Visual level indicator,Visual level sight gauge,domed shape sight glass.
Material Body: Stainless steel 304,Stainless steel 304L,Stainless Steel 316,Stainless steel 316L
O-Ring: Viton,FKM,NBR, Aramid gasket，Silicone Rubber,and Copper seal
Glass Thickness: 2mm to 5 mm
Reflectors: Stainless Steel 304 Reflector
(Any type you can chose with reflector or without Reflector, You also can add float ball.)
Glass Type: Natural Glass,Tempered Glass and Borosilicate Glass
Resist Tempreature Range:-30'C to 220'C