Bently Nevada 330105-02-12-05-02-01 8mm Probe 0.5m

Bently Nevada 330105-02-12-05-02-01 3300 XL 8 mm Reverse Mount Probe

Product Introduction

The Bently Nevada 330105-02-12-05-02-01 belongs to the trusted 3300 XL 8 mm series of reverse mount proximity probes. This particular model offers a compact 0.5-meter cable length, making it an excellent choice for installations with short routing distances. The 3300 XL 8 mm series is widely recognized for its exceptional linearity and stability in demanding turbomachinery environments. Moreover, this probe incorporates the reliable ClickLoc connector system, which ensures a secure and vibration-proof electrical connection. The reverse mount design allows installation from behind the mounting surface, providing flexibility in mechanical arrangement. Compared to standard mount probes, this configuration often simplifies installation in confined spaces.

Technical Specifications of the 330105-02-12-05-02-01

Electrical Parameters

The 330105-02-12-05-02-01 exhibits a nominal DC resistance of 7.45 ± 0.50 ohms measured from the center conductor to the outer conductor. This resistance value is factory-calibrated for the specific 0.5-meter cable length. The probe operates with a 75Ω triaxial cable, using fluoroethylene propylene (FEP) insulation for the standard configuration. The linear range for this 8 mm probe extends to 2 mm (80 mils), providing ample measurement window for most monitoring applications. The system accepts field wiring from 0.2 to 1.5 mm² (16 to 24 AWG). For optimal signal integrity, we recommend using a three-conductor shielded triad cable for field wiring extensions. The maximum allowable distance between the probe and the monitor reaches 305 meters (1,000 feet) with proper cable selection.

Mechanical and Material Properties

The probe tip utilizes Polyphenylene sulfide (PPS), a material known for its excellent chemical resistance and dimensional stability. Meanwhile, the probe case is manufactured from AISI 303 or 304 stainless steel, offering robust mechanical protection and corrosion resistance. For installation, this reverse mount probe handles a maximum rated torque of 22.6 N•m (200 in•lb). However, we recommend applying only 7.5 N•m (66 in•lb) to prevent thread or case damage. The 3/8-24 thread specification allows a maximum thread engagement of 0.563 inches. The cable weight is approximately 323 g/m (11.4 oz), contributing to the total system weight of roughly 0.25 kg for this 0.5-meter configuration. Additionally, the optional armor uses flexible AISI 302 or 304 stainless steel with an FEP outer jacket for added protection in harsh environments.

Environmental Limits and Operating Conditions

Temperature and Pressure Ratings

The Bently Nevada 330105-02-12-05-02-01 operates within a temperature range of -52°C to +177°C (-62°F to +350°F) for the standard configuration. The storage temperature matches this same range. Importantly, you should avoid exposing this probe to temperatures below -34°C (-30°F) for extended periods, as this condition may lead to premature failure of the pressure seal. The probe is engineered to seal differential pressure between the tip and the case, using a Viton O-ring as the sealing element. While probes are not pressure tested prior to shipment, you can contact the custom design department if your application requires specific pressure seal verification.

Humidity and Chemical Resistance

The 3300 XL 8 mm probe demonstrates excellent humidity resistance, with less than a 3% change in Average Scale Factor (ASF) when tested in 93% relative humidity according to IEC standard 68-2-3 for up to 56 days. This exceptional performance ensures measurement stability even in humid environments. Additionally, the PPS probe tip material offers strong resistance to many chemicals commonly encountered in industrial settings. The gold-plated brass ClickLoc connectors resist corrosion and maintain low contact resistance throughout the product's service life.

Installation Guidelines for the 3300 XL 8 mm Probe

Mounting and Torque Requirements

First, inspect the mounting surface and thread hole to ensure they are clean and free from burrs or debris. Next, carefully thread the 330105-02-12-05-02-01 into the mounting hole by hand until it seats properly. Then, use a torque wrench to tighten the probe to the recommended setting of 7.5 N•m (66 in•lb). Never exceed the maximum rated torque of 22.6 N•m (200 in•lb), as this may cause irreversible damage. Finally, connect the miniature ClickLoc coaxial connector by pushing it firmly until you hear a distinctive click, confirming a secure and locked connection.

Wiring and Cable Management

For field wiring, use conductors sized from 0.2 to 1.5 mm² (16 to 24 AWG). When using ferrules, the acceptable conductor range becomes 0.25 to 0.75 mm² (18 to 23 AWG). Route the probe cable away from high-voltage lines, variable frequency drives, and other electromagnetic interference sources. Secure the cable with appropriate clamps or ties at regular intervals, but avoid over-tightening. The maximum cable length between the probe and monitor is 305 meters (1,000 feet), though you should consult frequency response data for signal rolloff when using longer field wiring runs.

Packaging and Delivery Information

Packaging List

Each unit of the Bently Nevada 330105-02-12-05-02-01 includes the following items:

• 3300 XL 8 mm reverse mount probe assembly with 0.5-meter standard cable

• Miniature ClickLoc coaxial connector (factory-installed)

• Installation instruction sheet (quick-reference guide)

• Protective shipping cap for the probe tip

Shipping and Logistics

We ship all orders via FedEx, UPS, or DHL to ensure timely and reliable delivery. Each package is carefully packed with protective materials to prevent damage during transit. Orders typically ship within 24 hours of payment confirmation. You will receive tracking information via email once your order leaves our warehouse.

Frequently Asked Questions

1. What is the advantage of the reverse mount design for this probe?
The reverse mount configuration allows installation from behind the mounting surface, which provides greater flexibility in mechanical design and often simplifies installation in spaces with limited access.

2. Can I use the 330105-02-12-05-02-01 with an extension cable?
Yes, you can extend the field wiring up to 305 meters (1,000 feet) using a three-conductor shielded triad cable. However, you should consult the frequency response graphs for signal rolloff characteristics at longer distances.

3. What torque should I apply when installing this probe?
Apply 7.5 N•m (66 in•lb) for standard installation. The maximum rated torque is 22.6 N•m (200 in•lb), and exceeding this value may cause mechanical damage.

4. Is this probe suitable for high-temperature applications?
The standard configuration operates up to +177°C (+350°F). If your application requires higher temperatures, consider the extended temperature range option that supports up to +218°C (+425°F) at the probe tip.

5. What is the linear range for the 3300 XL 8 mm probe?
The 3300 XL 8 mm series provides a linear range of 2 mm (80 mils), which begins at approximately 0.25 mm from the target and extends to 2.25 mm. This wide range accommodates most turbomachinery monitoring requirements.