Bently Nevada 330876-01-90-00-05 3300 XL 50mm Probe

Product Introduction

The Bently Nevada 330876-01-90-00-05 is a high-performance 50 mm proximity probe from the renowned 3300 XL series. Designed specifically for severe steam turbine DE (direct extraction) environments, this probe maintains exceptional accuracy even under extreme heat. It operates continuously at 200°C (392°F) and survives short-term spikes up to 250°C (482°F) for less than 24 hours.

What sets this model apart is its straight exit case with ½-20 threads and multiple agency approvals. The 9.0-meter (29.5 feet) total length gives you extended reach for remote monitoring installations. Furthermore, the high-temperature FluidLoc cable and ClickLoc connectors deliver reliable signal transmission while resisting moisture and heat damage. Each probe arrives with connector protectors and a disposable installation tool to ensure contamination-free setup.

Technical Specifications

The 330876-01-90-00-05 probe uses a 75 Ω triaxial cable with PFA insulation and high-temperature FluidLoc construction. The total cable length measures 9.0 meters, designed for applications requiring extended separation between the probe and Proximitor sensor.

Key electrical parameters:

• DC resistance from center to coaxial conductor: 8.9 ± 1.1 Ω

• Cable impedance: 75 Ω triaxial

• Tip material: Polyphenylene Sulfide (PPS)

• Case material: AISI 304 stainless steel (SST)

• Case thread: ½-20 English

• Maximum thread engagement: 0.750 inches

The straight exit case style features a locknut with predrilled safety wire holes for secure mounting. Overall case diameter measures 1.99 inches, consistent across all 3300 XL 50 mm probes. Additionally, this model carries multiple agency approvals (suffix -05), making it suitable for regulated industrial facilities worldwide.

Mechanical and Environmental Ratings

This probe delivers reliable performance across a broad temperature range. Standard operation spans from -35°C to +200°C (-31°F to +392°F). Moreover, it withstands intermittent exposure to +250°C (+482°F) for periods shorter than 24 hours.

The armored high-temperature FluidLoc cable provides exceptional protection against moisture ingress. Front and rear seals combine with the cable design to prevent humidity from reaching the probe tip. The AISI 304 stainless steel case resists corrosion and mechanical stress. Consequently, this probe maintains measurement stability in the harshest power generation and heavy industrial environments.

Installation Guidelines

Installing the Bently Nevada 3300 XL 50 mm proximity probe requires careful attention to thread engagement and cable routing. First, verify the mounting hole matches the ½-20 thread specification. The maximum thread engagement is 0.750 inches—do not exceed this limit to avoid damaging the probe case.

For straight exit models, use the included locknut with safety wire holes to secure the probe position. Thread the probe into the mounting fixture until the tip reaches the correct gap distance. Next, route the 9.0-meter cable toward the Proximitor sensor location. The ClickLoc connector features a removable collar that helps pass the cable through tight clearances. After routing, reattach the collar and connect the probe to your monitoring system.

Always use the supplied disposable installation tool to fit the connector protector. This step keeps the connector clean during installation and prevents contamination-related measurement errors.

Packaging List

Each new original 330876-01-90-00-05 unit comes in factory-sealed packaging. The box includes:

• 1 x 3300 XL 50 mm Proximity Probe (straight exit, ½-20 thread, 9.0m cable)

• 1 x Locknut with predrilled safety wire holes

• 1 x Connector protector (pre-installed)

• 1 x Disposable connector protector installation tool

• 1 x Removable collar for ClickLoc connector

Note: Certificates and warranty documents are not included in the package.

Shipping Information

All orders ship via FedEx, UPS, or DHL with full tracking. International delivery typically takes 3–7 business days. Express shipping options are available for urgent requirements.

Frequently Asked Questions

1. Can I use this 9.0-meter probe with a standard Proximitor sensor?
Yes, but only with Proximitor sensors designed to support 9.0-meter cable lengths. Always verify your sensor's compatibility before installation.

2. What do the multiple agency approvals cover?
The -05 suffix indicates approvals for hazardous area installations, including ATEX, CSA, and IECEx certifications. These approvals make the probe suitable for use in explosive atmospheres.

3. How does the straight exit design differ from side exit?
The straight exit cable exits axially from the probe rear, making it ideal for installations with straight-through mounting holes. The side exit version routes the cable perpendicularly for tight spaces.

4. What is the maximum thread engagement length?
The maximum thread engagement is 0.750 inches. Exceeding this depth can damage the probe case or affect measurement accuracy.

5. Is the FluidLoc cable resistant to steam and moisture?
Absolutely. The high-temperature FluidLoc cable is specifically engineered to block moisture ingress. Combined with the front and rear seals, it provides excellent protection in steam turbine DE environments.