This Bently Nevada 31000-28-05-00-037-03-02 proximity probe housing delivers reliable sensor protection for critical rotating machinery. Specifically engineered for the 3300 XL 8 mm probe, this housing ensures stable probe positioning in demanding applications like steam turbines, gas compressors, and large pumps.
The 31000-28-05-00-037-03-02 comes with a 0.5 metre (20-inch) probe cable length option. It includes a 3.7-inch probe penetration depth, which suits most standard mounting configurations. For installation, this unit provides a 3/4-14 NPT mounting thread along with two plugs and one 3/4-14 to 1/2-14 NPT stainless steel reducer. Additionally, the fittings package contains a cable seal grip with three interchangeable grommets that accommodate cable diameters from 1/8 to 3/8 inches.
This housing incorporates a glass-reinforced PPS thermoplastic body with conductive fibers for electrostatic dissipation. Meanwhile, the sleeve and retaining chain use AISI 304 stainless steel, while the outer sleeve and exterior screws are made from AISI 303 stainless steel. Neoprene O-rings provide the primary sealing interface between sleeve and housing.
This housing holds multiple protection ratings that make it suitable for outdoor and hazardous locations. First, it carries a Type 4X rating certified by CSA, which ensures corrosion resistance and water ingress protection. Next, the IP66 rating verifies complete protection against dust and powerful water jets. Furthermore, the housing meets CENELEC standard EN50014 for electrostatic dissipation of plastic materials in hazardous areas.
Regarding impact resistance, BASEEFA certified this unit to withstand two separate 4 Joule impacts at both -39°C and +115°C. Moreover, CSA verified that samples withstand a 7 Joule impact at room temperature. The housing also supports 912 N (205 lb) of static load when mounted properly. Therefore, this Bently Nevada 31000 housing delivers exceptional mechanical ruggedness for long-term field service.
The operating temperature range spans from -51°C to +105°C (-60°F to +221°F), making this housing viable for extreme cold and high-heat processes. However, users should note that while the housing seals against hose-directed water per NEMA 4X and IP66 standards, it is not pressure-rated for internal or external pressurization. The internal sealing uses a Viton O-ring inside the probe case, paired with a Neoprene O-ring between sleeve and housing. For applications requiring pressure seal verification, Bently Nevada recommends contacting their custom design department for testing services.
Proper installation of the 31000-28-05-00-037-03-02 requires attention to torque specifications. The retaining nut should be tightened to 29.4 N·m (260 in·lb) for secure mounting. Additionally, ensure the 3/4-14 NPT thread is clean and properly sealed to maintain the IP66 rating. When routing the probe cable, select the appropriate grommet from the supplied set to match your cable diameter—this prevents strain and maintains the environmental seal. For optimal performance, mount the housing with the cover fastened and the grounding liner installed, as this configuration passed the 912 N load test.
1 x Bently Nevada 31000-28-05-00-037-03-02 probe housing assembly
1 x 3/4-14 NPT fitting plug (two plugs total)
1 x 3/4-14 to 1/2-14 NPT stainless steel reducer
1 x Cable seal grip with three grommets (1/8–3/16″, 1/4–5/16″, 5/16–3/8″)
1 x Retaining chain (AISI 304 stainless steel)
1 x Installation instruction sheet
Shipping Method : FedEx, UPS, or DHL (door-to-door delivery)
1. Which probe is compatible with the 31000-28-05-00-037-03-02 housing?
This housing is specifically designed for the Bently Nevada 3300 XL 8 mm probe with connector options. It does not support other probe sizes or brands.
2. Can this housing be used in sub-zero environments?
Yes, absolutely. The temperature rating goes down to -51°C (-60°F), and the impact strength was verified at -39°C, so it performs reliably in freezing conditions.
3. Is this housing pressure-tested before shipping?
No, standard production units are not pressure tested. However, you can request custom pressure seal testing through Bently Nevada's custom design department before shipment.
4. What torque should I apply to the retaining nut?
The recommended torque for the retaining nut is 29.4 N·m (260 in·lb) . Applying the correct torque ensures proper sealing and prevents thread damage.
5. Does this housing include the probe itself?
No, this is a housing assembly only. The 3300 XL 8 mm probe and its cable are sold separately. This product provides the protective mounting enclosure and fittings.
| Brand Name | |
| Model No. | 31000-28-05-00-037-03-02 |
| Product Type | Probe Housings |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
