Sensor single-hole deck-mount bathroom faucets let users start or stop the flow of water without touching the faucets. This reduces the spread of germs and helps keep the bathroom environment clean. The faucets automatically turn off after a preset period of time to save water and utility costs and prevent the sink from overflowing. These faucets supply tempered water through a single spout for handwashing and grooming tasks. Users cannot control the temperature of the water flowing through sensor faucets, so they must be preset to water temperatures that prevent scalding injuries. Single-hole deck-mount faucets install into one hole on a flat surface, such as a sink or counter.