Observing the contents in a processing vessel in a hazardous classified location normally requires the use of two sight glasses: one for lighting, the other for viewing. The Series SLEX-100/NW eliminates the expense of an additional port and the expense to install it. The explosion-proof UL-844 & C-UL/CSA C22.2 No. 137 listed SLEX-100 lighting units and the corresponding Series NW sight glass provide glare-free illumination precisely where you want it - at the viewing port.
