Circulator Controller Application Circulator Maximum Control Temperature 240 Degrees F Minimum Control Temperature 100 Degrees F Differential Temperature 5 Degrees F to 30 Degrees F Adjustable Mounting Orientation Horizontal Vertical Number of Switches 1 Switch Action Makes Burner Circuit Voltage Type Millivolt Capillary Tube Length 3 in Spud Size 3/4 in NPT Contact Form SPST Multizone Control Compatible Not Applicable Product Type Circulator Controller Probe Length 2 7/8 in