The reflex liquid level gauge has a sturdily constructed body, with the glass and cover securely held by U-bolts to maintain a hermetic seal.
This type of level gauge features several parallel grooves cut into the glass surface that is in contact with the liquid. The resulting primatic differaction caused gases to appear white by reflection: liquids black by absorption. Thus, the level of even transparent liquids can be clearly observed.
Low medium and high pressure types may be used according to application condition and units my be manufactured using carbon steel, stainless steel or a wide variety of other material for parts in contact with the liquid. Type HRG reflex gauges have a number of further advantages including light weight, Availability of long visible length and low price.