Install these sight plugs to observe the presence and levels of liquid in a gearbox or other type of reservoir, or use them as a sight window to monitor relays or switches in housings, ensure that gears are in motion, and check burner flames. They allow viewing of the contents without having to open the container.
Use these sight plugs in low-pressure applications, such as in gearboxes and reservoirs. They feature a stainless steel reflector for easy viewing of dark-colored liquids.
These heavy duty sight plugs have a one-piece, fused construction that increases their strength and allows them to withstand high-pressure environments, such as in boilers and other steam devices.