An ice machine with a vertical cube evaporator sensor will switch from refrigeration cycle to harvest cycle by using which sensor?

The correct answer is the ice thickness sensor. This sensor is specifically designed to measure the thickness of the ice being produced in the ice machine. By monitoring the ice thickness, the machine can determine when a sufficient amount of ice has been formed and is ready to be harvested.

When the ice reaches the desired thickness, the ice thickness sensor triggers the switch from the refrigeration cycle to the harvest cycle. This process ensures that the ice is collected efficiently without interrupting the production process unnecessarily. By using this sensor, the ice machine maintains optimal performance and prevents issues that could arise from having either too little or too much ice in the evaporator.

Other sensors, like the temperature or pressure sensors, may play roles in the overall operation of the ice machine but are not directly responsible for initiating the transition between refrigeration and harvest cycles based on ice formation. The flow sensor is used for different purposes, such as monitoring water supply, rather than measuring ice thickness. These distinctions clarify why the ice thickness sensor is the vital component in this scenario.