The Bently Nevada 31000-28-05-20-110-00-02 proximity probe housing assembly provides robust mechanical and environmental protection for radial vibration and Keyphasor measurements on turbines, compressors, and pumps. This model is specifically configured for use with a 3300 XL 8 mm probe that carries multiple approvals, making it a versatile choice for various industrial applications.
Its construction incorporates advanced materials to withstand harsh conditions. The main housing uses glass-reinforced Polyphenylene Sulfide (PPS) thermoplastic with conductive fibers, while the sleeve and retaining chain are made from AISI 304 stainless steel. This combination ensures excellent corrosion resistance and structural integrity. Furthermore, the assembly fully complies with the American Petroleum Institute's (API) 670 Standard for externally mounted proximity probe housings.
Understanding the part number is key to knowing what this housing offers. The 31000-28-05-20-110-00-02 model breaks down as follows:
A: Probe Option (28) : Designed for a 3300 XL 8 mm probe with multiple approvals.
B: Probe Cable Length (05) : Includes a 0.5-meter (20-inch) probe cable.
C: Standoff Adapter (20) : Features a 2.0-inch standoff adapter.
D: Probe Penetration (110) : Provides an 11-inch probe penetration depth.
E: Fittings Option (00) : Supplied without fittings.
F: Mounting Thread (02) : Equipped with a 3/4-14 NPT mounting thread, which is required when using the standoff adapter.
Additionally, the 31000-28-05-20-110-00-02 boasts significant environmental and performance credentials. It carries a Type 4X rating certified by the Canadian Standards Association (CSA) and an IP66 rating verified under standard SC115582-1 (e) 106. Moreover, it meets the CENELEC standard EN50014 for electrostatic dissipation of plastic materials located in hazardous areas.
The sealing system is equally noteworthy. When used with a 3300 XL 8 mm probe, the assembly effectively seals differential pressure between the probe tip and the housing body. The internal seal uses a Viton O-ring, while the interface between the sleeve and housing uses a Neoprene O-ring. However, please note that the housing is not designed to resist internal or external pressure, and probes are not pressure tested prior to shipment.
The material selection for the 31000-28-05-20-110-00-02 directly contributes to its durability and long service life.
Housing Material : Glass-reinforced Polyphenylene Sulfide (PPS) thermoplastic containing conductive fibers
Sleeve Material and Retaining Chain : AISI 304 stainless steel
Outer Sleeve and Exterior Screws : AISI 303 stainless steel
O-Ring Material : Neoprene
Recommended Torque (retaining nut) : 29.4 N·m (260 in·lb)
Furthermore, the assembly demonstrates impressive mechanical strength. In typical tests, the outer sleeve was mounted on a test stand with its axis parallel to horizontal. The housing supported 912 N (205 lb) placed approximately 38 mm (1.5 inches) from the unsupported end, with the cover fastened and grounding liner installed.
Impact resistance is another critical feature. BASEEFA certified the housing to withstand two separate 4 Joule (3.0 ft·lb) impacts at -39°C (-38°F) and at 115°C (239°F) . Additionally, CSA verified that samples of the housing and cover withstand a 7 Joule (5.2 ft·lb) impact at ambient room temperature.
The 31000-28-05-20-110-00-02 excels in extreme environments. Its operating temperature range spans from -51°C to +105°C (-60°F to +221°F) , making it suitable for applications ranging from cold outdoor installations to high-temperature machinery compartments.
Its protection ratings ensure reliable operation even when exposed to water, dust, and corrosive elements. The Type 4X rating guarantees protection against corrosion, falling dirt, rain, sleet, snow, and hose-directed water. Meanwhile, the IP66 rating confirms total protection against dust ingress and protection against powerful water jets.
Proper installation of the 31000-28-05-20-110-00-02 ensures optimal performance and longevity. Follow these guidelines for best results:
First, verify that the mounting thread (3/4-14 NPT) matches your application's mounting hole specifications. This thread size is mandatory when ordering the standoff adapter option.
Next, ensure the probe cable length (0.5 meters) and probe penetration depth (11 inches) suit your machinery configuration. The penetration depth determines how far the probe tip extends into the measurement zone, directly affecting signal accuracy.
When tightening the retaining nut, apply the recommended torque of 29.4 N·m (260 in·lb) . Over-tightening may damage the housing or O-ring seals, while under-tightening can lead to leaks or loose connections.
For installations requiring pressure sealing, contact our custom design department for pressure test services, as standard units are not pressure tested before shipment.
Each 31000-28-05-20-110-00-02 order includes the following items:
1 × Proximity probe housing assembly (complete with sleeve and retaining chain)
1 × Neoprene O-ring (pre-installed)
1 × Mounting hardware kit (screws and washers)
1 × Installation instruction sheet
Note: The packaging does not include calibration certificates, warranty documents, or fittings (as specified by option code 00).
All orders are shipped via FedEx , UPS , or DHL . We select the most appropriate carrier based on your destination and delivery requirements. Tracking numbers are provided once your order dispatches.
1. Does the 31000-28-05-20-110-00-02 work with probes other than the 3300 XL 8 mm?
No. This housing is specifically designed for the 3300 XL 8 mm probe . Using other probe models may compromise sealing and measurement accuracy.
2. Can I use this housing in a hazardous area?
Yes. The housing meets CENELEC standard EN50014 for electrostatic dissipation and carries CSA Type 4X and IP66 ratings, making it suitable for many hazardous area installations. However, always verify compliance with your local safety regulations.
3. Why is the mounting thread option 02 mandatory with the standoff adapter?
The 3/4-14 NPT thread (option 02) provides the correct mechanical interface when using the 2.0-inch standoff adapter. Other thread options may not offer adequate support or sealing.
4. What should I do if I need pressure testing for my application?
Contact our custom design department to arrange pressure seal testing. Standard units are not pressure tested prior to shipment, as the housing is not primarily designed for pressure containment.
5. How do I interpret the full model number 31000-28-05-20-110-00-02?
Each segment specifies a configuration option: probe type (28), cable length (05), standoff (20), penetration (110), fittings (00), and mounting thread (02). Refer to the Technical Specifications section above for a complete breakdown.
| Brand Name | |
| Model No. | 31000-28-05-20-110-00-02 |
| Product Type | Probe Housings |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
