly during extension and retraction of the pull-out spray head; wherein the lens bezel is a c-shaped member having a central spine having a bezel aperture defined therein and a slide track that allows the shutter to slide along the direction of the central spine between the open state and the closed state. a spout having a hose disposed therein; a pull-out spray head fluidly coupled to the hose and configured to dock at an end of the spout; a sensor assembly disposed at least partially in the spout proximate the end of the spout, the sensor assembly including a lens bezel, a lens assembly, a hose guide, and a wire harness, wherein the lens bezel secures the sensor assembly within the spout, wherein the lens assembly is detachably coupled to the lens bezel, the lens assembly including a sensor and a lens at least partially exposed in the bezel aperture when the lens assembly is coupled to the lens bezel, wherein the faucet further comprises a control unit communicatively coupled to the sensor and configured to control fluid flow through the hose and the pull-out spray head based on control signals generated by the sensor, and at least one wire communicatively coupling the control unit to the sensor, wherein the wire harness is configured to separate the at least one wire from the hose in the faucet, the sensor assembly additionally comprises a shutter disposed adjacent the sensor, the shutter being operable to obscure the sensor in a closed state and expose the sensor in an open state; wherein the shutter is operable to expose the sensor in the open state through the bezel aperture; wherein the hose guide is configured to decouple the hose from the sensor assembly during extension and retraction of the pull-out spray head; wherein the lens bezel is a c-shaped member having a central spine having a bezel aperture defined therein and a slide track that allows the shutter to slide along the direction of the central spine between the open state and the closed state.