SAF Viewports Hi-Temp Peep Sights have standard NPT male pipe threads. The housing of the units is available in stainless steel or carbon steel with nickel plating. Each unit is carefully assembled with a quartz lens and grafoil gaskets (blue vycor lenses are available upon request, please contact us for details).
The quartz lens is suited for a maximum intermittent operating temperature of 2048°F and continuous operating temperature of 1600°F, and allows for optical pyrometer checking of the flame or operation of the vessel. The lens can also be easily removed for cleaning or replacement. Standard stocked units range in size from 1/2″ to 2″. Custom sizes 2-1/2″, 6″ by special order. Please note that the operating environment and temperature should be considered when ordering.
