Honeywell Aquastat Relay, 120 VAC, 180 to 240 degree Fahrenheit, 15 degree Fahrenheit Differential, Vertical Mount, 1-1/2 to 3 inch Insulation Depth, 0 to 95% Humidity
The L8148 Aquastat Relays are immersion type hydronic controllers that combine high limit protection with switching relay control of burner and circulator motors.