The Bently Nevada 21000-28-05-00-077-03-02 is an aluminum proximity probe housing with a 3300 XL 8mm hazardous-area-approved probe, 0.5m cable, 7.7-inch penetration, and fitting option 03 (plug, reducer, and cable seal grip).
The Bently Nevada 21000-28-05-00-050-03-02 is an aluminum proximity probe housing assembly with a 3300 XL 8mm probe, 0.5m cable, and 5.0-inch probe penetration. It features explosion-proof certification and 3/4-14 NPT mounting threads for hazardous area monitoring.