Bently Nevada 330708-00-10-50-12-00 Proximity Probe

Bently Nevada 330708-00-10-50-12-00 3300 XL 11 mm Proximity Probe

Product Introduction

The Bently Nevada 330708-00-10-50-12-00 is a high-performance proximity probe from the trusted 3300 XL series. This 11 mm probe provides non-contact displacement and vibration measurements for critical rotating machinery. It comes with a 5.0-meter (16.4 feet) cable length and a miniature coaxial ClickLoc connector for secure termination. Additionally, this model features FluidLoc cable technology for enhanced reliability in wet environments. Made in the U.S.A., it represents Bently Nevada's commitment to precision engineering and industrial durability.

Technical Specifications

The 330708-00-10-50-12-00 offers a probe case thread of 5/8-18 UNF without armor. Its unthreaded length option is 0 inches, while the overall case length measures 1.0 inch. The total length reaches 5.0 meters (16.4 feet) from probe tip to connector. Furthermore, the DC resistance from the center conductor to the outer conductor measures 7.2 ± 0.8 ohms. The probe uses 75 Ω triaxial cable construction with fluoroethylene propylene (FEP) insulation. This configuration ensures excellent signal integrity over the full cable length.

Material and Construction

This probe tip utilizes polyphenylene sulfide (PPS) as its primary material. PPS offers exceptional chemical resistance and dimensional stability across a wide temperature range. Meanwhile, the probe case features AISI 304 stainless steel (SST) for superior corrosion resistance and mechanical strength. The cable insulation uses FEP, which provides reliable electrical properties and thermal stability. Moreover, the miniature coaxial ClickLoc connector ensures a positive locking connection that resists vibration-induced loosening. The FluidLoc cable option adds an extra layer of protection against fluid ingress.

Mechanical and Installation Parameters

The 330708-00-10-50-12-00 requires careful attention to installation torque specifications. The maximum rated torque for the 5/8-18 probe case is 45.2 N•m (400 in•lb), while we recommend 15.2 N•m (133 in•lb) for optimal performance. The maximum length of thread engagement is 0.938 inches. For the connector, we recommend finger-tight installation with a maximum torque of 0.565 N•m (5 in•lb). Additionally, the minimum bend radius for this probe cable is 25.4 mm (1.0 inch), whether armored or unarmored. Following these torque guidelines prevents damage to the probe case and ensures reliable sealing.

Environmental and Temperature Performance

This probe supports operating and storage temperatures from -52°C to +177°C (-62°F to +351°F). However, exposing the probe to temperatures below -34°C (30°F) may cause premature failure of the pressure seal. Therefore, we recommend keeping the probe above this threshold during operation and storage. The Viton O-ring provides the primary sealing mechanism between the probe tip and case. For applications requiring pressure seal testing, please contact our custom design department for special arrangements.

Measurement Capabilities

The 3300 XL 11 mm proximity probe delivers precise displacement measurements for radial vibration and axial position monitoring. It operates effectively with standard 3300 XL extension cables and Proximitor sensors. The probe's linear range and sensitivity characteristics make it suitable for journal bearings, thrust bearings, and compressor applications. Specifically, this 11 mm probe offers enhanced target area coverage compared to smaller 8 mm and 5 mm probes. Consequently, it works well on larger shaft diameters where surface runout may vary. For optimal vibration measurement, pair this probe with the appropriate Bently Nevada extension cable and Proximitor sensor.

Compliance and Certifications

This probe complies with FCC Part 15 rules for electromagnetic interference. It meets the European EMC Directive 2014/30/EU and RoHS Directive 2011/65/EU standards. For maritime applications, it satisfies the 2019 Rules for Conditions of Classification. Additionally, this probe supports functional safety ratings of SIL 2 with HFT = 0 and SIL 3 with HFT = 1 when used in a complete safety system. These certifications confirm its reliability in critical monitoring applications across various industries.

Installation Best Practices

When installing the 330708-00-10-50-12-00, follow these key practices for optimal performance. First, ensure the target surface meets the required finish specifications for eddy current probes. Next, set the proper gap voltage according to your application requirements. For radial vibration monitoring, we recommend a gap setting of approximately -9 Vdc. Additionally, avoid routing the probe cable near high-voltage power lines or variable frequency drives to minimize electromagnetic interference. Use the recommended torque values during installation to prevent damage. Finally, inspect the connector for contamination or damage before making the connection to ensure reliable signal transmission.

Packaging List

• 1 x 3300 XL 11 mm Proximity Probe (5.0-meter cable length)

Shipping Information

We ship all orders via FedEx, UPS, or DHL for fast and secure worldwide delivery.

Frequently Asked Questions (FAQ)

1. What is the difference between the 11 mm probe and the smaller 8 mm or 5 mm probes?
The 11 mm probe offers a larger sensing area and greater target coverage. Therefore, it works better on larger shaft diameters where surface irregularities may affect smaller probes.

2. Can I use this probe without an extension cable?
Yes, you can connect this probe directly to the Proximitor sensor. However, for installations requiring longer reach, we recommend pairing it with a compatible 3300 XL extension cable.

3. What does the FluidLoc cable option provide?
FluidLoc cable technology provides enhanced resistance to fluid ingress along the cable. Consequently, this makes it ideal for wet or oily environments common in turbine and compressor applications.

4. Why is the temperature below -34°C a concern for this probe?
Exposing the probe to temperatures below -34°C may cause premature failure of the Viton O-ring pressure seal. Therefore, we recommend maintaining temperatures above this threshold.

5. Which shipping carriers do you use for delivering this probe?
We use FedEx, UPS, and DHL as our trusted shipping partners to ensure prompt and reliable delivery worldwide.