Reflex type level gauges sturdily consist of a body with glass and cover tightened by U-bolts. They have a prism glass window that uses the basic optical principles of light refraction and reflection to enhance the indication of the liquid level.
In brief when the light strikes the area of glass covered by the liquid is allowed to pass to the interior of the level gauge, so that the area appears dark (black). While the light strikes the open space, above the liquid level is reflected back to the observer so that the area appears silver-white. It is possible to see the actual liquid level in the systems, even transparent liquids can be clearly observed. They are made from carbon steel, stainless steel, and carbon steel with rubber lined or lead lined depends upon the services.
They are suitable for various ranges of pressure lines; from low to high pressures, and made of carbon steel or stainless steel. In addition, they are lightweight structures and available for long visible lengths. What is more, Reflex types are available at low price. Reflex type level gauges are equipped with a ball check valve (emergency shut-off valve).