SENSOR APPARATUS WITH CLEANING

A sensor apparatus includes a base, a nozzle positioned in the base and rotatable relative to the base, an extension arm elongated from a first portion to a second portion, and a fluid source fluidly connected to the nozzle. The first portion is fixed to the nozzle, and the second portion is spaced from the nozzle. Pressurizing the fluid source applies force to the second portion of the extension arm.