This Resideo Aquastat is a temperature control device designed for use in heating systems. It operates within a temperature range of 130 to 270 degrees Fahrenheit, with the ability to open on a rise in temperature. The device is equipped with an immersion type controller that provides high limit and circulator control in forced hydronic heating systems. It features a Micro Switch (M/R) that makes on temperature rise to operate burner or circulator motor. The product is designed for horizontal or vertical insertion into a well, providing direct immersion into the medium being controlled. Its robust construction ensures durability and reliable performance under varying conditions.