Bently Nevada 21000-28-05-40-028-04-02 Proximity Probe Housing Assembly

✣ Product Information ✣

The Bently Nevada 21000-28-05-40-028-04-02 Proximity Probe Housing Assembly provides an external mounting solution for 3300 XL 8 mm reverse mount proximity probes, making it ideal for radial vibration and shaft position monitoring on critical rotating machinery. By installing the probe outside the machine casing, the housing allows probe inspection, replacement, and gap adjustment without disassembling the equipment, helping reduce maintenance time and improve equipment availability. It is widely used in turbines, compressors, pumps, and other industrial machines operating in hazardous environments.
Built with an aluminum housing and a 304 stainless steel sleeve, the 21000-28-05-40-028-04-02 offers durability and corrosion resistance for demanding industrial applications. The assembly includes a 0.5 m probe cable, 4.0 in standoff adapter, 2.8 in probe penetration, 3/4-14 NPT mounting thread, and one 3/4-14 NPT plug. Certified as a CSA Type 4 enclosure and compliant with API 670, the housing supports hazardous-area approved proximity probes for intrinsically safe installations and can be selected for applications requiring explosion-proof protection.

✣ Technical Data ✣

Manufacturer: Bently Nevada
Product Model: 21000-28-05-40-028-04-02
Product Type: Proximity Probe Housing Assembly
Place of 0rigin: USA
Probe with Connector: 3300 XL 8mm probe, selectable hazardous area approvals
Probe Cable Length: 0.5 m (20 in)
Standoff Adapter: 4.0 in
Probe Penetration: 2.8 in
Fittings: One 3/4-14 NPT plug only
Mounting Thread: 3/4-14 NPT
Material: Aluminum body with 304 stainless steel sleeve

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✣FAQ ✣

1. What is the 330105 Reverse Mount Probe used for?
It is used for shaft vibration and axial position monitoring in turbines, compressors, motors, pumps, and other rotating machinery where reverse mounting is required.

2. What is the advantage of the Reverse Mount design?
The reverse mount configuration allows installation from the back side of the mounting surface, making it ideal for equipment with limited front access or specialized mounting requirements.

3. What are the benefits of TipLoc and CableLoc technology?
TipLoc strengthens the bond between the probe tip and body, while CableLoc increases cable retention strength to 330 N (75 lbf), improving durability in high-vibration environments.

4. Is the probe approved for hazardous locations?
Yes. Agency Approval Option 05 includes CSA, ATEX, and IECEx certifications for use in approved hazardous environments.

5. What is the purpose of the optional FluidLoc cable?
FluidLoc technology prevents oil and other process fluids from traveling through the cable interior, helping protect monitoring systems in oil-lubricated machinery.

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