Single/ Double Window Sight Glasses are devices that are normally fitted in a fluid line to provide a visual indication of the system condition. These Sight Glasses are offered with heavy glass windows combined with soft selected seals which fit into properly machined grooves to provide leak free operation. These Sight Glasses are available with extra large round glass window areas to offer good visibility of the flow inside. Single/ Double Window Sight Glasses are easy to install and can be availed in varied range of sizes to suit specific requirement.