Honeywell Aquastat Relay, High and Low limit, 120 VAC, 120 to 240 degree Fahrenheit, 8 degree Fahrenheit Differential, Horizontal/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.