21000-28-05-00-130-04-02 Bently Nevada Proximity Probe Housing Assemblies For Critical Rotating Machinery Protection The Bently Nevada 21000-28-05-00-130-04-02 is an all-metal, aluminum proximity probe housing assembly engineered to externally mount and protect critical machine vibration sensors. It allows field technicians to adjust or replace underlying proximity probes without disassembling major machinery components. Fully compliant with API 670 requirements for critical