Oil film sensor

Oil film sensor

The sensor detects the oil film formed on the water surface due to oil outflow. The principles of detecting the oil film on the water surface include using the change of light reflectivity and using the substance that absorbs oil. The former uses the fact that the surface reflectivity of the oil film to visible light is greater than that of water, and uses a light sensor to detect the existence of the oil film. The latter sets the substance that easily absorbs oil as a detection element on the float. The detection element absorbs oil to increase its specific gravity and forms an electrical switch.