Bently Nevada 31000-16-10-15-041-03-02 Housing

31000 Proximity Probe Housing with Standoff Adapter

Product Introduction

The Bently Nevada 31000-16-10-15-041-03-02 provides a complete mounting solution for proximity monitoring systems. Specifically, this housing accepts the 3300 XL 8 mm probe and includes a 1.5-inch standoff adapter for extended reach. Furthermore, the 1.0 metre probe cable offers flexible routing options. This configuration proves ideal for machinery with recessed mounting surfaces or limited access points. Meanwhile, the housing maintains the same rugged construction as the entire 31000 series. Its glass-reinforced PPS body and stainless steel hardware deliver long-term durability. Additionally, the advanced fitting package includes multiple cable seal grips and a reducer for various conduit sizes. Therefore, this model adapts easily to different installation scenarios. The Bently Nevada 31000 series continues to set the standard for probe protection in critical rotating machinery.

Technical Specifications

Probe and Cable Configurations

This housing supports the 3300 XL 8 mm probe with a cable length of 1.0 metre (39 inches) . Option code 16 confirms the standard probe type without additional certifications. The standoff adapter option is set to 15, providing a minimum length of 1.5 inches (38 mm) . This extension proves valuable when the probe must bridge a gap between the mounting point and the measurement target. Moreover, the probe penetration option is 041, meaning the probe extends 4.1 inches into the measurement zone. The mounting thread uses 3/4-14 NPT (option 02), which is required when ordering the standoff adapter. Therefore, this configuration offers greater installation flexibility compared to non-standoff versions.

Fittings and Connection Options

The fittings option (03) delivers an exceptionally versatile package. First, it includes two plugs and one 3/4-14 NPT fitting for standard conduit connections. Additionally, a 3/4-14 to 1/2-14 NPT stainless steel reducer allows adaptation to smaller conduits. Furthermore, the set includes a cable seal grip with three interchangeable grommets. Specifically, these grommets accommodate cable diameters of 1/8 to 3/16 inches, 1/4 to 5/16 inches, and 5/16 to 3/8 inches. Therefore, you can use this housing with various cable types without purchasing separate adapters. This thoughtful fitting selection reduces installation time and simplifies inventory management.

Electrical and Environmental Ratings

The housing carries a Type 4X rating certified by the Canadian Standards Association (CSA). In addition, it meets IP66 requirements as verified by test report SC115582-1 (e) 106. This combination ensures complete protection against dust ingress and powerful water jets. Furthermore, the housing complies with CENELEC standard EN50014 for electrostatic dissipation. Specifically, this rating addresses the risks associated with plastic materials in hazardous areas. Consequently, the unit prevents dangerous static discharge in explosive atmospheres. The operating temperature range spans from -51°C to +105°C (-60°F to +221°F) . Therefore, this Bently Nevada 31000 housing performs reliably across a broad spectrum of industrial conditions.

Mechanical and Structural Properties

Materials and Construction

The housing body consists of glass-reinforced Polyphenylene Sulfide (PPS) thermoplastic containing conductive fibers. This material delivers high mechanical strength and excellent chemical resistance. Additionally, the sleeve and retaining chain use AISI 304 stainless steel for superior corrosion protection. The outer sleeve and exterior screws employ AISI 303 stainless steel, which offers good machinability and durability. Meanwhile, the O-ring uses Neoprene to maintain a dependable seal against moisture and contaminants. These carefully selected materials ensure the housing withstands corrosive atmospheres, washdown chemicals, and outdoor exposure.

Strength and Impact Resistance

The housing exhibits outstanding structural integrity under load. For instance, tests confirm 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 in place. 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, vibration, and rough handling without losing probe alignment. The recommended torque for the retaining nut is 29.4 N·m (260 in·lb) .

Installation Guidelines

Mounting with Standoff Adapter

First, clean the mounting surface thoroughly to ensure proper sealing. Next, attach the standoff adapter (1.5-inch length) to the mounting thread using the 3/4-14 NPT connection. Specifically, apply thread sealant to prevent leakage through the adapter threads. Then, thread the 3300 XL 8 mm probe through the housing and standoff assembly. Adjust the probe to achieve the 4.1-inch penetration depth as indicated by option 041. After that, tighten the retaining nut to 29.4 N·m (260 in·lb) . The 1.0 metre cable provides sufficient length for connection to junction boxes or signal conditioners. Additionally, select the appropriate grommet for your cable diameter and install it in the cable seal grip. Finally, use the reducer if your conduit requires the smaller 1/2-14 NPT size.

Cable Routing and Sealing

Proper cable sealing is essential for maintaining the IP66 rating. First, choose the correct grommet based on your cable outer diameter. The three supplied grommets cover diameters from 1/8 inch up to 3/8 inch. Insert the cable through the grommet and tighten the seal grip until it firmly compresses around the cable. Meanwhile, seal any unused ports with the supplied plugs. For installations requiring conduit, connect the 3/4-14 NPT fitting or use the reducer for 1/2-14 NPT connections. Verify that all fittings are tightened to prevent water ingress during washdown cycles.

Environmental Considerations

The operating temperature range is extensive, from -51°C to +105°C. However, avoid rapid temperature changes that might affect measurement accuracy. Furthermore, the IP66 and Type 4X ratings allow outdoor installation and high-pressure washdowns. However, always inspect the O-ring condition before closing the cover. 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 31000-16-10-15-041-03-02 probe housing assembly

• 1 x Standoff adapter (1.5-inch minimum length)

• 1 x Outer sleeve (AISI 303 stainless steel)

• 1 x Retaining chain (AISI 304 stainless steel)

• 1 x 3/4-14 NPT fitting

• 1 x 3/4-14 to 1/2-14 NPT stainless steel reducer

• 2 x Plugs for unused ports

• 1 x Cable seal grip with three grommets (1/8-3/16", 1/4-5/16", 5/16-3/8")

• 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 purpose of the standoff adapter?
The 1.5-inch standoff adapter extends the mounting distance, allowing the Bently Nevada 31000 housing to reach recessed measurement points or clear obstacles near the mounting surface.

2. Which cable sizes work with the supplied seal grip?
The included cable seal grip comes with three grommets for cable diameters of 1/8 to 3/16 inches, 1/4 to 5/16 inches, and 5/16 to 3/8 inches.

3. Can I use this housing without the reducer?
Yes. Use the 3/4-14 NPT fitting directly for standard conduit connections. The reducer is only needed if you require a smaller 1/2-14 NPT connection.

4. What is the probe penetration depth for this model?
Option 041 sets the probe penetration at 4.1 inches. This depth is measured from the mounting reference point with the standoff adapter installed.

5. Does the 1.0 metre cable come pre-attached to the probe?
Yes. The 3300 XL 8 mm probe includes a 1.0 metre cable as specified by option code 10. The probe and cable are supplied as a single assembly.