Hydrolevel 3250 Hydrostat

120Vac Temperature Limit and Boiler Reset Fuel Smart Hydrostat for Oil Boilers with 110-200 degrees F Adjustable Low Limit, 100-200 degrees F Adjustable High Limit, Automatic Differential, Adjustable Economy Settings, Optional Outdoor Reset Operation with addon sensor (not included), and Optional Low Water Cut-Off Operation with addon Electro-Well (not included)