Immersion Controller, Application Circulator, High Limit, Low Limit, Maximum Control Temperature 240 Degrees F, Minimum Control Temperature 130 Degrees F, Differential Temperature 10 Degrees F Fixed (High Limit), 10 Degrees F to 25 Degrees F Adjustable (Low Limit), Mounting Orientation Vertical, Number of Switches 1, Burner Circuit Voltage Type Millivolt, Capillary Tube Length 3 3/8 in, Spud Size 3 in, Contact Form Not Applicable, Multizone Control Compatible Yes