Bently Nevada 330876-03-10-00-00 50mm Probe

Bently Nevada 330876-03-10-00-00 3300 XL 50mm Proximity Probe

Product Introduction

The 330876-03-10-00-00 belongs to Bently Nevada’s trusted 3300 XL series. This 50 mm proximity probe is purpose-built for the harshest steam turbine environments, especially in DE (differential expansion) monitoring. Its rugged construction ensures stable, repeatable measurements even when temperatures soar. Meanwhile, the side-exit case simplifies installation in confined spaces. This model comes with a 1.0 meter high-temperature FluidLoc cable, which resists moisture ingress effectively. Consequently, plant engineers gain a durable sensing solution that reduces unplanned downtime. The probe also features standard ClickLoc connectors with removable collars, making cable routing through tight clearances much easier.

Key Technical Specifications

First, let us examine the core electrical parameters. The 330876-03-10-00-00 probe has a DC resistance of 6.4 ± 0.5 Ω between the center and coaxial conductors. This consistency ensures reliable signal transmission to your monitoring system. Additionally, the probe uses a 75 Ω triaxial cable design, which minimizes signal loss over distance. The total length option for this unit is 1.0 meter, roughly 3.3 feet, which suits many standard turbine installations. Furthermore, the probe tip is manufactured from Polyphenylene Sulfide (PPS), a material chosen for its thermal stability and chemical resistance. Its case, on the other hand, is machined from AISI 304 stainless steel, providing excellent corrosion protection.

High-Temperature Performance and Durability

This probe truly excels in high-heat applications. Specifically, it operates continuously within a range of -35°C to +200°C (-31°F to +392°F). Moreover, it withstands short-term exposures up to +250°C (+482°F) for less than 24 hours. Such resilience makes it ideal for steam turbine DE monitoring, where temperature spikes are common. Besides its thermal capacity, the 330876-03-10-00-00 incorporates both front and rear seals. These seals, combined with the High Temperature FluidLoc cable, effectively block moisture from penetrating the probe tip. Therefore, internal components remain dry and accurate over extended service intervals.

Mechanical Design and Mounting Options

The probe case type for this model is the smooth 1.99-inch diameter side-exit version. It includes two ¼-20 mounting holes located at the rear of the case, which simplify secure attachment. For straight-exit variants, ½-20 or M14x1.5 threads are available, but this side-exit design offers unique advantages. Specifically, its low-profile exit angle reduces stress on the cable and connector. In addition, the ClickLoc connector includes a removable collar. This feature allows technicians to route the cable through narrow passages before locking the connection securely. Every probe and cable shipment also includes connector protectors and a disposable installation tool, keeping the contacts contamination-free during setup.

Environmental and Storage Guidelines

When not in operation, the 330876-03-10-00-00 should be stored within the same temperature range of -35°C to +200°C. For brief periods, storage at 250°C is permissible but must not exceed 24 hours. The PFA-insulated cable maintains its flexibility and insulating properties across this entire spectrum. Meanwhile, the stainless steel case resists oxidation and mechanical damage. Consequently, this probe remains a reliable choice for both indoor turbine decks and outdoor auxiliary skids.

Installation Best Practices

Proper installation ensures optimal performance from your 3300 XL system. First, always inspect the connector protectors before removing them. Next, use the provided disposable tool to install the connector protector correctly, preventing any debris from entering the triaxial interface. Additionally, when routing the cable, take advantage of the removable collar on the ClickLoc connector. This collar simplifies pulling the cable through conduit or small openings. After routing, reattach the collar and tighten the connection firmly. Finally, secure the probe using the two ¼-20 mounting holes, ensuring the tip gap matches your target specifications. Remember, the smooth case design requires careful alignment to avoid binding.

Packaging and Logistics Details

Every new 330876-03-10-00-00 probe arrives in factory-fresh packaging, ensuring it reaches you without damage. The shipment includes the probe assembly with its attached 1.0-meter High Temperature FluidLoc cable. Additionally, you will find one set of connector protectors and one disposable connector protector installation tool. For your convenience, we ship all orders via FedEx, UPS, or DHL. These carriers provide reliable tracking and fast delivery to most industrial locations worldwide.

Frequently Asked Questions (FAQ)

1. Can I use the 330876-03-10-00-00 probe in a gearbox application?
Yes, but its primary design targets steam turbine DE monitoring. It works well in any high-temperature, moisture-prone environment requiring 50 mm probe length. However, always verify the tip material compatibility with your specific media.

2. What is the difference between side-exit and straight-exit cases?
The side-exit case routes the cable at a 90° angle from the probe axis, which reduces bend radius stress. Straight-exit models have axial cable exit. The 330876-03-10-00-00 side-exit version is often preferred when clearance is limited near the mounting point.

3. How do I clean the probe tip if it gets contaminated?
Gently wipe the PPS tip with isopropyl alcohol and a lint-free cloth. Avoid abrasive materials that could scratch the surface. Never submerge the probe, as the FluidLoc cable protects against moisture but is not designed for immersion.

4. Does this probe work with extension cables from other brands?
For best accuracy, always use Bently Nevada 3300 XL extension cables. Third-party cables may alter the resistance or capacitance, affecting the linearity. The 330876-03-10-00-00 is calibrated with genuine Bently Nevada cables.

5. What is the typical delivery time for this probe?
Stock items ship within 24–48 hours via FedEx, UPS, or DHL. Custom lengths or special approvals may extend lead times. Please contact our sales team for current availability.