Product Introduction
The 31000-28-10-00-020-03-02 is part of the Bently Nevada 31000 Series of proximity probe housings. This assembly protects radially mounted 3300 XL 8mm probes used for vibration and Keyphasor measurements. Specifically, it lets maintenance teams adjust probe gap or swap the probe without opening the machine casing. Therefore, the housing shortens downtime on turbines, compressors, and large motors.
Technical Specifications
This housing ships with a 3300 XL 8mm probe carrying multiple approvals and a 1.0 m (39 in) probe cable. The probe penetration depth is 2.0 inches, which fits standard casing wall thicknesses. Additionally, the mounting thread is a 3/4-14 NPT connection for direct installation.
The fittings option includes two plugs, one 3/4-14 NPT fitting, and one 3/4-14 to 1/2-14 NPT stainless steel reducer. Moreover, a cable seal grip with grommets supports cable sizes from 1/8 to 3/8 inches. No standoff adapter is included in this configuration.
The housing body uses glass-reinforced polyphenylene sulfide (PPS) thermoplastic with conductive fibers. Meanwhile, the sleeve and retaining chain are made of AISI 304 stainless steel. The outer sleeve and exterior screws use AISI 303 stainless steel, and the O-ring material is Neoprene.
Mechanical and Environmental Parameters
The 31000-28-10-00-020-03-02 holds a Type 4X rating certified by CSA and an IP66 rating for dust and water ingress. It also meets CENELEC EN50014 standards for electrostatic dissipation in hazardous areas. The temperature rating spans -51°C to +105°C (-60°F to +221°F).
For impact strength, BASEEFA certified the housing to withstand two separate 4 Joule impacts at -39°C and at 115°C. Moreover, CSA verified samples to survive a 7 Joule impact at room temperature. The recommended retaining nut torque is 29.4 N·m (260 in·lb), and the typical weight is 1.2 kg.
Regarding pressure, the assembly seals differential pressure between the probe tip and housing body when paired with a 3300 XL 8mm probe. The internal probe case seal uses a Viton O-ring. However, the plastic housing is not designed to resist internal or external pressure, and probes are not pressure tested before shipment.
Installation Guide
First, confirm the casing port matches the 3/4-14 NPT mounting thread. Next, insert the probe assembly and set the penetration to the required 2.0-inch depth. Then, tighten the retaining nut to 29.4 N·m. After that, install the cable seal grip and select the correct grommet for your cable size. Finally, connect the probe to the extension cable and verify gap voltage before startup.
Packaging List
31000-28-10-00-020-03-02 housing assembly (1 unit)
3300 XL 8mm probe with 1.0 m cable (pre-installed)
3/4-14 NPT fitting and two plugs
3/4-14 to 1/2-14 NPT stainless steel reducer
Cable seal grip with grommet set
Neoprene O-ring (pre-installed)
Protective shipping carton
FAQ
Q1: What probe does this housing include?
A: The 31000-28-10-00-020-03-02 ships with a 3300 XL 8mm probe featuring multiple approvals and a 1.0-meter cable.
Q2: What is the probe penetration depth?
A: This configuration provides a 2.0-inch probe penetration depth for standard casing walls.
Q3: Is the housing pressure rated?
A: No. It seals differential pressure at the probe tip but is not designed to resist internal or external pressure.
Q4: What cable sizes do the grommets fit?
A: The grommet set covers cables from 1/8 to 3/8 inches in diameter.
Q5: What shipping methods do you offer?
A: We ship via Fedex, UPS, and DHL. Orders usually dispatch within 3 to 5 business days after payment confirmation.
