Safgard; 400 Series Oil Steam Low Water Cut-off, 120V

400 series 24v gas steam low water cut-off hydrolevel low water cut-off electronically monitor the water level in low pressure steam boilers. the probe sensor mounts directly in the boiler at or above the lowest safe water level. the control allows the burner to operate normally as long as the water level remains in contact with the probe.made in the usa .