Fused Window Sights allow visual observation of liquid levels and their condition. They can be used to display fluid motion or mechanical movements, as well as to view and perform tests in a safe enclosure. Specific uses include fluid sighting on hydraulic tanks, pressure vessels, reservoirs, packaged power equipment, hydraulic lines and dipping. Their use can be applied to any application where oil or fluid inspection is essential. Two or more sights can be mounted so as to indicate high, low or in-between levels.","These window sights may be mounted into any corresponding pipe thread. The body is constructed with plated steel (other body materials are available upon request). The glass sight is fused to the steel body, creating a leak tight seal. This part is also available with a stainless steel reflector to maximize liquid level visibility, even in poor light (see part no. B2890-16). The reflector will not tarnish, corrode or discolor under the most adverse of conditions. T he window sight withstands up to 125 PSI and 250° F.