Temperature Controller; Bulb Type Copper; Voltage Rating 120 to 240 Volt AC; Minimum AC Voltage Rating (V) 120 Volt; Maximum AC Voltage Rating (V) 240 Volt; Minimum DC Voltage Rating (V) 0.25 Volt; Maximum DC Voltage Rating (V) 12 Volt; Operating Temperature 100 to 240 Deg F; Size 2" Width x 2-1/8" Depth x 5-5/8" Height; Mounting Horizontal/Vertical; Application Boiler, Storage Tank, Duct; Approval UL, CSA, AGA; Contact Rating 5.1 Amp at 240 Volt AC, 8 Amp at 120 Volt AC (Full Load); 30.6 Amp at 240 Volt AC, 48 Amp at 120 Volt AC (Locked Rotor), 0.25 Amp at 0.25 to 12 Volt DC; Differential Temperature 5 to 30 Deg F Adjustable; Operating Pressure 255 PSI (Immersion Well), 200 PSI (Direct Immersion); Switching Action SPST; Bulb Size 3/8" x 2-7/8"; Capillary Length 1-1/2"; Well Spud Size 1/2" Threaded; Includes Well; Packaging Quantity 100; Weight 1.2 Lb