The most common construction for countertop griddle and range-top griddle thermostat applications is to fasten the bulb to the bottom of the griddle plate and protect the bulb from direct contact from the heating element (gas or electric) so that it can sense the change in the plate temperature.
Temperature consistency across a griddle surface can be tightly controlled using this type of thermostat, making it ideal for high production environments where product uniformity and consistency are critical, as much for ease of operation as food quality.