in PDF format in JPEG format SF20 Series General Application CCTV Systems - for general process monitoring in woodyards, paper mills, chemical plants, etc. Available with a variety of lenses and mounting arrangements. SF30 Series High Performance CCTV Systems - for general process monitoring in more critical areaas with hot, firty or hostile environments. Available with a variety of lenses and mounting arrangements. SF36 Series Special Application CCTV Systems - for very dirty, steamy and/or wet areas. These systems feature lenses with only a 1/4" diameter air purged opening to keep a clean field of view. Available with 6" and 12" air purged lenses and adjustable knuckle mounts or through the wall bulkhead mounts.   Custom SF30 Series CCTV Systems with NEMA 9 STEELON™ Enclosures for monitoring applications in extreme environments.