Industrial-Grade Sensor Shielding

The Bently Nevada 31000-28-10-00-017-00-02 External Probe Housing Assembly provides a critical environmental and mechanical barrier for proximity sensors in demanding industrial landscapes. Engineered for high-speed rotating machinery, this assembly allows for the external installation and precision gapping of proximity probes without requiring a machine shutdown. It excels in protecting sensitive transducer connections from moisture, oil mist, and corrosive chemical exposure. By facilitating live-gap adjustments, it ensures that your Bently Nevada 3500 Machinery Protection System receives uninterrupted, high-fidelity data, safeguarding multi-million dollar assets such as steam turbines, centrifugal compressors, and large-scale industrial pumps from catastrophic mechanical excursions.

Engineering Configuration & Suffix Logic

31000 - Model Series

Specifies the Explosion-Proof External Probe Housing. The primary body is constructed from low-copper aluminum, providing a lightweight yet rugged enclosure that resists atmospheric corrosion.

28 - Probe Threaded Length (Dimension A)

Designates a 2.8-inch (71.1 mm) internal threaded length. This dimension determines the maximum adjustable travel for the probe to reach the shaft target area.

10 - Proximity Probe Type

Indicates compatibility with 3300 XL 8mm proximity probes. The internal hardware is specifically machined to secure the 3/8-24 UNF threads typical of this sensor series.

00 - Fitting Option

Designates that no additional fittings are factory-installed. This allows field engineers to select and install the specific conduit or cable glands required for their local electrical standards.

017 - Sleeve Length (Dimension L)

Represents a 1.7-inch (43.2 mm) sleeve length. This reach dimension ensures the probe tip is correctly positioned relative to the shaft based on the thickness of the machine's bearing cap or casing.

00 - Sleeve Thread Series

Specifies a 3/4-14 NPT mounting thread for the stainless steel sleeve, providing a standard, high-pressure mechanical interface for industrial housings.

02 - Agency Approval Option

Confirms North American CSA/NRTL/C explosion-proof ratings. This ensures safe operation in Class I, Division 1 and 2 environments, meeting the strictest safety codes for petrochemical and power facilities.

Physical & Mechanical Attributes

Field Commissioning Protocol

Rigid mounting is essential to prevent housing resonance from introducing artificial vibration signals into the proximity data. When installing the probe, utilize a digital multimeter to monitor the DC bias voltage at the Proximitor; once the center-range gap voltage (typically -10V) is achieved, secure the internal lock-nut to prevent drift. For explosion-proof installations under the -02 approval, you must install a certified conduit seal within 18 inches of the housing to prevent gas migration through the electrical conduit system.

Performance Edge in Critical Environments

The 31000-28-10-00-017-00-02 provides a significant operational advantage by enabling "Live-Gapping." Technicians can replace faulty sensors or recalibrate gaps while the machine is at full load, effectively eliminating the need for costly production stops just for sensor maintenance. The epoxy-coated aluminum body dissipates heat efficiently while the stainless steel sleeve maintains mechanical integrity under thermal expansion. This assembly integrates seamlessly with Bently Nevada 3500 monitors and high-level DCS platforms such as Honeywell Experion PKS, ensuring robust asset health visibility 24/7.

Fulfillment & Packaging Standards

Delivery time: 3-5 days when payment finish, BY DHL/FEDEX/UPS.

Every housing assembly is shipped in anti-static industrial packaging with reinforced internal supports to protect the stainless steel sleeve and the precision-machined threads during global transit.

Technical Support FAQs

Q1: What is the benefit of the 1.7-inch (017) sleeve length?

A1: This length represents the "reach" of the housing into your machine. It is specifically selected to match machine casings where a short standoff is required to place the probe tip within the linear range of the shaft.

Q2: Can I use this housing for a 5mm or 11mm probe?

A2: No. The -10 suffix in this part number is specifically machined for 8mm (3300 XL) probes. Using a different probe diameter will prevent proper sealing and mechanical securement.

Q3: How do I prevent moisture ingress through the conduit entry?

A3: We recommend using a high-quality thread sealant on the 1/2-14 NPT conduit entry and ensuring the housing cover O-ring is lightly lubricated with silicone grease before final tightening.