Bently Nevada 31000-16-05-20-040-02-02 Probe Housing

31000 Proximity Probe Housing – Bently Nevada 31000-16-05-20-040-02-02

Product Introduction

The Bently Nevada 31000-16-05-20-040-02-02 is a rugged probe housing designed to protect and position 3300 XL 8 mm proximity probes in demanding industrial applications. This housing ensures reliable transducer operation even in hazardous or wet environments, thanks to its IP66 and Type 4X protection ratings. The glass‑reinforced PPS thermoplastic construction provides excellent strength and chemical resistance while remaining lightweight.

This model includes a 0.5‑meter probe cable, a 2.0‑inch standoff adapter, and a 4‑inch probe penetration length. The 02 fittings option supplies two 3/4‑14 NPT fittings and one plug, while the mounting thread option is 3/4‑14 NPT, which is required when ordering the standoff adapter. Additionally, the housing features AISI 304 stainless steel sleeve material and AISI 303 stainless steel outer sleeve and screws, ensuring long‑term corrosion resistance.

Engineers frequently choose this 31000 probe housing for steam turbines, gas compressors, and large pumps where probe stability and environmental sealing are critical. Its wide temperature range of ‑51°C to +105°C accommodates both freezing outdoor conditions and high‑temperature machinery compartments.

Protection Ratings and Certifications

The Bently Nevada 31000-16-05-20-040-02-02 carries multiple independent certifications that verify its suitability for harsh and hazardous areas. The Canadian Standards Association (CSA) has certified this housing to Type 4X rating, which ensures protection against corrosion, falling dirt, rain, sleet, snow, and hose‑directed water. Furthermore, testing per SC115582‑1 (e) 106 confirms an IP66 rating, meaning the housing is completely dust‑tight and protected against powerful water jets.

For hazardous area applications, this housing meets CENELEC standard EN50014 for electrostatic dissipation of plastic materials. This rating is particularly important when the housing is installed in potentially explosive atmospheres, as it prevents static charge accumulation that could ignite flammable gases or dust. Meanwhile, BASEEFA certification verifies that the housing withstands two separate 4 Joule (3.0 ft·lb) impacts at both ‑39°C and 115°C, demonstrating exceptional mechanical resilience across the full temperature spectrum. Additionally, CSA verified that samples withstand a 7 Joule (5.2 ft·lb) impact at room temperature.

Construction and Materials

Housing Body – The main housing is molded from glass‑reinforced polyphenylene sulfide (PPS) thermoplastic containing conductive fibers. This material offers excellent dimensional stability, chemical resistance, and structural strength while remaining non‑corrosive and lightweight. The conductive fibers provide the electrostatic dissipation required for hazardous area installations.

Hardware and Seals – The sleeve and retaining chain are manufactured from AISI 304 stainless steel, which provides good corrosion resistance and mechanical strength. The outer sleeve and exterior screws use AISI 303 stainless steel, known for its excellent machinability and moderate corrosion resistance. Neoprene® O‑rings create a positive seal between housing components, preventing ingress of moisture, dust, and process contaminants.

Mechanical Strength – Beyond impact resistance, the housing demonstrates impressive load‑bearing capacity. In typical testing, the outer sleeve mounted on a test stand with its axis parallel to horizontal supported 912 N (205 lb) placed approximately 38 mm from the unsupported end, with the cover fastened and grounding liner installed. This structural integrity ensures that the probe remains stable even under vibration and mechanical stress.

Installation Guidelines

Proper installation of the 31000-16-05-20-040-02-02 ensures optimal probe performance and long service life. First, verify that the mounting surface is clean and free of debris. Next, thread the housing into the machine port using the 3/4‑14 NPT mounting thread, applying the recommended retaining nut torque of 29.4 N·m (260 in·lb). This torque value ensures a secure, leak‑tight seal without damaging the housing or the machine port.

Then, insert the 3300 XL 8 mm probe through the housing, adjusting the standoff adapter to achieve the desired probe penetration of 4 inches. The 2.0‑inch standoff adapter allows precise positioning relative to the target surface. After positioning, tighten the exterior screws to lock the probe in place. Finally, connect the probe cable to the extension cable or Proximitor Sensor, ensuring that the connector protector (if used) is properly installed to seal against moisture.

For hazardous area installations, always ensure that the housing grounding liner is correctly installed and that the cover is securely fastened. This step maintains the electrostatic dissipation path required by EN50014. Additionally, periodic inspection of the O‑rings and seals is recommended to confirm continued environmental protection.

Packaging List

• 1 x 31000-16-05-20-040-02-02 31000 Proximity Probe Housing (complete assembly)

• 1 x 0.5‑m probe cable (pre‑installed)

• 1 x 2.0‑in standoff adapter

• 1 x Set of two 3/4‑14 NPT fittings and one plug

• 1 x Grounding liner (pre‑installed)

• 1 x Installation instruction manual

Shipping method: FedEx, UPS, or DHL (depending on destination and urgency).

Frequently Asked Questions (FAQ)

1. Which probes are compatible with this 31000 housing?
This housing is specifically designed for 3300 XL 8 mm probes, as indicated by the 16 probe option code. It may not accommodate other probe diameters without appropriate adapters.

2. What is the purpose of the standoff adapter option?
The 2.0‑inch standoff adapter (option 20) provides precise spacing between the housing and the target surface. This adjustment ensures the probe operates within its optimal linear range, typically 0.5 to 4.5 mm from the target.

3. Can this housing be used in Class I Division 1 hazardous areas?
Yes, the housing carries CENELEC EN50014 electrostatic dissipation certification and CSA Type 4X rating, making it suitable for many hazardous area classifications. However, always verify local regulations and the complete system certification before installation.

4. How do I maintain the IP66 seal over time?
Regularly inspect the Neoprene® O‑rings for signs of wear, cracking, or compression set. Replace any damaged seals immediately. Also, ensure that all cover screws are tightened to the specified torque to maintain the seal integrity.

5. What is the maximum operating temperature for this housing?
The rated temperature range is ‑51°C to +105°C (‑60°F to +221°F). Exceeding these limits may degrade the PPS material or compromise the seals. For higher temperatures, consult Bently Nevada for alternative housing options.