Bently Nevada 31000-28-05-00-025-01-02 Probe Housing

31000 Proximity Probe Housing for 3300 XL Probes

Product Introduction

The Bently Nevada 31000-28-05-00-025-01-02 delivers reliable probe protection for critical machinery monitoring. Specifically, this housing accommodates the 3300 XL 8 mm probe with multiple agency approvals for enhanced safety. Furthermore, its compact design features a shallow 2.5-inch penetration depth, making it suitable for tight mounting locations. The 0.5-metre cable provides adequate reach for nearby junction boxes or signal conditioners. Meanwhile, the housing includes one 3/4-14 NPT fitting and two plugs for simple conduit connections. This model suits applications where limited space and high reliability are essential, such as steam turbines, compressors, and pumps. Additionally, the rugged PPS construction ensures long service life in aggressive industrial environments. The Bently Nevada 31000 series consistently delivers superior performance in vibration and position monitoring systems.

Technical Specifications

Probe and Cable Configurations

This housing supports the 3300 XL 8 mm probe with connector and multiple approvals, as indicated by option code 28. The probe cable measures 0.5 metre (20 inches) , which suits installations requiring short cable runs. Option 00 confirms that no standoff adapter is included, keeping the assembly compact and straightforward. Moreover, the probe penetration option is 025, providing a 2.5-inch insertion depth. This shallow penetration works well for machines with limited clearance between the mounting surface and the rotating shaft. The mounting thread uses 3/4-14 NPT (option 02), which is standard for this housing series. Therefore, this configuration offers a simple, cost-effective solution without unnecessary components.

Fittings and Connection Options

The fittings option (01) provides a practical and uncomplicated connection package. First, it includes one 3/4-14 NPT fitting for conduit attachment. Additionally, two plugs are supplied to seal any unused ports. This arrangement allows for a single cable entry point while maintaining the IP66 seal on all other openings. The straightforward design reduces installation complexity and potential leak points. Therefore, this model proves ideal for applications where only one conduit connection is required.

Electrical and Environmental Ratings

The housing carries a Type 4X rating certified by the Canadian Standards Association (CSA). In addition, it meets IP66 requirements, verified by test report SC115582-1 (e) 106. This combination ensures total protection against dust ingress and high-pressure water jets. Furthermore, the housing complies with CENELEC standard EN50014 for electrostatic dissipation of plastic materials in hazardous areas. Consequently, the unit prevents dangerous static charge accumulation in explosive atmospheres. The operating temperature range extends from -51°C to +105°C (-60°F to +221°F) . Therefore, this Bently Nevada 31000 housing performs reliably in both extreme cold and intense heat.

Mechanical and Structural Properties

Materials and Construction

The housing body uses glass-reinforced Polyphenylene Sulfide (PPS) thermoplastic with conductive fibers. This advanced material offers outstanding mechanical strength and resistance to chemicals and solvents. Additionally, the sleeve and retaining chain are made from AISI 304 stainless steel for excellent corrosion resistance. The outer sleeve and exterior screws employ AISI 303 stainless steel, which provides good machinability and durable performance. Meanwhile, the O-ring is constructed from Neoprene to ensure a dependable seal against moisture, dust, and contaminants. These premium materials guarantee the housing withstands harsh industrial conditions over many years of service.

Strength and Impact Resistance

The housing exhibits impressive structural strength under operational loads. For instance, tests demonstrate the outer sleeve supports 912 N (205 lb) when mounted horizontally with the housing attached through an end hole. This load was applied 38 mm (1.5 inches) from the unsupported end with the cover fastened. Moreover, BASEEFA certified the impact strength to withstand two separate 4 Joule (3.0 ft·lb) impacts at both -39°C (-38°F) and 115°C (239°F). In addition, CSA verified that housing and cover samples survive a 7 Joule (5.2 ft·lb) impact at ambient room temperature. Therefore, this housing resists accidental impacts and mechanical vibration without compromising probe alignment. The recommended torque for the retaining nut is 29.4 N·m (260 in·lb) .

Installation Guidelines

Mounting and Probe Setup

First, prepare the mounting surface by cleaning it thoroughly to remove debris or old sealant. Next, thread the 3300 XL 8 mm probe through the housing using the 3/4-14 NPT mounting thread. Specifically, insert the probe to achieve the 2.5-inch penetration depth as specified by option 025. Then, tighten the retaining nut to the recommended torque of 29.4 N·m (260 in·lb) . Additionally, connect the 0.5-metre probe cable to your monitoring system or junction box. The single 3/4-14 NPT fitting allows for one conduit entry, while the two plugs seal the remaining ports. For installations with multiple cables, consider selecting a different fittings option. Finally, verify that the grounding liner is correctly installed to maintain electrostatic dissipation performance.

Sealing and Environmental Protection

Proper sealing is critical to maintain the IP66 and Type 4X ratings. First, ensure the O-ring is clean and undamaged before closing the cover. Apply a thin layer of silicone grease to the O-ring if recommended by your maintenance procedures. Then, tighten the cover screws evenly to achieve uniform compression of the seal. Meanwhile, verify that the conduit fitting is tightened to prevent water ingress. The two plugs should be securely installed in any unused ports. For installations in washdown areas, consider applying thread sealant to all connections for added protection.

Environmental Considerations

The operating temperature range is exceptionally broad, from -51°C to +105°C. However, avoid subjecting the housing to rapid thermal shocks that might affect measurement accuracy. Furthermore, the IP66 and Type 4X ratings allow for outdoor installation and exposure to high-pressure washdowns. However, always inspect the O-ring condition before closing the cover after maintenance. Periodic re-torque of the retaining nut is recommended to maintain secure probe positioning. For hazardous area installations, comply with local regulations regarding EN50014 electrostatic dissipation requirements.

Packaging List

• 1 x Bently Nevada 31000-28-05-00-025-01-02 probe housing assembly

• 1 x Outer sleeve (AISI 303 stainless steel)

• 1 x Retaining chain (AISI 304 stainless steel)

• 1 x 3/4-14 NPT fitting

• 2 x Plugs for unused ports

• 1 x Neoprene O-ring (pre-installed)

• 1 x Grounding liner

• 1 x Installation instruction sheet

Shipping Method: FedEx, UPS, DHL

Frequently Asked Questions

1. What is the probe penetration depth for this model?
This housing provides a 2.5-inch penetration depth as indicated by option 025. This shallow depth suits applications with limited clearance.

2. Which probe is compatible with this housing?
The Bently Nevada 31000-28-05-00-025-01-02 accepts the 3300 XL 8 mm probe with multiple approvals, as specified by option code 28.

3. Does this housing include a standoff adapter?
No. Option 00 means no standoff adapter is supplied. This keeps the assembly compact and simple for direct mounting.

4. How many conduit fittings are included?
This model includes one 3/4-14 NPT fitting and two plugs. This arrangement suits installations requiring a single cable entry point.

5. What is the cable length supplied with this housing?
The probe comes with a 0.5-metre (20-inch) cable, which is sufficient for connections to nearby monitoring equipment.